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Wang SY, Zhang SJ, Meng HF, Xu HQ, Guo ZX, Yan JF, Gao JL, Niu LN, Wang SL, Jiao K. DPSCs regulate epithelial-T cell interactions in oral submucous fibrosis. Stem Cell Res Ther 2024; 15:113. [PMID: 38650025 PMCID: PMC11036714 DOI: 10.1186/s13287-024-03720-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2023] [Accepted: 04/07/2024] [Indexed: 04/25/2024] Open
Abstract
BACKGROUND Oral submucous fibrosis (OSF) is a precancerous lesion characterized by fibrous tissue deposition, the incidence of which correlates positively with the frequency of betel nut chewing. Prolonged betel nut chewing can damage the integrity of the oral mucosal epithelium, leading to chronic inflammation and local immunological derangement. However, currently, the underlying cellular events driving fibrogenesis and dysfunction are incompletely understood, such that OSF has few treatment options with limited therapeutic effectiveness. Dental pulp stem cells (DPSCs) have been recognized for their anti-inflammatory and anti-fibrosis capabilities, making them promising candidates to treat a range of immune, inflammatory, and fibrotic diseases. However, the application of DPSCs in OSF is inconclusive. Therefore, this study aimed to explore the pathogenic mechanism of OSF and, based on this, to explore new treatment options. METHODS A human cell atlas of oral mucosal tissues was compiled using single-cell RNA sequencing to delve into the underlying mechanisms. Epithelial cells were reclustered to observe the heterogeneity of OSF epithelial cells and their communication with immune cells. The results were validated in vitro, in clinicopathological sections, and in animal models. In vivo, the therapeutic effect and mechanism of DPSCs were characterized by histological staining, immunohistochemical staining, scanning electron microscopy, and atomic force microscopy. RESULTS A unique epithelial cell population, Epi1.2, with proinflammatory and profibrotic functions, was predominantly found in OSF. Epi1.2 cells also induced the fibrotic process in fibroblasts by interacting with T cells through receptor-ligand crosstalk between macrophage migration inhibitory factor (MIF)-CD74 and C-X-C motif chemokine receptor 4 (CXCR4). Furthermore, we developed OSF animal models and simulated the clinical local injection process in the rat buccal mucosa using DPSCs to assess their therapeutic impact and mechanism. In the OSF rat model, DPSCs demonstrated superior therapeutic effects compared with the positive control (glucocorticoids), including reducing collagen deposition and promoting blood vessel regeneration. DPSCs mediated immune homeostasis primarily by regulating the numbers of KRT19 + MIF + epithelial cells and via epithelial-stromal crosstalk. CONCLUSIONS Given the current ambiguity surrounding the cause of OSF and the limited treatment options available, our study reveals that epithelial cells and their crosstalk with T cells play an important role in the mechanism of OSF and suggests the therapeutic promise of DPSCs.
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Affiliation(s)
- S Y Wang
- Department of Stomatology, Tangdu Hospital & State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration & School of Stomatology, The Fourth Military Medical University, 169 West Changle Road, Xincheng District, 710032, Xi'an, Shaanxi, P. R. China
| | - S J Zhang
- State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, School of Stomatology, The Fourth Military Medical University, 169 West Changle Road, Xincheng District, 710032, Xi'an, Shaanxi, P. R. China
| | - H F Meng
- Beijing SH Bio-tech Co., 100071, Beijing, P.R. China
| | - H Q Xu
- Department of Stomatology, Tangdu Hospital & State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration & School of Stomatology, The Fourth Military Medical University, 169 West Changle Road, Xincheng District, 710032, Xi'an, Shaanxi, P. R. China
- The College of Life Science, Northwest University, 710032, Xi'an, Shaanxi, P.R. China
| | - Z X Guo
- Department of Stomatology, Tangdu Hospital & State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration & School of Stomatology, The Fourth Military Medical University, 169 West Changle Road, Xincheng District, 710032, Xi'an, Shaanxi, P. R. China
| | - J F Yan
- Department of Stomatology, Tangdu Hospital & State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration & School of Stomatology, The Fourth Military Medical University, 169 West Changle Road, Xincheng District, 710032, Xi'an, Shaanxi, P. R. China
| | - J L Gao
- State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, School of Stomatology, The Fourth Military Medical University, 169 West Changle Road, Xincheng District, 710032, Xi'an, Shaanxi, P. R. China
| | - L N Niu
- State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, School of Stomatology, The Fourth Military Medical University, 169 West Changle Road, Xincheng District, 710032, Xi'an, Shaanxi, P. R. China.
| | - S L Wang
- Beijing Laboratory of Oral Health, Capital Medical University, 10 Xitoutiao, Fengtai District, 100069, Beijing, P.R. China.
- Laboratory of Homeostatic Medicine, School of Medicine, Southern University of Science and Technology, No. 1088 Xueyuan Avenue, Nanshan District, 518055, Shenzhen, P.R. China.
| | - K Jiao
- Department of Stomatology, Tangdu Hospital & State Key Laboratory of Oral and Maxillofacial Reconstruction and Regeneration & School of Stomatology, The Fourth Military Medical University, 169 West Changle Road, Xincheng District, 710032, Xi'an, Shaanxi, P. R. China.
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Wang JL, Zhang BY, Qi MY, Meng HF, Jin TY, Chen Z, Duan WR. [Clinical evaluation methods for craniovertebral junction abnormalities]. Zhonghua Wai Ke Za Zhi 2024; 62:260-264. [PMID: 38291643 DOI: 10.3760/cma.j.cn112139-20230717-00013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/01/2024]
Abstract
Craniovertebral junction malformation is a congenital malformation located in the foramen magnum and upper cervical spine, including bone and nerve malformation, resulting in motor and sensory disorders, cerebellar and lower cranial nerves, etc. The evaluation methods of clinical symptoms and efficacy of craniovertebral junction malformation are important for the surgical indications and effects, mainly including the evaluation of clinical symptoms and the quality of life. At present, the commonly used methods in clinical work and literature are the Japanese orthopaedic association scores, visual analogue scales, 36-item short-form health survey, etc. Most of these clinical evaluations are not aimed at craniovertebral junction diseases but focus on the description of a certain type of clinical symptoms. Chicago Chiari outcome scale and syringomyelia outcome scale of Xuanwu hospital are dedicated to Craniovertebral junction malformation, but more clinical studies are needed to prove their effectiveness. Based on the literature reports, this article reviewed the previous clinical evaluation methods of craniovertebral junction malformation and discusses their applications and limitations.
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Affiliation(s)
- J L Wang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University; Spine Center, China International Neuroscience Institute, Beijing 100032, China
| | - B Y Zhang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University; Spine Center, China International Neuroscience Institute, Beijing 100032, China
| | - M Y Qi
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University; Spine Center, China International Neuroscience Institute, Beijing 100032, China
| | - H F Meng
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University; Spine Center, China International Neuroscience Institute, Beijing 100032, China
| | - T Y Jin
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University; Spine Center, China International Neuroscience Institute, Beijing 100032, China
| | - Z Chen
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University; Spine Center, China International Neuroscience Institute, Beijing 100032, China
| | - W R Duan
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University; Spine Center, China International Neuroscience Institute, Beijing 100032, China
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Liao YJ, Hsieh YC, Chen JT, Yang LS, Jian XZ, Lin SH, Lin YR, Chen LM, Li F, Hsiao YT, Liao CY, Chang YM, Huang YY, Tsao CS, Horng SF, Chao YC, Meng HF. Large-Area Nonfullerene Organic Photovoltaic Modules with a High Certified Power Conversion Efficiency. ACS Appl Mater Interfaces 2023; 15:7911-7918. [PMID: 36719898 DOI: 10.1021/acsami.2c17418] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/18/2023]
Abstract
Achieving large-area organic photovoltaic (OPV) modules with reasonable cost and performance is an important step toward commercialization. In this work, solution-processed conventional and inverted OPV modules with an area of 216 cm2 were fabricated by the blade coating method. Film uniformity was controlled by adjusting the fabrication parameters of the blade coating procedure. The influence of the concentration of the solutions of the interfacial materials on OPV module performance was investigated. For OPV modules based on the PM6:Y6 photoactive layer, a certificated power conversion efficiency (PCE) of 9.10% was achieved for the conventional OPV modules based on the TASiW-12 interfacial layer while a certificated PCE of 11.27% was achieved for the inverted OPV modules based on the polyethylenimine (PEI) interfacial layer. As for OPV modules based on a commercially available photoactive layer, PV-X Plus, a PCE of 8.52% was achieved in the inverted OPV modules. A halogen-free solvent, o-xylene, was used as the solvent for PV-X Plus, which makes the industrial production much more environmentally friendly.
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Affiliation(s)
- Yan-Jia Liao
- Institute of Electronic Engineering, National Tsing Hua University, Hsinchu 300, Taiwan
| | - Yu-Chao Hsieh
- Institute of Physics, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
| | - Jui-Tso Chen
- Institute of Electronic Engineering, National Tsing Hua University, Hsinchu 300, Taiwan
| | - Lan-Sheng Yang
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Xin-Zhe Jian
- Institute of Physics, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
| | - Shih-Hung Lin
- Institute of Electronic Engineering, National Tsing Hua University, Hsinchu 300, Taiwan
| | - Yi-Ru Lin
- Institute of Physics, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
| | - Li-Min Chen
- Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
| | - Fenghong Li
- State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun, Jilin 130012, PR China
| | - Yu-Tang Hsiao
- Raynergy Tek Incorporation, Hsinchu Science Park, Hsinchu 30844, Taiwan
| | - Chuang-Yi Liao
- Raynergy Tek Incorporation, Hsinchu Science Park, Hsinchu 30844, Taiwan
| | - Yi-Ming Chang
- Raynergy Tek Incorporation, Hsinchu Science Park, Hsinchu 30844, Taiwan
| | - Yu-Yu Huang
- Taiwan Agricultural Research Institute, Wufeng, Taichung City 413008, Taiwan
| | - Cheng-Si Tsao
- Department of Materials Science and Engineering, National Taiwan University, Taipei 10617, Taiwan
- Institute of Nuclear Energy Research, Longtan, Taoyuan 32546, Taiwan
| | - Sheng-Fu Horng
- Institute of Electronic Engineering, National Tsing Hua University, Hsinchu 300, Taiwan
| | - Yu-Chiang Chao
- Institute of Physics, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
- Department of Physics, National Taiwan Normal University, Taipei 116, Taiwan
| | - Hsin-Fei Meng
- Institute of Physics, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
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Chang WL, Sun IM, Tsai JA, Meng HF, Zan HW, Chen LY, Lu CJ. Rapid quality test for drinking water by vertical-channel organic semiconductor gas sensor. Anal Chim Acta 2022; 1206:339729. [DOI: 10.1016/j.aca.2022.339729] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2021] [Revised: 02/09/2022] [Accepted: 03/13/2022] [Indexed: 11/01/2022]
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Madhaiyan G, Sun AT, Zan HW, Meng HF, Horng SF, Chen LY, Hung HW. Solution-Processed Chloroaluminum Phthalocyanine (ClAlPc) Ammonia Gas Sensor with Vertical Organic Porous Diodes. Sensors (Basel) 2021; 21:5783. [PMID: 34502673 PMCID: PMC8433672 DOI: 10.3390/s21175783] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 08/19/2021] [Accepted: 08/24/2021] [Indexed: 02/03/2023]
Abstract
In this research work, the gas sensing properties of halogenated chloroaluminum phthalocyanine (ClAlPc) thin films were studied at room temperature. We fabricated an air-stable ClAlPc gas sensor based on a vertical organic diode (VOD) with a porous top electrode by the solution process method. The surface morphology of the solution-processed ClAlPc thin film was examined by field emission scanning electron microscopy (FESEM) and atomic force microscopy (AFM). The proposed ClAlPc-based VOD sensor can detect ammonia (NH3) gas at the ppb level (100~1000 ppb) at room temperature. Additionally, the ClAlPc sensor was highly selective towards NH3 gas compared to other interfering gases (NO2, ACE, NO, H2S, and CO). In addition, the device lifetime was tested by storing the device at ambient conditions. The effect of relative humidity (RH) on the ClAlPc NH3 gas sensor was also explored. The aim of this study is to extend these findings on halogenated phthalocyanine-based materials to practical electronic nose applications in the future.
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Affiliation(s)
- Govindsamy Madhaiyan
- Institute of Physics, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan;
| | - An-Ting Sun
- Department of Electrical Engineering, National Tsing Hua University, Hsinchu 30010, Taiwan; (A.-T.S.); (S.-F.H.)
| | - Hsiao-Wen Zan
- Department of Photonics, Institute of Electro-Optical Engineering, College of Electrical and Computer, Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan;
| | - Hsin-Fei Meng
- Institute of Physics, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan;
| | - Sheng-Fu Horng
- Department of Electrical Engineering, National Tsing Hua University, Hsinchu 30010, Taiwan; (A.-T.S.); (S.-F.H.)
| | - Li-Yin Chen
- Department of Photonics, Institute of Electro-Optical Engineering, College of Electrical and Computer, Engineering, National Yang Ming Chiao Tung University, Hsinchu 30010, Taiwan;
| | - Hsiao-Wen Hung
- Intelligent Energy-Saving Systems Division, Green Energy and Environment Research Laboratories, Industrial Technology Research Institute, Hsinchu 30010, Taiwan;
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Nguyen AT, Ho YW, Yu WC, Zan HW, Meng HF, Chou YC. Stable and Reversible Photoluminescence from GaN Nanowires in Solution Tuning by Ionic Concentration. Nanoscale Res Lett 2021; 16:45. [PMID: 33704602 PMCID: PMC7952484 DOI: 10.1186/s11671-021-03473-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 01/03/2021] [Indexed: 06/12/2023]
Abstract
We report response of photoluminescence (PL) from GaN nanowires without protection in solutions. The distinct response is not only toward pH but toward ionic concentration under same pH. The nanowires appear to be highly stable under aqueous solution with high ionic concentration and low pH value down to 1. We show that the PL has a reversible interaction with various types of acidic and salt solutions. The quantum states of nanowires are exposed to the external environment and have a direct physical interaction which depends on the anions of the acids. As the ionic concentration increases, the PL intensity goes up or down depending on the chemical species. The response results from a competition of change in surface band bending and charge transfer to redox level in solution. That of GaN films is reported for comparison as the effect of surface band bending can be neglected so that there are only slight variations in PL intensity for GaN films. Additionally, such physical interaction does not impact on the PL peaks in acids and salts, whereas there is a red shift on PL when the nanowires are in basic solution, say NH4OH, due to chemical etching occurred on the nanowires.
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Affiliation(s)
- Anh Thi Nguyen
- Institute of Physics, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan
| | - Ya-Wen Ho
- Department of Photonics, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan
| | - Wei-Cheng Yu
- Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan
| | - Hsiao-Wen Zan
- Department of Photonics, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan
| | - Hsin-Fei Meng
- Institute of Physics, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan.
| | - Yi-Chia Chou
- Department of Electrophysics, National Yang Ming Chiao Tung University, Hsinchu, 30010, Taiwan.
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Ho HH, Nguyen AT, Chen YC, Chen LY, Dang HP, Tsai MJ, Cheng H, Horng SF, Huang CS, Zan HW, Meng HF. A Cylindrical Ion Sensor Tip with a Diameter of 1.5 mm for Potentially Invasive Medical Application. ACS Omega 2020; 5:23021-23027. [PMID: 32954152 PMCID: PMC7495754 DOI: 10.1021/acsomega.0c02725] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Accepted: 08/19/2020] [Indexed: 06/11/2023]
Abstract
A fine cylindrical chemical sensor tip is developed with optical fiber in the core, surrounded by a transparent cylinder of photopolymer Norland Optical Adhesive 61 (NOA 61), and covered by a polymer hydrogel mixed with sensing molecules. The overall diameter is as small as 1.5 mm. pH response is demonstrated using two approaches of sensing materials: (i) absorbing probe Phenol Red mixed with Rhodamine 6G fluorescent dye and (ii) 8-hydroxypyrene-1,3,6-trisulfonic acid fluorescent probe. Both the optical excitation and fluorescence signal collection are through the optical fibers. A time resolution of 10 s is achieved for pH variations. Good linearity is observed in the physiological range from pH 7.0 to pH 8.6 with reversible and reproducible outcomes. For in vitro urea measurement, the sensor tip can distinguish 1, 3, and 5 mM urea solution, which is a crucial range in saliva urea concentration. The miniaturized tip with such simple cylindrical symmetry is designed to detect vital signs during minimally invasive surgeries and can be potentially accompanied with endoscopes to enter human bodies.
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Affiliation(s)
- Hsin-Hsien Ho
- Institute
of Electronic Engineering, National Tsing
Hua University, Hsinchu 300, Taiwan
| | - Anh-Thi Nguyen
- Institute
of Physics, National Chiao Tung University, Hsinchu 300, Taiwan
| | - Yen-Chi Chen
- Department
of Mechanical Engineering, National Chiao
Tung University, Hsinchu 300, Taiwan
| | - Li-Yin Chen
- Department
of Photonics, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
| | - Huu-Phuoc Dang
- Institute
of Physics, National Chiao Tung University, Hsinchu 300, Taiwan
| | - May-Jywan Tsai
- Department
of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei 11217, Taiwan
| | - Henrich Cheng
- Department
of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei 11217, Taiwan
| | - Sheng-Fu Horng
- Institute
of Electronic Engineering, National Tsing
Hua University, Hsinchu 300, Taiwan
| | - Cheng-Sheng Huang
- Department
of Mechanical Engineering, National Chiao
Tung University, Hsinchu 300, Taiwan
| | - Hsiao-Wen Zan
- Department
of Photonics, College of Electrical and Computer Engineering, National Chiao Tung University, Hsinchu 300, Taiwan
| | - Hsin-Fei Meng
- Institute
of Physics, National Chiao Tung University, Hsinchu 300, Taiwan
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Hong CY, Wu YC, Lin YH, Liu Y, Chow CW, Meng HF, Chang YM, Yeh CH, Hsu KL, Song SH. Visible light positioning (VLP) system using low-cost organic photovoltaic cell (OPVC) for low illumination environments. Opt Express 2020; 28:26137-26142. [PMID: 32906889 DOI: 10.1364/oe.399711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Accepted: 07/01/2020] [Indexed: 06/11/2023]
Abstract
We propose and demonstrate a received-signal-strength (RSS) based visible light positioning (VLP) system using a low-cost organic photovoltaic cell (OPVC) receiver (Rx). The OPVC is a passive device without the need of external power supply. It could detect VLC signal and harvest energy. Our developed OPVC has a high power conversion efficiency (PCE) of 9.8%. The VLP system can be operated at a low illumination of 130 lux. The regression machine learning (ML) algorithm is used to enhance the positioning accuracy.
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Tsai MJ, Cheng H, Ho HH, Lin PW, Liou DY, Fang TC, Li CW, Kwan K, Chen YC, Huang CS, Horng SF, Hung CH, Zan HW, Meng HF. Hydrogel-based zinc ion sensor on optical fiber with high resolution and application to neural cells. Biosens Bioelectron 2020; 162:112230. [PMID: 32392152 DOI: 10.1016/j.bios.2020.112230] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 04/09/2020] [Accepted: 04/16/2020] [Indexed: 11/28/2022]
Abstract
Solid-state zinc ion sensor is developed with high enough resolution and reproducibility for the potential application in brain injury monitoring. An optical diffuser is incorporated into the zinc ion sensor based on optical fiber and hydrogel doped with the fluorescent zinc ion probe molecule meso-2,6-Dichlorophenyltripyrrinone (TPN-Cl2). The diffuser transforms the high-peak-intensity excitation light near the fiber end into a broad light with moderate local intensity to reduce the degradation of the probe molecule. Reversible detection can be reached for 1, 2, and 5 μM (10-6 Molar), with slopes 0.3, 0.6, and 0.8 respectively. This is the pathophysiological concentration range after brain injury. The sensor is applied to neuron-glial cultures and macrophage under the stimulation of lipopolysaccharide (LPS), KCl and oxygen/glucose deprivation (OGD) that reflect inflammation, depolarization and ischemia respectively, mimicking events after brain injury. The zinc ion level is raised to 4-5 μM after LPS treatment, and then reduced to <3 μM after the co-treatment with the herbal drug silymarin. The results suggest the conditions of the neural cells under stress can be monitored.
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Affiliation(s)
- May-Jywan Tsai
- Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei, 11217, Taiwan
| | - Henrich Cheng
- Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei, 11217, Taiwan; Institute of Pharmacology, National Yang-Ming University, Taipei, 11217, Taiwan
| | - Hsin-Hsien Ho
- Institute of Electronic Engineering, National Tsing Hua University, Hsinchu, 300, Taiwan
| | - Peng-Wei Lin
- Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu, 300, Taiwan
| | - Dann-Ying Liou
- Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei, 11217, Taiwan
| | - Teng-Ching Fang
- Institute of Physics, National Chiao Tung University, Hsinchu, 300, Taiwan
| | - Chao-Wei Li
- Institute of Physics, National Chiao Tung University, Hsinchu, 300, Taiwan
| | - Karmeng Kwan
- Institute of Physics, National Chiao Tung University, Hsinchu, 300, Taiwan
| | - Yen-Chi Chen
- Institute of Mechanical Engineering, National Chiao Tung University, Hsinchu, 300, Taiwan
| | - Cheng-Sheng Huang
- Institute of Mechanical Engineering, National Chiao Tung University, Hsinchu, 300, Taiwan
| | - Sheng-Fu Horng
- Institute of Electronic Engineering, National Tsing Hua University, Hsinchu, 300, Taiwan
| | | | - Hsiao-Wen Zan
- Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, Hsinchu, 300, Taiwan.
| | - Hsin-Fei Meng
- Institute of Physics, National Chiao Tung University, Hsinchu, 300, Taiwan.
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Chang PY, Lin CF, El Khoury Rouphael S, Huang TH, Wu CM, Berling D, Yeh PH, Lu CJ, Meng HF, Zan HW, Soppera O. Near-Infrared Laser-Annealed IZO Flexible Device as a Sensitive H 2S Sensor at Room Temperature. ACS Appl Mater Interfaces 2020; 12:24984-24991. [PMID: 32367710 DOI: 10.1021/acsami.0c03257] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A metal-oxide material (indium zinc oxide [IZO]) device with near-infrared (NIR) laser annealing was demonstrated on both glass and bendable plastic substrates (polycarbonate, polyethylene, and polyethylene terephthalate). After only 60 s, the sheet resistance of IZO films annealed with a laser was comparable to that of thermal-annealed devices at temperatures in the range of 200-300 °C (1 h). XPS, ATR, and AFM were used to investigate the changes in the sheet resistance and correlate them to the composition and morphology of the thin film. Finally, the NIR-laser-annealed IZO films were demonstrated to be capable of detecting changes in humidity and serving as a highly sensitive gas sensor of hydrogen sulfide (in ppb concentration), with room-temperature operation on a bendable substrate.
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Affiliation(s)
- Po-Yi Chang
- Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu 30010, Taiwan
- Université de Haute-Alsace, CNRS, IS2M UMR 7361, F-68100 Mulhouse, France
- Université de Strasbourg, 67081 Strasbourg, France
| | - Ching-Fu Lin
- Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu 30010, Taiwan
- Université de Haute-Alsace, CNRS, IS2M UMR 7361, F-68100 Mulhouse, France
- Université de Strasbourg, 67081 Strasbourg, France
| | - Samer El Khoury Rouphael
- Université de Haute-Alsace, CNRS, IS2M UMR 7361, F-68100 Mulhouse, France
- Université de Strasbourg, 67081 Strasbourg, France
| | - Ting-Hsuan Huang
- Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu 30010, Taiwan
| | - Chang-Mao Wu
- Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu 30010, Taiwan
| | - Dominique Berling
- Université de Haute-Alsace, CNRS, IS2M UMR 7361, F-68100 Mulhouse, France
- Université de Strasbourg, 67081 Strasbourg, France
| | - Ping-Hung Yeh
- Department of Physics, Tamkang University, No. 151, Yingzhuan Road, Tamsui District, New Taipei City 25137, Taiwan
| | - Chia-Jung Lu
- Department of Chemistry, National Taiwan Normal University, 162, Section 1, Heping E. Road, Taipei 106, Taiwan
| | - Hsin-Fei Meng
- Institute of Physics, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu 30010 Taiwan
| | - Hsiao-Wen Zan
- Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, 1001 Ta Hsueh Road, Hsinchu 30010, Taiwan
| | - Olivier Soppera
- Université de Haute-Alsace, CNRS, IS2M UMR 7361, F-68100 Mulhouse, France
- Université de Strasbourg, 67081 Strasbourg, France
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11
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Chen CC, Hsieh JC, Chao CH, Yang WS, Cheng HT, Chan CK, Lu CJ, Meng HF, Zan HW. Correlation between breath ammonia and blood urea nitrogen levels in chronic kidney disease and dialysis patients. J Breath Res 2020; 14:036002. [DOI: 10.1088/1752-7163/ab728b] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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12
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Chang YF, Yang LS, Su HT, Liao SY, Niu MC, Mahesh KPO, Chen CH, Chao YC, Meng HF, Huang HL, Chao TC, Tseng MR, Luo CW, Zan HW, Horng SF. All-Solution-Processed Red and Orange-Red Organic Light-Emitting Diodes with High-Efficiencies: The Effect of Mixed-Host Emissive Layers and Thermal Annealing Treatment. Chempluschem 2020; 84:1375-1383. [PMID: 31944041 DOI: 10.1002/cplu.201900248] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Indexed: 11/12/2022]
Abstract
The instability of the organic light-emitting diodes (OLEDs) during operation can be attributed to the existence of point defects on the organic layers. In this work, the effect of mixed-host emissive layer and the thermal annealing treatment were investigated to eliminate defects and to boost the device performance. The mixed-host system includes 4,4',4''-tri (9-carbazoyl) triphenylamine (TCTA) and 2,7-bis(diphenylphosphoryl)-9, 9'-spirobi[fluorene] (SPPO13). The mixed-host emissive layer with thermal annealing treatment showed low roughness and few pinholes, and the devices fabricated from this emissive layer exhibited high efficiencies, high stabilities, and long lifetimes. The red and orange-red OLEDs exhibited efficiencies of 13.9 cd/A and 24.35 cd/A, respectively. The longest half-lifetime (L0 =500 cd/m2 ) of the red and orange-red OLEDs were 158 h and 180 h, respectively. Efforts were made to solve problems in large-area coating and to reduce the number of defects on in organic layer. Large-active-area (active area=3 cm×4 cm) red phosphorescent OLEDs (PhOLEDs) devices were realized with very high current efficiency up to 9 cd/A.
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Affiliation(s)
- Yu-Fan Chang
- Institue of Physics, National Chiao Tung University, 1001 University Road, Hsinchu, Taiwan
| | - Lan-Sheng Yang
- Department of Electrophysics, National Chiao Tung University, 1001 University Road, Hsinchu, Taiwan
| | - Hsiao-Tso Su
- Department of Electrophysics, National Chiao Tung University, 1001 University Road, Hsinchu, Taiwan
| | - Si-Yi Liao
- Institue of Physics, National Chiao Tung University, 1001 University Road, Hsinchu, Taiwan
| | - Mu-Chun Niu
- Department of Physics, National Taiwan Normal University, 88, Sec.4, Ting-Chou Rd., Taipei, 116, Taiwan
| | - K P O Mahesh
- Department of Physics, National Taiwan Normal University, 88, Sec.4, Ting-Chou Rd., Taipei, 116, Taiwan
| | - Chao-Hsuan Chen
- Department of Photonics, National Chiao Tung University, 1001 University Road, Hsinchu, Taiwan
| | - Yu-Chiang Chao
- Department of Physics, National Taiwan Normal University, 88, Sec.4, Ting-Chou Rd., Taipei, 116, Taiwan
| | - Hsin-Fei Meng
- Institue of Physics, National Chiao Tung University, 1001 University Road, Hsinchu, Taiwan
| | | | | | - Meu-Rurng Tseng
- Material and Chemical Research Laboratories, Industrial Technology Research Institute, 195, Sec. 4, Chung Hsing Rd., Chutung, Hsinchu, Taiwan
| | - Chih-Wei Luo
- Department of Electrophysics, National Chiao Tung University, 1001 University Road, Hsinchu, Taiwan
| | - Hsiao-Wen Zan
- Department of Photonics, National Chiao Tung University, 1001 University Road, Hsinchu, Taiwan
| | - Sheng-Fu Horng
- Department of Electrical Engineering, National Tsing Hua University, No. 101, Section 2, Kuang-Fu Road, Hsinchu, Taiwan
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13
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Yang LS, Meng HF, Chao YC, Huang HC, Luo CW, Zan HW, Horng SF, Huang HL, Lai CC, Liou YM. The influence of the interfacial layer on the stability of all-solution-processed organic light-emitting diodes. RSC Adv 2020; 10:28766-28777. [PMID: 35520068 PMCID: PMC9055847 DOI: 10.1039/d0ra03364b] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 07/06/2020] [Indexed: 11/24/2022] Open
Abstract
Improving the stability of large-area organic light-emitting diodes is very important for practical applications. The interfacial layer plays a crucial role to improve the electron injection characteristic. In this work, devices prepared by various solution-processed interfacial materials and thermal-evaporated CsF were compared. In the devices with active area of 2.25 mm × 2.25 mm, we found that the performance and lifetime of the device with solution-processed Liq interfacial layer was comparable with the device with thermal-evaporated CsF. However, for the devices with active area of 2.4 cm × 3.7 cm, the device based on thermal-evaporated CsF was the champion in both performance and lifetime. The influence of the thickness of CsF on the stability was investigated. The most stable blue fluorescent devices can be achieved when the thickness of CsF is about 0.1 nm, while the most stable green phosphorescent devices can be obtained by depositing 0.2 nm CsF. The best current efficiency for the blue fluorescent device is 4 cd A−1, while the best one for the green phosphorescent device is 22 cd A−1. Furthermore, burning points causing the failure of the devices were investigated by scanning electron microscopy, atomic force microscopy, thermography and secondary ion mass spectrometry. We demonstrated that burning points are defects, which can be observed after long-time operation, showing higher local temperature and fragmentary electrode. Devices prepared by various solution-processed interfacial materials are compared with devices with thermal-evaporated CsF.![]()
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Affiliation(s)
- Lan-Sheng Yang
- Department of Electrophysics
- National Chiao Tung University
- Hsinchu 30010
- Taiwan
| | - Hsin-Fei Meng
- Institute of Physics
- National Chiao Tung University
- Hsinchu 30010
- Taiwan
| | - Yu-Chiang Chao
- Department of Physics
- National Taiwan Normal University
- Taipei 116
- Taiwan
| | - Hu-Chi Huang
- Institute of Physics
- National Chiao Tung University
- Hsinchu 30010
- Taiwan
| | - Chih-Wei Luo
- Department of Electrophysics
- National Chiao Tung University
- Hsinchu 30010
- Taiwan
| | - Hsiao-Wen Zan
- Institute of Electro-Optical Engineering
- National Chiao Tung University
- Hsinchu 30010
- Taiwan
| | - Sheng-Fu Horng
- Department of Electrical Engineering
- National Tsing Hua University
- Hsinchu
- Taiwan
| | | | | | - Yiing-Mei Liou
- Institute of Community Health Care
- School of Nursing
- National Yang-Ming University
- Taipei
- Taiwan
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14
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Huang CH, Chen ZY, Chiu CL, Huang TT, Meng HF, Yu P. Surface Micro-/Nanotextured Hybrid PEDOT:PSS-Silicon Photovoltaic Cells Employing Kirigami Graphene. ACS Appl Mater Interfaces 2019; 11:29901-29909. [PMID: 31353900 DOI: 10.1021/acsami.9b08366] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Kirigami graphene allows a two-dimensional material to transform into a three-dimensional structure, which constitutes an effective transparent electrode candidate for photovoltaic (PV) cells having a surface texture. The surface texture of an inverted pyramid was fabricated on a Si substrate using photolithography and wet etching, followed by metal-assisted chemical etching to obtain silicon nanowires on the surface of the inverted pyramid. Kirigami graphene with a cross-pattern array was prepared using photolithography and plasma etching on a copper foil. Then, kirigami graphene was transferred onto hybrid heterojunction PV cells with a poly(ethylene terephthalate)/silicone film. These cells consisted of poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS) as the p-type semiconductor, Si(100) as the inorganic n-type semiconductor, and a silver comb electrode on top of PEDOT:PSS. The conductivity of PEDOT:PSS was greatly improved. This improvement was significantly higher than that achieved by the continuous graphene sheet without a pattern. Transmission electron microscopy and Raman spectroscopy results revealed that the greater improvement with kirigami graphene was due to the larger contact area between PEDOT:PSS and graphene. By using two-layer graphene having a kirigami pattern, the power conversion efficiency, under simulated AM1.5G illumination conditions, was significantly augmented by up to 9.8% (from 10.03 to 11.01%).
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Affiliation(s)
- Chi-Hsien Huang
- Department of Materials Engineering , Ming Chi University of Technology , New Taipei City 24301 , Taiwan
| | | | | | - Tzu-Ting Huang
- Department of Materials Engineering , Ming Chi University of Technology , New Taipei City 24301 , Taiwan
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15
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Wang KH, Hsieh JC, Chen CC, Zan HW, Meng HF, Kuo SY, Nguyễn MTN. A low-cost, portable and easy-operated salivary urea sensor for point-of-care application. Biosens Bioelectron 2019; 132:352-359. [DOI: 10.1016/j.bios.2019.03.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 03/05/2019] [Accepted: 03/06/2019] [Indexed: 01/31/2023]
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16
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Yu SY, Tung TW, Yang HY, Chen GY, Shih CC, Lee YC, Chen CC, Zan HW, Meng HF, Lu CJ, Wang CL, Jian WB, Soppera O. A Versatile Method to Enhance the Operational Current of Air-Stable Organic Gas Sensor for Monitoring of Breath Ammonia in Hemodialysis Patients. ACS Sens 2019; 4:1023-1031. [PMID: 30892019 DOI: 10.1021/acssensors.9b00223] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Point-of-care (POC) application for monitoring of breath ammonia (BA) in hemodialysis (HD) patients has emerged as a promising noninvasive health monitoring approach. In this context, many organic gas sensors have been reported for BA detection. However, one of the major challenges for its integration with affordable household POC application is to achieve stable performance for accuracy and high operational current at low voltage for low-cost read-out circuitry. Herein, we exploited the stability of the Donor-Acceptor polymer on the cylindrical nanopore structure to realize the sensors with a high sensitivity and stability. Then, we proposed a double active layer (DL) strategy that exploits an ultrathin layer of Poly(3-hexylthiophene-2,5-diyl) (P3HT) to serve as a work function buffer to enhance the operational current. The DL sensor exhibits a sustainable enhanced operational current of microampere level and a stable sensing response even with the presence of P3HT layer. This effect is carefully examined with different aspects, including vertical composition profile of DL configuration, lifetime testing on different sensing layer, morphological analysis, and the versatility of the DL strategy. Finally, we utilize the DL sensor to conduct a tracing of BA concentration in two HD patients before and after HD, and correlate it with the blood urea nitrogen (BUN) levels. A good correlation coefficient of 0.96 is achieved. Moreover, the feasibility of DL sensor integrated into a low-cost circuitry was also verified. The results demonstrate the potential of this DL strategy to be used to integrate organic sensor for affordable household POC devices.
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Affiliation(s)
- Shang-Yu Yu
- Université de Haute-Alsace, CNRS, IS2M UMR 7361, F-68100 Mulhouse, France
- Université de Strasbourg, 4 rue Blaise Pascal CS 90032, F-67081 Strasbourg cedex, France
| | | | | | | | | | | | - Chang-Chiang Chen
- Department of Internal Medicine, Division of Nephrology, National Taiwan University Hospital Hsin-Chu Branch, 25, Lane 442, Section 1, Jingguo Road, 300 Hsinchu, Taiwan
| | | | | | - Chia-Jung Lu
- Department of Chemistry, National Taiwan Normal University, 162, Heping East Road, Section 1, 106 Taipei, Taiwan
| | | | | | - Olivier Soppera
- Université de Haute-Alsace, CNRS, IS2M UMR 7361, F-68100 Mulhouse, France
- Université de Strasbourg, 4 rue Blaise Pascal CS 90032, F-67081 Strasbourg cedex, France
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17
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Liao SY, Su HT, Hsiao YH, Chang YF, Chang CW, Niu MC, Meng HF, Yen C, Chao YC, Chang CY, Zan HW, Horng SF. Leakage-free solution-processed organic light-emitting diode using a ternary host with single-diode emission area up to 6 × 11.5 cm 2. RSC Adv 2019; 9:10584-10598. [PMID: 35515314 PMCID: PMC9062511 DOI: 10.1039/c8ra10363a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2018] [Accepted: 03/10/2019] [Indexed: 12/02/2022] Open
Abstract
The electrical current leakage and stability are studied for solution-processed OLEDs with areas of 4.45 mm2, 3 × 3.2 cm2, and 6 × 11.5 cm2. The emission layer of the OLED has a ternary or binary mixed host with hole-transporting molecules tris(4-carbazoyl-9-ylphenyl)amine (TCTA) and 9-(4-tert-butylphenyl)-3,6-bis(triphenylsilyl)-9H-carbazole (CzSi), together with the electron-transporting molecule 2,7-bis(diphenylphosphoryl)-9,9′-spirobi[fluorene] (SPPO13). The phosphorescent emitters are Ir(mppy)3 for green and bis[4-(4-tert-butylphenyl)thieno[3,2-c]pyridine][N,N′-diisopropylbenamidinato]iridium(iii) (PR-02) for orange. Poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(4,4′-(N-(4-sec-butylphenyl))diphenylamine)] (TFB) is used as the hole transport layer and PEDOT:PSS is used as the hole injection layer. On top of the emission layer, CsF/Al is deposited by thermal evaporation as the cathode. All organic layers are deposited by blade coating and the initial current leaking defects can be avoided by careful control of the coating conditions. The detrimental burning point caused by a local current short developed after long-time operation can be avoided by reducing the operation voltage using a ternary mixed host. The operation voltage is only 4 V at 100 cd m−2 and 5 V at 250 cd m−2 for the green emitting device. Furthermore, the crystallization defect is reduced by the ternary host. For the orange emitting device, the binary host is good enough with an operating voltage of 5 V at 100 cd m−2. For an area as large as 6 × 11.5 cm2, the OLED shows good stability and there is no burning point after an operation of over 1600 hours. OLEDs with an emission layer consisting of ternary mixed host materials are prepared with operation of over 1600 hours.![]()
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Affiliation(s)
- Si-Yi Liao
- Institute of Physics, National Chiao Tung University Hsinchu Taiwan
| | - Hsiao-Tso Su
- Department of Electrophysics, National Chiao Tung University Hsinchu Taiwan
| | - Yung-Hung Hsiao
- Department of Electrical Engineering, National Tsing Hua University Hsinchu Taiwan
| | - Yu-Fan Chang
- Institute of Physics, National Chiao Tung University Hsinchu Taiwan
| | - Chiung-Wen Chang
- Institute of Physics, National Chiao Tung University Hsinchu Taiwan
| | - Mu-Chun Niu
- Department of Physics, National Taiwan Normal University Taipei Taiwan
| | - Hsin-Fei Meng
- Institute of Physics, National Chiao Tung University Hsinchu Taiwan
| | - Chun Yen
- Institute of Physics, National Chiao Tung University Hsinchu Taiwan
| | - Yu-Chiang Chao
- Department of Physics, National Taiwan Normal University Taipei Taiwan
| | - Chih-Yu Chang
- Graduate Institute of Nanomedicine and Medical Engineering, Taipei Medical University Taipei Taiwan
| | - Hsiao-Wen Zan
- Department of Photonics, National Chiao Tung University Hsinchu Taiwan
| | - Sheng-Fu Horng
- Department of Electrical Engineering, National Tsing Hua University Hsinchu Taiwan
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18
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Chen CH, Lin ZW, Huang KM, Meng HF, Chen SH, Ge Z, Zan HW, Chang CY, Chao YC, Horng SF. Thermally Stable High-Performance Polymer Solar Cells Enabled by Interfacial Engineering. ChemSusChem 2018; 11:2429-2435. [PMID: 29766668 DOI: 10.1002/cssc.201800768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 05/09/2018] [Indexed: 06/08/2023]
Abstract
Interfacial engineering plays an important role in determining the performance and stability of polymer solar cells (PSCs). In this study, thermally stable highly efficient PSCs are fabricated by incorporating a solution-processed cathode interfacial layer (CIL), including 4,4'-({[methyl(4-sulfonatobutyl)ammonio]bis(propane-3,1-diyl)}bis(dimethylammoniumdiyl))bis(butane-1-sulfonate) (MSAPBS) and polyethylenimine (PEI). For PSCs based on blends of poly{4,8-bis[5-(2-ethylhexyl)thiophen-2-yl]benzo[1,2-b;4,5-b']dithiophene-2,6-diyl-alt-[4-(2-ethylhexyl)-3fluorothieno[3,4-b]thiophene-2-carboxylate-2,6-diyl]} (PBDTTT-EFT) and [6,6]-phenyl C71 -butyric acid methyl ester (PC71 BM), the maximum power conversion efficiency (PCE) of inverted PSCs reaches 8.1 % and 7.2 % for MSAPBS and PEI CILs, respectively. The inverted PEI devices exhibit remarkable stability (lifetime >6000 h) under accelerated thermal aging (at 80 °C in ambient environment), which is much superior to that of the device with commonly used LiF CIL (lifetime≈33 h). This stability represents the best result reported for PSCs. The promising results based on this strategy can stimulate further work on the development of novel CILs for PSCs and pave the way towards the realization of commercially viable PSCs with high performance and long-term stability.
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Affiliation(s)
- Chao-Hsuan Chen
- Department of Photonics and Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, 1001 University Road, Hsinchu, 300, Taiwan
| | - Zhi-Wei Lin
- Institute of Electronic Engineering, National Tsing Hua University, 101 Section 2, Kuang Fu Road, Hsinchu, 300, Taiwan
| | - Kuan-Min Huang
- Department of Photonics and Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, 1001 University Road, Hsinchu, 300, Taiwan
| | - Hsin-Fei Meng
- Institute of Physics, National Chiao Tung University, 1001 University Road, Hsinchu, 300, Taiwan
| | - Szu-Han Chen
- Institute of Physics, National Chiao Tung University, 1001 University Road, Hsinchu, 300, Taiwan
| | - Ziyi Ge
- Ningbo Institute of Materials Technology and Engineering, Chinese Academy of Sciences, 519 Zhuangshi Road, Ningbo, 315201, China
| | - Hsiao-Wen Zan
- Department of Photonics and Institute of Electro-Optical Engineering, College of Electrical and Computer Engineering, National Chiao Tung University, 1001 University Road, Hsinchu, 300, Taiwan
| | - Chih-Yu Chang
- Graduate Institute of Nanomedicine and Medical Engineering, 250 Wu-Hsing Street, Taipei, 110, Taiwan
| | - Yu-Chiang Chao
- Department of Physics, National (Taiwan) Normal University, 162 Section 1, Heping E. Rd., Taipei, 106, Taiwan
| | - Sheng-Fu Horng
- Institute of Electronic Engineering, National Tsing Hua University, 101 Section 2, Kuang Fu Road, Hsinchu, 300, Taiwan
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Abstract
In this work, a TFB (poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(4,4'-(N-(4-s-butylphenyl)diphenylamine)]) sensor with a cylindrical nanopore structure exhibits a high sensitivity to ammonia in ppb-regime. The lifetime and sensitivity of the TFB sensor were studied and compared to those of P3HT (poly(3-hexylthiophene)), NPB (N,N'-di(1-naphthyl)-N,N'-diphenyl-(1,1'-biphenyl)-4,4'-diamine), and TAPC (4,4'-cyclohexylidenebis[N,N-bis(4-methylphenyl) benzenamine]) sensors with the same cylindrical nanopore structures. The TFB sensor outstands the others in sensitivity and lifetime and it shows a sensing response (current variation ratio) of 13% to 100 ppb ammonia after 64 days of storage in air. A repeated sensing periods testing and a long-term measurement have also been demonstrated for the test of robustness. The performance of the TFB sensor is stable in both tests, which reveals that the TFB sensor can be utilized in our targeting clinical trials. In the last part of this work, we study the change of ammonia concentration in the breath of hemodialysis (HD) patients before and after dialysis. An obvious drop of breath ammonia concentration can be observed after dialysis. The reduction of breath ammonia is also correlated with the reduction of blood urea nitrogen (BUN). A correlation coefficient of 0.82 is achieved. The result implies that TFB sensor may be used as a real-time and low cost breath ammonia sensor for the daily tracking of hemodialysis patients.
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Affiliation(s)
| | - Chang-Chiang Chen
- Department
of Internal Medicine, Division of Nephrology, National Taiwan University Hospital Hsin-Chu Branch, 25, Ln. 442, Sec. 1, Jingguo Rd., 300 Hsinchu, Taiwan
| | | | | | - Chia-Jung Lu
- Department
of Chemistry, National Taiwan Normal University, 162, Heping East Rd., Section 1, 106 Taipei, Taiwan
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20
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Lin HY, Sher CW, Lin CH, Tu HH, Chen XY, Lai YC, Lin CC, Chen HM, Yu P, Meng HF, Chi GC, Honjo K, Chen TM, Kuo HC. Fabrication of Flexible White Light-Emitting Diodes from Photoluminescent Polymer Materials with Excellent Color Quality. ACS Appl Mater Interfaces 2017; 9:35279-35286. [PMID: 28891282 DOI: 10.1021/acsami.7b03386] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This study developed flexible light-emitting diodes (LEDs) with warm white and neutral white light. A simple ultraviolet flip-chip sticking process was adopted for the pumping source and combined with polymer and quantum dot (QD) films technology to yield white light. The polymer-blended flexible LEDs exhibited higher luminous efficiency than the QD-blended flexible LEDs. Moreover, the polymer-blended LEDs achieved excellent color-rendering index (CRI) values (Ra = 96 and R9 = 96), with high reliability, demonstrating high suitability for special applications like accent, down, or retrofit lights in the future. In places such as a museum, kitchen, or surgery room, its high R9 and high CRI characteristics can provide high-quality services.
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Affiliation(s)
| | - Chin-Wei Sher
- Hong Kong University of Science and Technology , Clear Water Bay, Kowloon, Hong Kong
| | | | | | | | | | - Chien-Chung Lin
- Institute of Photonic System, National Chiao Tung University , Tainan, Taiwan 711
| | | | | | | | | | - Keiji Honjo
- ICE Cube Center WOW 3DI Laboratory, Rm. 307, Bldg. J3, 4259 Nagatsuta-cho, Midori-ku Yokohama, Kanagawa Japan
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21
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Tsai PT, Lin KC, Wu CY, Liao CH, Lin MC, Wong YQ, Meng HF, Chang CY, Wang CL, Huang YF, Horng SF, Zan HW, Chao YC. Toward Long-Term Stable and Efficient Large-Area Organic Solar Cells. ChemSusChem 2017; 10:2778-2787. [PMID: 28516516 DOI: 10.1002/cssc.201700601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 05/09/2017] [Indexed: 06/07/2023]
Abstract
Here, we report that long-term stable and efficient organic solar cells (OSCs) can be obtained through the following strategies: i) combination of rapid-drying blade-coating deposition with an appropriate thermal annealing treatment to obtain an optimized morphology of the active layer; ii) insertion of interfacial layers to optimize the interfacial properties. The resulting devices based on poly[4,8-bis(5-(2-ethylhexyl)thiophen-2-yl)benzo[1,2-b;4,5-b']dithiophene-2,6-diyl-alt-(4-(2-ethylhexyl)-3-fluorothieno[3,4-b]thiophene-2-carboxylate-2,6-diyl)] (PBDTTT-EFT):[6,6]-phenyl C71 butyric acid methyl ester (PC71 BM) blend as the active layer exhibits a power conversion efficiency (PCE) up to 9.57 %, which represents the highest efficiency ever reported for blade-coated OSCs. Importantly, the conventional structure devices based on poly(3-hexylthiophene) (P3HT):phenyl-C61 -butyric acid methyl ester (PCBM) blend can retain approximately 65 % of their initial PCE for almost 2 years under operating conditions, which is the best result ever reported for long-term stable OSCs under operational conditions. More encouragingly, long-term stable large-area OSCs (active area=216 cm2 ) based on P3HT:PCBM blend are also demonstrated. Our findings represent an important step toward the development of large-area OSCs with high performance and long-term stability.
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Affiliation(s)
- Pei-Ting Tsai
- Institute of Physics, National Chiao Tung University, 1001 University Road, Hsinchu, 300, Taiwan
| | - Kuan-Chu Lin
- Institute of Electronic Engineering, National Tsing Hua University, 101, Section 2, Kuang Fu Road, Hsinchu, 300, Taiwan
| | - Cheng-Yu Wu
- Institute of Physics, National Chiao Tung University, 1001 University Road, Hsinchu, 300, Taiwan
| | - Chung-Hung Liao
- Institute of Electronic Engineering, National Tsing Hua University, 101, Section 2, Kuang Fu Road, Hsinchu, 300, Taiwan
| | - Man-Chun Lin
- Institute of Electronic Engineering, National Tsing Hua University, 101, Section 2, Kuang Fu Road, Hsinchu, 300, Taiwan
| | - Ying Qian Wong
- Faculty of Engineering, Multimedia University, Cyberjaya, 63100, Malaysia
| | - Hsin-Fei Meng
- Institute of Physics, National Chiao Tung University, 1001 University Road, Hsinchu, 300, Taiwan
| | - Chih-Yu Chang
- Department of Materials Science and Engineering, Feng Chia University, 100 Wen hwa Road, Taichung, 40724, Taiwan
| | - Chien-Lung Wang
- Department of Applied Chemistry, National Chiao Tung University, 1001 University Road, Hsinchu, 300, Taiwan
| | - Yi-Fan Huang
- Department of Applied Chemistry, National Chiao Tung University, 1001 University Road, Hsinchu, 300, Taiwan
| | - Sheng-Fu Horng
- Institute of Electronic Engineering, National Tsing Hua University, 101, Section 2, Kuang Fu Road, Hsinchu, 300, Taiwan
| | - Hsiao-Wen Zan
- Deparment of Photonics, National Chiao Tung University, 1001 University Road, Hsinchu, 300, Taiwan
| | - Yu-Chiang Chao
- Department of Physics, Chung Yuan Christian University, 200 Chung Pei Road, Chung Li, 32023, Taiwan
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Chang LY, Chuang MY, Zan HW, Meng HF, Lu CJ, Yeh PH, Chen JN. One-Minute Fish Freshness Evaluation by Testing the Volatile Amine Gas with an Ultrasensitive Porous-Electrode-Capped Organic Gas Sensor System. ACS Sens 2017; 2:531-539. [PMID: 28723177 DOI: 10.1021/acssensors.6b00829] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
In this work, we successfully demonstrate a fast method to determine the fish freshness by using a sensing system containing an ultrasensitive amine gas sensor to detect the volatile amine gas from the raw fish meat. When traditional titration method takes 4 h and complicated steps to test the total volatile basic nitrogen (TVB-N) as a worldwide standard for fish freshness, our sensor takes 1 min to deliver an electrical sensing response that is highly correlated with the TVB-N value. When detecting a fresh fish with a TVB-N as 18 mg/100 g, the sensor delivers an effective ammonia concentration as 100 ppb. For TVB-N as 28-35 mg/100 g, a well-accepted freshness limit, the effective ammonia concentration is as 200-300 ppb. The ppb-regime sensitivity of the sensor and the humidity control in the sensing system are the keys to realizing fast and accurate detection. It is expected that the results in this report enable the development of on-site freshness detection and real-time monitoring in a fish factory.
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Affiliation(s)
| | | | | | | | - Chia-Jung Lu
- Department
of Chemistry, National Taiwan Normal University, 162, Heping East Rd., Section 1, 106 Taipei, Taiwan
| | - Ping-Hung Yeh
- Department
of Physics, Tamkang University, 151, Yingzhuan Rd., Tamsui District, 25137 New Taipei
City, Taiwan
| | - Jian-Nan Chen
- Institute
of Electronics Engineering, National Tsing Hua University, 101,
Kuang-Fu Rd., Section 2, 300 Hsinchu, Taiwan
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23
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Lai YC, Chang YF, Tsai PT, Chang JK, Tseng WH, Lin YC, Hsiao CY, Zan HW, Wu CI, Chi GC, Meng HF, Yu P. Rear interface engineering of hybrid organic-silicon nanowire solar cells via blade coating. Opt Express 2016; 24:A414-A423. [PMID: 26832593 DOI: 10.1364/oe.24.00a414] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
In this work, we investigate blade-coated organic interlayers at the rear surface of hybrid organic-silicon photovoltaics based on two small molecules: Tris(8-hydroxyquinolinato) aluminium (Alq(3)) and 1,3-bis(2-(4-tert-butylphenyl)-1,3,4-oxadiazol-5-yl) benzene (OXD-7). In particular, soluble Alq(3) resulting in a uniform thin film with a root-mean-square roughness < 0.2nm is demonstrated for the first time. Both devices with the Alq(3) and OXD-7 interlayers show notable enhancement in the open-circuit voltage and fill-factor, leading to a net efficiency increase by over 2% from the reference, up to 11.8% and 12.5% respectively. The capacitance-voltage characteristics confirm the role of the small-molecule interlayers resembling a thin interfacial oxide layer for the Al-Si Schottky barrier to enhance the built-in potential and facilitate charge transport. Moreover, the Alq(3) interlayer in optimized devices exhibits isolated phases with a large surface roughness, in contrast to the OXD-7 which forms a continuous uniform thin film. The distinct morphological differences between the two interlayers further suggest different enhancement mechanisms and hence offer versatile functionalities to the advent of hybrid organic-silicon photovoltaics.
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24
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Chen YM, Lai YY, Chao YC, Zan HW, Meng HF, Horng SF, Chang CH. Large-Area Nano-patterning and Fabrication of Vertical Transistor Array by Non-close-packed Polystyrene Spheres. ACS Appl Mater Interfaces 2015; 7:18899-18903. [PMID: 26278552 DOI: 10.1021/acsami.5b03724] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
We demonstrated a large-area nanopatterning technique with the help of a non-close-packed PS sphere layer over a large-area substrate. The non-close-packed PS sphere layer is fabricated by blade coating method. It was demonstrated that non-close-packed PS spheres can be achieved within an area of 18 cm × 25 cm on a rigid glass substrate and within an area of 10 cm × 10 cm on a flexible substrate. We also demonstrated that the blade-coated non-close-packed PS sphere layer was suitable for the mass production of vertical organic transistors over a large area.
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Affiliation(s)
| | | | - Yu-Chiang Chao
- Department of Physics and Center for Nanotechnology, Chung Yuan Christian University , Chung-Li 32023, Taiwan
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25
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Chen KJ, Lai YC, Lin BC, Lin CC, Chiu SH, Tu ZY, Shih MH, Yu P, Lee PT, Li X, Meng HF, Chi GC, Chen TM, Kuo HC. Efficient hybrid white light-emitting diodes by organic-inorganic materials at different CCT from 3000K to 9000K. Opt Express 2015; 23:A204-10. [PMID: 25968786 DOI: 10.1364/oe.23.00a204] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
The hybrid white light-emitting didoes (LED) with polyfluoren (PFO) polymer and quantum dot (QD) was investigated using dispensing method at the different correlated color temperature (CCT) for cool and warm color temperature. This result indicates that the hybrid white LED device has the higher luminous efficiency than the convention one, which could be attributed to the increased utilization rate of the UV light. Furthermore, the CIE 1931 coordinate of high quality white hybrid LED with different CCT range from 3000K to 9000K is demonstrated. Consequently, the angular-dependent CCT and the thermal issue of the hybrid white LED device were also analyzed in this study.
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26
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Yu P, Tsai CY, Chang JK, Lai CC, Chen PH, Lai YC, Tsai PT, Li MC, Pan HT, Huang YY, Wu CI, Chueh YL, Chen SW, Du CH, Horng SF, Meng HF. 13% efficiency hybrid organic/silicon-nanowire heterojunction solar cell via interface engineering. ACS Nano 2013; 7:10780-7. [PMID: 24224917 DOI: 10.1021/nn403982b] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
Interface carrier recombination currently hinders the performance of hybrid organic-silicon heterojunction solar cells for high-efficiency low-cost photovoltaics. Here, we introduce an intermediate 1,1-bis[(di-4-tolylamino)phenyl]cyclohexane (TAPC) layer into hybrid heterojunction solar cells based on silicon nanowires (SiNWs) and conjugate polymer poly(3,4-ethylenedioxy-thiophene):poly(styrenesulfonate) (PEDOT:PSS). The highest power conversion efficiency reaches a record 13.01%, which is largely ascribed to the modified organic surface morphology and suppressed saturation current that boost the open-circuit voltage and fill factor. We show that the insertion of TAPC increases the minority carrier lifetime because of an energy offset at the heterojunction interface. Furthermore, X-ray photoemission spectroscopy reveals that TAPC can effectively block the strong oxidation reaction occurring between PEDOT:PSS and silicon, which improves the device characteristics and assurances for reliability. These learnings point toward future directions for versatile interface engineering techniques for the attainment of highly efficient hybrid photovoltaics.
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Affiliation(s)
- Peichen Yu
- Department of Photonics and Institute of Electro-Optical Engineering, National Chiao-Tung University , Hsinchu 30010, Taiwan
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27
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Dai MZ, Lin YL, Lin HC, Zan HW, Chang KT, Meng HF, Liao JW, Tsai MJ, Cheng H. Highly Sensitive Ammonia Sensor with Organic Vertical Nanojunctions for Noninvasive Detection of Hepatic Injury. Anal Chem 2013; 85:3110-7. [DOI: 10.1021/ac303100k] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Ming-Zhi Dai
- Institute of Physics, National Chiao Tung University, Hsinchu, Taiwan
| | - Yi-Lo Lin
- Graduate Institute of Veterinary
Pathobiology, College of Veterinary Medicine, National Chung Hsing University, Taichung, Taiwan
- Neural Regeneration Laboratory,
Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Hung-Cheng Lin
- Department of Photonics, National Chiao Tung University, Hsinchu, Taiwan
| | - Hsiao-Wen Zan
- Department of Photonics, National Chiao Tung University, Hsinchu, Taiwan
| | - Kai-Ting Chang
- Neural Regeneration Laboratory,
Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
- Department and Institute of
Pharmacology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
| | - Hsin-Fei Meng
- Institute of Physics, National Chiao Tung University, Hsinchu, Taiwan
| | - Jiunn-Wang Liao
- Graduate Institute of Veterinary
Pathobiology, College of Veterinary Medicine, National Chung Hsing University, Taichung, Taiwan
| | - May-Jywan Tsai
- Neural Regeneration Laboratory,
Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
| | - Henrich Cheng
- Neural Regeneration Laboratory,
Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
- Department and Institute of
Pharmacology, School of Medicine, National Yang-Ming University, Taipei, Taiwan
- Center for Neural Regeneration,
Department of Neurosurgery, Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan
- Brain Research Center, School
of Medicine, National Yang-Ming University, Taipei, Taiwan
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Chen TG, Huang BY, Liu HW, Huang YY, Pan HT, Meng HF, Yu P. Flexible silver nanowire meshes for high-efficiency microtextured organic-silicon hybrid photovoltaics. ACS Appl Mater Interfaces 2012; 4:6857-64. [PMID: 23167527 DOI: 10.1021/am302011u] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Hybrid organic-silicon heterojunction solar cells promise a significant reduction on fabrication costs by avoiding energy-intensive processes. However, their scalability remains challenging without a low-cost transparent electrode. In this work, we present solution-processed silver-nanowire meshes that uniformly cover the microtextured surface of hybrid heterojunction solar cells to enable efficient carrier collection for large device area. We systematically compare the characteristics and device performance with long and short nanowires with an average length/diameter of 30 μm/115 nm and 15 μm/45 nm, respectively, to those with silver metal grids. A remarkable power conversion efficiency of 10.1% is achieved with a device area of 1 × 1 cm(2) under 100 mW/cm(2) of AM1.5G illumination for the hybrid solar cells employing long wires, which represents an enhancement factor of up to 36.5% compared to the metal grid counterpart. The high-quality nanowire network displays an excellent spatial uniformity of photocurrent generation via distributed nanowire meshes and low dependence on efficient charge transport under a high light-injection condition with increased device area. The capability of silver nanowires as flexible transparent electrodes presents a great opportunity to accelerate the mass deployment of high-efficiency hybrid silicon photovoltaics via simple and rapid soluble processes.
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Affiliation(s)
- Ting-Gang Chen
- Department of Photonics and Institute of Electro-Optical Engineering, National Chiao-Tung University, Hsinchu, Taiwan, ROC
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29
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Zan HW, Yeh CC, Meng HF, Tsai CC, Chen LH. Achieving high field-effect mobility in amorphous indium-gallium-zinc oxide by capping a strong reduction layer. Adv Mater 2012; 24:3509-14. [PMID: 22678659 DOI: 10.1002/adma.201200683] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Revised: 04/03/2012] [Indexed: 05/26/2023]
Abstract
An effective approach to reduce defects and increase electron mobility in a-IGZO thin-film transistors (a-IGZO TFTs) is introduced. A strong reduction layer, calcium, is capped onto the back interface of a-IGZO TFT. After calcium capping, the effective electron mobility of a-IGZO TFT increases from 12 cm(2) V(-1) s(-1) to 160 cm(2) V(-1) s(-1). This high mobility is a new record, which implies that the proposed defect reduction effect is key to improve electron transport in oxide semiconductor materials.
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Affiliation(s)
- Hsiao-Wen Zan
- Department of Photonics and Institute of Electro-Optical Engineering, National Chiao Tung University, 1001, Ta-Hsueh Rd, HsinChu, 300, Taiwan.
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Wang JC, Lu CY, Hsu JL, Lee MK, Hong YR, Perng TP, Horng SF, Meng HF. Efficient inverted organic solar cells without an electron selective layer. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm04269b] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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31
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Tsai JH, Chueh CC, Chen WC, Yu CY, Hwang GW, Ting C, Chen EC, Meng HF. New thiophene-phenylene-thiophene acceptor random conjugated copolymers for optoelectronic applications. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.24002] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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32
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Wang JC, Weng WT, Tsai MY, Lee MK, Horng SF, Perng TP, Kei CC, Yu CC, Meng HF. Highly efficient flexible inverted organic solar cells using atomic layer deposited ZnO as electron selective layer. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/b921396a] [Citation(s) in RCA: 202] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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33
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Lee CW, Yang SH, Hsu CS, Meng HF. Improved efficiencies in organic light emitting diodes made with CdSe/ZnS quantum dots and a semiconducting polymer. J Nanosci Nanotechnol 2009; 9:2076-2080. [PMID: 19435084 DOI: 10.1166/jnn.2009.419] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In this study, we report the fabrication and characterization of organic/inorganic hybrid polymer light emitting diodes (PLEDs) made with ZnS-capped CdSe core/shell type nanocrystals and a light-emitting polymer poly[2-phenyl-3-(9,9-dihexylfluoren-2-yl)-1,4-phenylene vinylene]-co-[2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylene vinylene]. The device using pristine polymer as active layer emitted yellow light with a maximum brightness of 3949 cd/m2 and maximum external quantum efficiency of 0.27 cd/A at 10 V. After blending with the CdSe/ZnS quantum dots (QDs), the device showed a much higher brightness of 8192 cd/m2 and external quantum efficiency of 1.27 cd/A at 7 V, while the driving voltage was lowered. The experimental results revealed that CdSe/ZnS QDs act as a hole-blocker in the devices. More efficient electron-hole recombination process inside polymer layer results in large improvement in luminescence and efficiency.
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Affiliation(s)
- Chih-Wen Lee
- Department of Applied Chemistry, National Chiao Tung University, Hsinchu 300, Taiwan, Republic of China
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34
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Lin LC, Meng HF, Shy JT, Horng SF, Yu LS, Chen CH, Liaw HH, Huang CC, Peng KY, Chen SA. Triplet-to-singlet exciton formation in poly(p-phenylene-vinylene) light-emitting diodes. Phys Rev Lett 2003; 90:036601. [PMID: 12570513 DOI: 10.1103/physrevlett.90.036601] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2002] [Indexed: 05/24/2023]
Abstract
The triplet to singlet exciton formation ratio in a MEH-PPV light-emitting diode is measured by comparing the triplet-induced absorptions with optical and electric excitations at the same singlet exciton density. The ratio is a strong universal decreasing function of the averaged electric field. Using 4 ns for singlet to triplet intersystem crossing time, the ratio is significantly larger than the spin-independent value 3 at intermediate field but is reduced to about 2 for higher field.
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Affiliation(s)
- L C Lin
- Institute of Physics, National Chiao Tung University, Hsinchu 300, Taiwan, Republic of China
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35
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Hsu JH, Fann W, Meng HF, Chen ES, Chang EC, Chen SA, To KW. Decay dynamics of interchain excited states in luminescent conjugated polymer CN-PPV. Chem Phys 2001. [DOI: 10.1016/s0301-0104(01)00353-6] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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36
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Lai CM, Meng HF. Bipolaron-induced third-order optical nonlinearity in conjugated conducting polymers. Phys Rev B Condens Matter 1996; 54:16365-16368. [PMID: 9985745 DOI: 10.1103/physrevb.54.16365] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/12/2023]
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37
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Meng HF. Sub-Poisson photoelectron statistics in saturated light absorption. Phys Rev A 1995; 52:3239-3243. [PMID: 9912611 DOI: 10.1103/physreva.52.3239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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38
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39
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Meng HF, Cohen EG. Growth, self-randomization, and propagation in a Lorentz lattice gas. Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics 1994; 50:2482-2487. [PMID: 9962282 DOI: 10.1103/physreve.50.2482] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
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Huang K, Meng HF. Huang and Meng reply. Phys Rev Lett 1993; 70:1564. [PMID: 10053326 DOI: 10.1103/physrevlett.70.1564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
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43
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