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Park S, Jillella R, Kwon H, Park S, Lee H, Lee K, Park J. Enhancement of Optical and Chemical Resistance Properties with a Novel Yellow Quinophthalone Derivative for Image Sensor Colorants. Molecules 2024; 29:1100. [PMID: 38474616 DOI: 10.3390/molecules29051100] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2024] [Revised: 02/26/2024] [Accepted: 02/27/2024] [Indexed: 03/14/2024] Open
Abstract
A novel quinophthalone derivative, 4,5,6,7-tetrachloro-2-(2-(3-hydroxy-1-oxo-1H-cyclopenta[b]naphthalen-2-yl)quinolin-4-yl)isoindoline-1,3-dione (TCHCQ), was designed and synthesized as a yellow colorant additive for green color filters in image sensors. The characteristics of the new material were evaluated in terms of optical, thermal, and chemical properties under solution and color filter film conditions. TCHCQ exhibited a significantly enhanced molar extinction coefficient in solution, being 1.21 times higher than that of the commercially used yellow colorant Y138. It also demonstrated excellent thermal stability, with a decomposition temperature (Td) exceeding 450 °C. Utilizing the nano-pigmentation process, TCHCQ was used to prepare nano-sized particles with an excellent average size of 35 nm. This enabled the fabrication of a color filter film with outstanding properties. The optical properties of the produced film revealed outstanding yellow colorant transmittance of 0.97% at 435 nm and 91.2% at 530 nm. The color filter film exhibited similar optical and thermal stability to Y138, with an improved chemical stability, as evidenced by a ΔEab value of 0.52. The newly synthesized TCHCQ is considered a promising candidate for use as a yellow colorant additive in image sensor color filters, demonstrating superior optical, thermal, and chemical stability.
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Affiliation(s)
- Sunwoo Park
- Integrated Engineering, Department of Chemical Engineering, Kyung Hee University, Gyeonggi 17104, Republic of Korea
| | - Raveendra Jillella
- Integrated Engineering, Department of Chemical Engineering, Kyung Hee University, Gyeonggi 17104, Republic of Korea
| | - Hyukmin Kwon
- Integrated Engineering, Department of Chemical Engineering, Kyung Hee University, Gyeonggi 17104, Republic of Korea
| | - Sangwook Park
- Integrated Engineering, Department of Chemical Engineering, Kyung Hee University, Gyeonggi 17104, Republic of Korea
| | - Hayoon Lee
- Integrated Engineering, Department of Chemical Engineering, Kyung Hee University, Gyeonggi 17104, Republic of Korea
| | - Kiho Lee
- Integrated Engineering, Department of Chemical Engineering, Kyung Hee University, Gyeonggi 17104, Republic of Korea
| | - Jongwook Park
- Integrated Engineering, Department of Chemical Engineering, Kyung Hee University, Gyeonggi 17104, Republic of Korea
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Huang YJ, Chang WH, Chen YJ, Lin CH. Synthesis of Metal/SU-8 Nanocomposites through Photoreduction on SU-8 Substrates. Nanomaterials (Basel) 2023; 13:nano13111784. [PMID: 37299687 DOI: 10.3390/nano13111784] [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] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 05/29/2023] [Accepted: 05/30/2023] [Indexed: 06/12/2023]
Abstract
The paper presents a simple, fast, and cost-effective method for creating metal/SU-8 nanocomposites by applying a metal precursor drop onto the surface or nanostructure of SU-8 and exposing it to UV light. No pre-mixing of the metal precursor with the SU-8 polymer or pre-synthesis of metal nanoparticles is required. A TEM analysis was conducted to confirm the composition and depth distribution of the silver nanoparticles, which penetrate the SU-8 film and uniformly form the Ag/SU-8 nanocomposites. The antibacterial properties of the nanocomposites were evaluated. Moreover, a composite surface with a top layer of gold nanodisks and a bottom layer of Ag/SU-8 nanocomposites was produced using the same photoreduction process with gold and silver precursors, respectively. The reduction parameters can be manipulated to customize the color and spectrum of various composite surfaces.
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Affiliation(s)
- Yan-Jun Huang
- Department of Photonics, National Cheng Kung University, Tainan 70101, Taiwan
| | - Wen-Huei Chang
- Department of Applied Chemistry, National Pingtung University, Pingtung 90003, Taiwan
| | - Yi-Jui Chen
- Department of Photonics, National Cheng Kung University, Tainan 70101, Taiwan
| | - Chun-Hung Lin
- Department of Photonics, National Cheng Kung University, Tainan 70101, Taiwan
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Zhou F, Lan R, Li Z, Liu B, Xie Q, Bao J, Liu J, Gao P, Yang H, Zhang Y, Liu Z. Graphene/Cholesteric Liquid-Crystal-Based Electro-Driven Thermochromic Light Modulators toward Wide-Gamut Dynamic Light Color-Tuning-Related Applications. Nano Lett 2023; 23:4617-4626. [PMID: 37161990 DOI: 10.1021/acs.nanolett.3c01118] [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] [Indexed: 05/11/2023]
Abstract
Light filters are ubiquitous in projection and display techniques, illumination engineering, image sensing, photography, etc., while those enabling wide-gamut dynamic light color tuning are still lacking. Herein, by combining the electro-heating capability of graphene and unique optical properties (thermochromism and circular dichroism) of small-molecule-weight cholesteric liquid crystal (ChLC), a brand-new thermochromic light modulator is constructed as actively tunable color filter. Transparent graphene/glass hybrid with reasonably high conductivity serves both as a high-performance heater for actuating the thermochromism of temperature-responsive ChLC and as neutral light attenuator for brightness control. Thanks to the temperature- and polarization-dependent spectral properties of the ChLC, widely tunable hue and saturation properties of transmission light color are achieved, respectively. Several intriguing applications, e.g., color-variable smart windows for backlight color tuning and color-variable filters for photography, are also demonstrated. This work hereby provides new paradigms for promoting the applications of graphene/ChLC-based light modulators in next-generation light-management-related scenarios.
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Affiliation(s)
- Fan Zhou
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, P. R. China
- School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China
- Beijing Graphene Institute (BGI), Beijing 100095, P. R. China
| | - Ruochen Lan
- School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China
- Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, P. R. China
- Institute of Advanced Materials, Key Lab of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education, Jiangxi Normal University, Nanchang 330022, P. R. China
| | - Zhi Li
- Beijing Graphene Institute (BGI), Beijing 100095, P. R. China
| | - Bingyao Liu
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, P. R. China
- Electron Microscopy Laboratory and International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, P. R. China
| | - Qin Xie
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, P. R. China
- Beijing Graphene Institute (BGI), Beijing 100095, P. R. China
| | - Jinying Bao
- School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China
- Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, P. R. China
| | - Junling Liu
- Beijing Graphene Institute (BGI), Beijing 100095, P. R. China
| | - Peng Gao
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, P. R. China
- Beijing Graphene Institute (BGI), Beijing 100095, P. R. China
- Electron Microscopy Laboratory and International Center for Quantum Materials, School of Physics, Peking University, Beijing 100871, P. R. China
- Collaborative Innovation Center of Quantum Matter, Beijing 100871, P. R. China
| | - Huai Yang
- School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China
- Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, Peking University, Beijing 100871, P. R. China
| | - Yanfeng Zhang
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, P. R. China
- School of Materials Science and Engineering, Peking University, Beijing 100871, P. R. China
- Beijing Graphene Institute (BGI), Beijing 100095, P. R. China
| | - Zhongfan Liu
- Academy for Advanced Interdisciplinary Studies, Peking University, Beijing 100871, P. R. China
- Beijing Graphene Institute (BGI), Beijing 100095, P. R. China
- Center for Nanochemistry, Beijing Science and Engineering Center for Nanocarbons, Beijing National Laboratory for Molecular Sciences, College of Chemistry and Molecular Engineering, Peking University, Beijing 100871, P. R. China
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Sandali O, El Sanharawi M, Tahiri Joutei Hassani R, Armia Balamoun A, Duliere C, Ezzouhairi SM, Sallam AB, Borderie V. Use of Digital Methods to Optimize Visualization during Surgical Gonioscopy. J Clin Med 2023; 12:jcm12082794. [PMID: 37109131 PMCID: PMC10146903 DOI: 10.3390/jcm12082794] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2023] [Revised: 03/17/2023] [Accepted: 03/31/2023] [Indexed: 04/29/2023] Open
Abstract
Purpose: The aim of this study was to evaluate the efficacy of digital visualization for enhancing the visualization of iridocorneal structures during surgical gonioscopy. Methods: This was a prospective, single-center study on a series of 26 cases of trabecular stent implantation performed by the same surgeon. Images were recorded during surgical gonioscopy, and before stent implantation, with standard colors and with the optimization of various settings, principally color saturation and temperature and the use of the cyan color filter. Subjective analyses were performed by two glaucoma surgeons, and objective contrast measurements were made on iridocorneal structure images. Results: The surgeons evaluating the images considered the optimized digital settings to produce enhanced tissue visibility for both trabecular meshwork pigmentation and Schlemm's canal in more than 65% of cases. The mean difference in the standard deviation of the pixel intensity values was 37.87 (±4.61) for the optimized filter images and 32.37 (±3.51) for the standard-color images (p < 0.001). The use of a cyan filter provided a good level of contrast for the visualization of trabecular meshwork pigmentation. Increasing the color temperature highlighted the red appearance of Schlemm's canal. Conclusions: We report here the utility of optimized digital settings including the cyan filter and a warmer color for enhancing the visualization of iridocorneal structures during surgical gonioscopy. These settings could be used in surgical practice to enhance the visualization of the trabecular meshwork and Schlemm's canal during minimally invasive glaucoma surgery.
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Affiliation(s)
- Otman Sandali
- Centre Hospitalier National d'Ophtalmologie des XV-XX, 28 Rue de Charenton, 75571 Paris, France
- Service de Chirurgie Ambulatoire, Hôpital Guillaume-de-Varye, 18230 Bourges, France
| | - Mohamed El Sanharawi
- Service d'Ophtalmologie, Centre Hospitalier de Châteaudun, 28200 Châteaudun, France
| | | | - Ashraf Armia Balamoun
- Watany Eye Hospital, Cairo 11775, Egypt
- Watany Research and Development Centre, Cairo 11775, Egypt
- Ashraf Armia Eye Clinic, Giza 12655, Egypt
| | | | | | - Ahmed B Sallam
- Department of Ophthalmology, Harvey and Bernice Jones Eye Institute, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Vincent Borderie
- Centre Hospitalier National d'Ophtalmologie des XV-XX, 28 Rue de Charenton, 75571 Paris, France
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Ahn J, Gu J, Jeong Y, Ha JH, Ko J, Kang B, Hwang SH, Park J, Jeon S, Kim H, Jeong JH, Park I. Nanotransfer-on-Things: From Rigid to Stretchable Nanophotonic Devices. ACS Nano 2023; 17:5935-5942. [PMID: 36916819 DOI: 10.1021/acsnano.3c00025] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [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
The growing demand for nanophotonic devices has driven the advancement of nanotransfer printing (nTP) technology. Currently, the scope of nTP is limited to certain materials and substrates owing to the temperature, pressure, and chemical bonding requirements. In this study, we developed a universal nTP technique utilizing covalent bonding-based adhesives to improve the adhesion between the target material and substrate. Additionally, the technique employed plasma-based selective etching to weaken the adhesion between the mold and target material, thereby enabling the reliable modulation of the relative adhesion forces, regardless of the material or substrate. The technique was evaluated by printing four optical materials on nine substrates, including rigid, flexible, and stretchable substrates. Finally, its applicability was demonstrated by fabricating a ring hologram, a flexible plasmonic color filter, and extraordinary optical transmission-based strain sensors. The high accuracy and reliability of the proposed nTP method were verified by the performance of nanophotonic devices that closely matched numerical simulation results.
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Affiliation(s)
- Junseong Ahn
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Department of Nano Manufacturing Technology, Korea Institute of Machinery and Materials (KIMM), Daejeon 34103, Republic of Korea
| | - Jimin Gu
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Yongrok Jeong
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Department of Nano Manufacturing Technology, Korea Institute of Machinery and Materials (KIMM), Daejeon 34103, Republic of Korea
| | - Ji-Hwan Ha
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Department of Nano Manufacturing Technology, Korea Institute of Machinery and Materials (KIMM), Daejeon 34103, Republic of Korea
| | - Jiwoo Ko
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Byeongmin Kang
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
- Department of Nano Manufacturing Technology, Korea Institute of Machinery and Materials (KIMM), Daejeon 34103, Republic of Korea
| | - Soon Hyoung Hwang
- Department of Nano Manufacturing Technology, Korea Institute of Machinery and Materials (KIMM), Daejeon 34103, Republic of Korea
| | - Jaeho Park
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Sohee Jeon
- Department of Nano Manufacturing Technology, Korea Institute of Machinery and Materials (KIMM), Daejeon 34103, Republic of Korea
| | - Hwi Kim
- Department of Electronics and Information Engineering, Korea University, Sejong 30019, Republic of Korea
| | - Jun-Ho Jeong
- Department of Nano Manufacturing Technology, Korea Institute of Machinery and Materials (KIMM), Daejeon 34103, Republic of Korea
| | - Inkyu Park
- Department of Mechanical Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
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Park S, Kang Y, Kwon H, Kim H, Kang S, Lee H, Yoon C, Park J. Novel Yellow Azo Pyridone Derivatives with Different Halide Atoms for Image-Sensor Color Filters. Molecules 2022; 27:6601. [PMID: 36235139 PMCID: PMC9572834 DOI: 10.3390/molecules27196601] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 10/01/2022] [Accepted: 10/02/2022] [Indexed: 11/30/2022] Open
Abstract
Novel yellow azo pyridone dye derivatives were synthesized for use in image-sensor color filters. The synthesized compounds have a basic chemical structure composed of azo, hydroxy, amide, and nitrile groups as well as different halide groups. New materials were evaluated on the basis of their optical, thermal, and surface properties under conditions mimicking those of a commercial device fabrication process. A comparison of their related performance revealed that, among the four prepared compounds, 5-((4,6-dichlorocyclohexa-2,4-dien-1-yl)diazenyl)-6-hydroxy-1,4-dimethyl-2-oxo-1,2-dihydropyridine-3-carbonitrile (Cl-PAMOPC) exhibited the best performance as an image-sensor color filter material, including a solubility greater than 0.1 wt% in propylene glycol monomethyl ether acetate solvent, a high decomposition temperature of 263 °C, and stable color difference values of 4.93 and 3.88 after a thermal treatment and a solvent-resistance test, respectively. The results suggest that Cl-PAMOPC can be used as a green dye additive in an image-sensor colorant.
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Affiliation(s)
- Sunwoo Park
- Integrated Engineering, Department of Chemical Engineering, Kyung Hee University, Yongin 17104, Korea
| | - Yuna Kang
- Integrated Engineering, Department of Chemical Engineering, Kyung Hee University, Yongin 17104, Korea
| | - Hyukmin Kwon
- Integrated Engineering, Department of Chemical Engineering, Kyung Hee University, Yongin 17104, Korea
| | - Hayeon Kim
- Integrated Engineering, Department of Chemical Engineering, Kyung Hee University, Yongin 17104, Korea
| | - Seokwoo Kang
- Integrated Engineering, Department of Chemical Engineering, Kyung Hee University, Yongin 17104, Korea
| | - Hayoon Lee
- Integrated Engineering, Department of Chemical Engineering, Kyung Hee University, Yongin 17104, Korea
| | - Chun Yoon
- Department of Chemistry, Sejong University, 98 Gunja-dong, Gwangjin-gu, Seoul 143-747, Korea
| | - Jongwook Park
- Integrated Engineering, Department of Chemical Engineering, Kyung Hee University, Yongin 17104, Korea
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Fan X, Wang S, Xu D, Zheng G. Ultra-Thin and Lithography-Free Transmissive Color Filter Based on Doped Indium Gallium Zinc Oxide with High Performance. Micromachines (Basel) 2022; 13:1228. [PMID: 36014150 PMCID: PMC9415859 DOI: 10.3390/mi13081228] [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] [Figures] [Subscribe] [Scholar Register] [Received: 06/14/2022] [Revised: 07/24/2022] [Accepted: 07/28/2022] [Indexed: 06/15/2023]
Abstract
A kind of ultra-thin transmissive color filter based on a metal-semiconductor-metal (MSM) structure is proposed. The displayed color can cover the entire visible range and switches after H2 treatment. An indium gallium zinc oxide (IGZO) semiconductor was employed, as the concentration of charge carriers can be controlled to adjust the refractive index and achieve certain colors. The color modulation in the designed structure was verified using the rigorous coupled wave analysis (RCWA) method. The angular independence of the relative transmission could reach up to 60°, and polarization-insensitive performance could also be maintained. Numerical results demonstrated that the thickness of IGZO was the key parameter to concentrate the incident light. The overall structure is planar and lithography-free and can be produced with simple preparation steps. The obtained results can also be extended to other similar resonators where a proper cavity allows dynamical functionality.
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Affiliation(s)
- Xiangrui Fan
- School of Electronics & Information Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China;
| | - Shengyao Wang
- Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology (CICAEET), Nanjing University of Information Science & Technology, Nanjing 210044, China; (S.W.); (D.X.)
| | - Dongdong Xu
- Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology (CICAEET), Nanjing University of Information Science & Technology, Nanjing 210044, China; (S.W.); (D.X.)
| | - Gaige Zheng
- Jiangsu Collaborative Innovation Center on Atmospheric Environment and Equipment Technology (CICAEET), Nanjing University of Information Science & Technology, Nanjing 210044, China; (S.W.); (D.X.)
- Jiangsu Key Laboratory for Optoelectronic Detection of Atmosphere and Ocean, School of Physics and Optoelectronic Engineering, Nanjing University of Information Science & Technology, Nanjing 210044, China
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8
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Kim JY, Cho HJ, Do YS. High Color Purity Plasmonic Color Filter by One-Dimensional Photonic Crystals. Nanomaterials (Basel) 2022; 12:1694. [PMID: 35630916 DOI: 10.3390/nano12101694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 04/12/2022] [Accepted: 05/11/2022] [Indexed: 11/30/2022]
Abstract
Structural colors have been reported instead of conventional dye- or pigment-based color filters. Color selectivity can degrade as structure-based optical resonances are accompanied by several resonance modes. In this work, we suggest a simple and effective design of the plasmonic color filter (PCF) that integrated the PCF with the one-dimensional (1D) photonic crystal (PhC). The introduced PhC creates an optical band gap and suppresses undesired peaks of the PCF caused by the high-order resonance mode. Finally, the suggested structure provides a high color purity. This study can be a guideline for technology that replaces conventional color filters.
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Quynh LT, Cheng CW, Huang CT, Raja SS, Mishra R, Yu MJ, Lu YJ, Gwo S. Flexible Plasmonics Using Aluminum and Copper Epitaxial Films on Mica. ACS Nano 2022; 16:5975-5983. [PMID: 35333048 DOI: 10.1021/acsnano.1c11191] [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] [Indexed: 06/14/2023]
Abstract
We demonstrate here the growth of aluminum (Al), copper (Cu), gold (Au), and silver (Ag) epitaxial films on two-dimensional, layered muscovite mica (Mica) substrates via van der Waals (vdW) heteroepitaxy with controllable film thicknesses from a few to hundreds of nanometers. In this approach, the mica thin sheet acts as a flexible and transparent substrate for vdW heteroepitaxy, which allows for large-area formation of atomically smooth, single-crystalline, and ultrathin plasmonic metals without the issue of film dewetting. The high-quality plasmonic metal films grown on mica enable us to design and fabricate well-controlled Al and Cu plasmonic nanostructures with tunable surface plasmon resonances ranging from visible to the near-infrared spectral region. Using these films, two kinds of plasmonic device applications are reported, including (1) plasmonic sensors with high effective index sensitivities based on surface plasmon interferometers fabricated on the Al/Mica film and (2) Cu/Mica nanoslit arrays for plasmonic color filters in the visible and near-infrared regions. Furthermore, we show that the responses of plasmonic nanostructures fabricated on the Mica substrates remain unaltered under large substrate bending conditions. Therefore, the metal-on-mica vdW heteroepitaxy platform is suitable for flexible plasmonics based on their bendable properties.
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Affiliation(s)
- Le Thi Quynh
- Department of Physics, National Tsing-Hua University, Hsinchu 30013, Taiwan
| | - Chang-Wei Cheng
- Department of Physics, National Tsing-Hua University, Hsinchu 30013, Taiwan
| | - Chiao-Tzu Huang
- Department of Electrophysics, National Yang-Ming Chaio-Tung University, Hsinchu 30010, Taiwan
| | - Soniya Suganthi Raja
- Institute of Nanoengineering and Microsystems, National Tsing-Hua University, Hsinchu 30013, Taiwan
| | - Ragini Mishra
- Institute of Nanoengineering and Microsystems, National Tsing-Hua University, Hsinchu 30013, Taiwan
| | - Meng-Ju Yu
- Research Center for Applied Sciences, Academia Sinica, Nankang, Taipei 11529, Taiwan
| | - Yu-Jung Lu
- Research Center for Applied Sciences, Academia Sinica, Nankang, Taipei 11529, Taiwan
| | - Shangjr Gwo
- Department of Physics, National Tsing-Hua University, Hsinchu 30013, Taiwan
- Department of Electrophysics, National Yang-Ming Chaio-Tung University, Hsinchu 30010, Taiwan
- Institute of Nanoengineering and Microsystems, National Tsing-Hua University, Hsinchu 30013, Taiwan
- Research Center for Applied Sciences, Academia Sinica, Nankang, Taipei 11529, Taiwan
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10
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Tzu FM, Hsu SH, Chen JS. Non-Contact Optical Detection of Foreign Materials Adhered to Color Filter and Thin-Film Transistor. Micromachines (Basel) 2022; 13:mi13010101. [PMID: 35056265 PMCID: PMC8779804 DOI: 10.3390/mi13010101] [Citation(s) in RCA: 2] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 01/04/2022] [Accepted: 01/07/2022] [Indexed: 02/04/2023]
Abstract
This paper describes the non-contact optical detection of debris material that adheres to the substrates of color filters (CFs) and thin-film transistors (TFTs) by area charge-coupled devices (CCDs) and laser sensors. One of the optical detections is a side-view illumination by an area CCD that emits a coherency light to detect debris on the CF. In contrast to the height of the debris material, the image is acquired by transforming the geometric shape from a square to a circle. As a result, the side-view illumination from the area CCD identified the height of the debris adhered to the black matrix (BM) as well as the red, green, and blue of a CF with 95, 97, 98, and 99% accuracy compared to the golden sample. The uncertainty analysis was at 5% for the BM, 3% for the red, 2% for the green, and 1% for the blue. The other optical detection, a laser optical interception with a horizontal alignment, inspected the material foreign to the TFT. At the same time, laser sensors intercepted the debris on the TFT at a voltage of 3.5 V, which the five sets of laser optics make scanning the sample. Consequently, the scanning rate reached over 98% accuracy, and the uncertainty analysis was within 5%. Thus, both non-contact optical methods can detect debris at a 50 μm height or lower. The experiment presents a successful design for the efficient prevention of a valuable component malfunction.
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Affiliation(s)
- Fu-Ming Tzu
- Department of Marine Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 80543, Taiwan
- Correspondence:
| | - Shih-Hsien Hsu
- Department of Electrical Engineering, Feng Chia University, Taichung 40802, Taiwan;
| | - Jung-Shun Chen
- Department of Industrial Technology Education, National Kaohsiung Normal University, Kaohsiung 80201, Taiwan;
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Han T, Noh J, Kim MH, Rho J, Jo H. Pixelated Microsized Quantum Dot Arrays Using Surface-Tension-Induced Flow. ACS Appl Mater Interfaces 2021; 13:51718-51725. [PMID: 34677928 DOI: 10.1021/acsami.1c14857] [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] [Indexed: 06/13/2023]
Abstract
Quantum dots (QDs) are semiconducting nanoparticles that exhibit unique fluorescent characteristics when excited by an ultraviolet light source. Owing to their highly saturated emissions, display panels using QDs as pixels have been presented. However, the complications of the nanofabrication procedure limit the industrial application of QDs. This study suggests a method to arrange high-aspect-ratio QD pixels by inducing both Laplace-pressure-driven capillary flow and thermally driven Marangoni flow. The evaporation of colloidal QDs induces a capillary flow that drives the QDs toward the inner tips of V-shaped structures. Additionally, the Marangoni flow arranges the gathered QDs at the tip; thus, they could form a high dune, overcoming the limitations of the existing capillary assembly method using evaporation. Using these phenomena, clover-shaped (assembly of V-shaped edges) templates were made to gather numerous QDs, and the clover with a 30° angle afforded the highest brightness among all the angle structures. Finally, by demonstrating a 100-cm2-sized QD microarray with high uniformity (98.6%), our method shows the feasibility of large-area fabrication, which has extensive application in manufacturing QD displays, anti-counterfeiting labels, and other QD-based optical devices.
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Affiliation(s)
- Taeyang Han
- Division of Advanced Nuclear Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Jaebum Noh
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Moo Hwan Kim
- Division of Advanced Nuclear Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
| | - Junsuk Rho
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
- Department of Chemical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
- POSCO-POSTECH-RIST Convergence Research Center for Flat Optics and Metaphotonics, Pohang 37673, Republic of Korea
| | - HangJin Jo
- Division of Advanced Nuclear Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
- Department of Mechanical Engineering, Pohang University of Science and Technology (POSTECH), Pohang 37673, Republic of Korea
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12
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Chen X, Liang P, Wu Q, Tan Q, Dong X. Fluorescence Enhanced Optical Resonator Constituted of Quantum Dots and Thin Film Resonant Cavity for High-Efficiency Reflective Color Filter. Nanomaterials (Basel) 2021; 11:nano11112813. [PMID: 34835579 PMCID: PMC8619847 DOI: 10.3390/nano11112813] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/16/2021] [Revised: 10/14/2021] [Accepted: 10/20/2021] [Indexed: 11/16/2022]
Abstract
Conventional color filters selectively absorb a part of the backlight while reflecting or transmitting other light, resulting in the problem of low efficiency and energy wasting. For this problem, a new concept of fluorescence enhanced optical resonator was proposed and verified in this paper. The new structure consists of structural color filter and light-conversion material. Specially, a thin film resonant cavity was designed, and InP/ZnSe/ZnS quantum dots were inserted inside the resonator. When illuminated by sunlight, the novel fluorescence enhanced optical resonator could not only reflect the specific light, but also convert absorbed energy into desired light, leading to the utilization efficiency improvement of solar energy. An all-dielectric red fluorescence enhanced optical resonator was fabricated, with peak equivalent reflectance up to 105%. Compared with a thin film resonator, the enhancement coefficient of the as-proposed structure is about 124%. The new optical structure can utilize solar source efficiently, showing application potential as the next generation of reflective color filters for display.
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Affiliation(s)
- Xiaochuan Chen
- State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing 100084, China;
- BOE Technology Group Co., Ltd., Beijing 100176, China; (P.L.); (Q.W.)
| | - Pengxia Liang
- BOE Technology Group Co., Ltd., Beijing 100176, China; (P.L.); (Q.W.)
| | - Qian Wu
- BOE Technology Group Co., Ltd., Beijing 100176, China; (P.L.); (Q.W.)
| | - Qiaofeng Tan
- State Key Laboratory of Precision Measurement Technology and Instruments, Department of Precision Instrument, Tsinghua University, Beijing 100084, China;
- Correspondence: (Q.T.); (X.D.)
| | - Xue Dong
- BOE Technology Group Co., Ltd., Beijing 100176, China; (P.L.); (Q.W.)
- Correspondence: (Q.T.); (X.D.)
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13
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Xu K, Meng Y, Chen S, Li Y, Wu Z, Jin S. All-Dielectric Color Filter with Ultra-Narrowed Linewidth. Micromachines (Basel) 2021; 12:mi12030241. [PMID: 33673484 PMCID: PMC7997520 DOI: 10.3390/mi12030241] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2021] [Revised: 02/23/2021] [Accepted: 02/24/2021] [Indexed: 11/16/2022]
Abstract
In this paper, a transmissive color filter with an ultra-narrow full width at half of the maximum is proposed. Exploiting a material with a high index of refraction and an extremely low extinction coefficient in the visible range allows the quality factor of the filter to be improved. Three groups of GaP/SiO2 pairs are used to form a Distributed Brag reflector in a symmetrical Fabry-Pérot cavity. A band-pass filter which is composed of ZnS/SiO2 pairs is also introduced to further promote the purity of the transmissive spectrum. The investigation manifests that a series of tuned spectrum with an ultra-narrow full width at half of the maximum in the full visible range can be obtained by adjusting the thickness of the SiO2 interlayer. The full width at half of the maximum of the transmissive spectrum can reach 2.35 nm. Simultaneously, the transmissive efficiency in the full visible range can keep as high as 0.75. Our research provides a feasible and cost-effective way for realizing filters with ultra-narrowed linewidth.
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Affiliation(s)
- Kai Xu
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China; (K.X.); (Y.L.); (S.J.)
| | - Yanlong Meng
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China; (K.X.); (Y.L.); (S.J.)
- Key Laboratory for Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications (NUPT), 9 Wenyuan Road, Nanjing 210023, China;
- Correspondence: ; Tel.: +86-571-87676264
| | - Shufen Chen
- Key Laboratory for Organic Electronics and Information Displays and Jiangsu Key Laboratory for Biosensors, Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts and Telecommunications (NUPT), 9 Wenyuan Road, Nanjing 210023, China;
| | - Yi Li
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China; (K.X.); (Y.L.); (S.J.)
| | - Zhijun Wu
- Fujian Key Laboratory of Light Propagation and Transformation, College of Information Science and Engineering, Huaqiao University, Xiamen 361021, China;
| | - Shangzhong Jin
- College of Optical and Electronic Technology, China Jiliang University, Hangzhou 310018, China; (K.X.); (Y.L.); (S.J.)
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14
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Umar M, Son D, Arif S, Kim M, Kim S. Multistimuli-Responsive Optical Hydrogel Nanomembranes to Construct Planar Color Display Boards for Detecting Local Environmental Changes. ACS Appl Mater Interfaces 2020; 12:55231-55242. [PMID: 33232110 DOI: 10.1021/acsami.0c15195] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Planar metal-insulator-metal (MIM) optical cavities are attractive for biochemical and environmental sensing applications, as they offer a cost-effective cavity platform with acceptable performances. However, localized detection and scope of expansion of applicable analytes are still challenging. Here, we report a stimuli-responsive color display board that can exhibit local spectral footprints, for locally applied heat and alcohol presence. A thermoresponsive, optically applicable, and patternable copolymer, poly(N-isopropylacrylamide-r-glycidyl methacrylate), is synthesized and used with a photosensitive cross-linker to produce a responsive insulating layer. This layer is then sandwiched between two nanoporous silver membranes to yield a thermoresponsive MIM cavity. The resonant spectral peak is blue-shifted as the environmental temperature increases, and the dynamic range of the resonant peak is largely affected by the composition and structure of the cross-linker and the copolymer. The localized temperature increase of silk particles with gold nanoparticles by laser heating can be measured by reading the spectral shift. In addition, a free-standing color board can be transferred onto a curved biological tissue sample, allowing us to simultaneously read the temperature of the tissue sample and the concentration of ethanol. The stimuli-responsive MIM provides a new way to optically sense localized environmental temperature and ethanol concentration fluctuations.
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Affiliation(s)
- Muhammad Umar
- Department of Energy Systems Research, Ajou University, Suwon 16499, Republic of Korea
| | - Dongwan Son
- Department of Chemistry and Chemical Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Sara Arif
- Department of Energy Systems Research, Ajou University, Suwon 16499, Republic of Korea
| | - Myungwoong Kim
- Department of Chemistry and Chemical Engineering, Inha University, Incheon 22212, Republic of Korea
| | - Sunghwan Kim
- Department of Energy Systems Research, Ajou University, Suwon 16499, Republic of Korea
- Department of Physics, Ajou University, Suwon 16499, Republic of Korea
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15
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Zhao ZJ, Hwang SH, Kang HJ, Jeon S, Bok M, Ahn S, Im D, Hahn J, Kim H, Jeong JH. Adhesive-Layer-Free and Double-Faced Nanotransfer Lithography for a Flexible Large-Area MetaSurface Hologram. ACS Appl Mater Interfaces 2020; 12:1737-1745. [PMID: 31823599 DOI: 10.1021/acsami.9b14345] [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: 06/10/2023]
Abstract
Herein, we develop an adhesive-free double-faced nanotransfer lithography (ADNT) technique based on the surface deformation of flexible substrates under the conditions of temperature and pressure control and thus address the challenge of realizing the mass production of large-area nanodevices in the fields of optics, metasurfaces, and holograms. During ADNT, which is conducted on a flexible polymer substrate above its glass transition temperature in the absence of adhesive materials and chemical bonding agents, nanostructures from the polymer stamp are attached to the deformed polymer substrate. Various silicon masters are employed to prove our method applicable to arbitrary nanopatterns, and diverse Ag and Au nanostructures are deposited on polymer molds to demonstrate the wide scope of useable metals. Finally, ADNT is used to (i) produce a flexible large-area hologram on the defect-free poly(methyl methacrylate) (PMMA) film and (ii) fabricate a metasurface hologram and a color filter on the front and back surfaces of the PMMA film, respectively, to realize dual functionality. Thus, it is concluded that the use of ADNT can decrease the fabrication time and cost of high-density nanodevices and facilitate their commercialization.
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Affiliation(s)
- Zhi-Jun Zhao
- Nano-Convergence Mechanical Systems Research Division , Korea Institute of Machinery and Materials , 156, Gajeongbuk-ro , Yuseong-gu, Daejeon 34103 , South Korea
| | - Soon Hyoung Hwang
- Nano-Convergence Mechanical Systems Research Division , Korea Institute of Machinery and Materials , 156, Gajeongbuk-ro , Yuseong-gu, Daejeon 34103 , South Korea
| | - Hyeok-Joong Kang
- Nano-Convergence Mechanical Systems Research Division , Korea Institute of Machinery and Materials , 156, Gajeongbuk-ro , Yuseong-gu, Daejeon 34103 , South Korea
| | - Sohee Jeon
- Nano-Convergence Mechanical Systems Research Division , Korea Institute of Machinery and Materials , 156, Gajeongbuk-ro , Yuseong-gu, Daejeon 34103 , South Korea
| | - Moonjeong Bok
- Nano-Convergence Mechanical Systems Research Division , Korea Institute of Machinery and Materials , 156, Gajeongbuk-ro , Yuseong-gu, Daejeon 34103 , South Korea
| | - Sunggyun Ahn
- School of Electronics Engineering , Kyungpook National University , Daegu 41566 , South Korea
| | - DaJeong Im
- Department of Electronics and Information Engineering , Korea University , Sejong 30019 , South Korea
| | - Joonku Hahn
- School of Electronics Engineering , Kyungpook National University , Daegu 41566 , South Korea
| | - Hwi Kim
- Department of Electronics and Information Engineering , Korea University , Sejong 30019 , South Korea
| | - Jun-Ho Jeong
- Nano-Convergence Mechanical Systems Research Division , Korea Institute of Machinery and Materials , 156, Gajeongbuk-ro , Yuseong-gu, Daejeon 34103 , South Korea
- Department of Nano Mechatronics , University of Science and Technology , 217, Gajeongbuk-ro, Yuseong-gu , Daejeon 34103 , South Korea
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16
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Kim Y, Moon K, Lee YJ, Hong S, Kwon SH. Metal Slot Color Filter Based on Thin Air Slots on Silver Block Array. Nanomaterials (Basel) 2019; 9:nano9060912. [PMID: 31242586 PMCID: PMC6631205 DOI: 10.3390/nano9060912] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2019] [Revised: 06/17/2019] [Accepted: 06/21/2019] [Indexed: 11/16/2022]
Abstract
The human eye perceives the color of visible light depending on the spectrum of the incident light. Hence, the ability of color expression is very important in display devices. For practical applications, the transmitted color filter requires high transmittance and vivid colors, covering full standard default color spaces (sRGB). In this paper, we propose a color filter with a silver block array on a silica substrate structure with nanoscale air slots where strong transmission is observed through the slots between silver blocks. We investigated the transmitted color by simulating the transmission spectra as functions of various structure parameters. The proposed structure with an extremely small pixel size of less than 300 nm covers 90% of sRGB color depending on the structure and has a narrow angular distribution of transmitted light.
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Affiliation(s)
- Youngsoo Kim
- Department of Physics, Chung-Ang University, Seoul 06974, Korea.
| | - Kihwan Moon
- Department of Physics, Chung-Ang University, Seoul 06974, Korea.
| | - Young Jin Lee
- Department of Physics, Chung-Ang University, Seoul 06974, Korea.
| | - Seokhyeon Hong
- Department of Physics, Chung-Ang University, Seoul 06974, Korea.
| | - Soon-Hong Kwon
- Department of Physics, Chung-Ang University, Seoul 06974, Korea.
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17
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Shafian S, Son J, Kim Y, Hyun JK, Kim K. Active-Material-Independent Color-Tunable Semitransparent Organic Solar Cells. ACS Appl Mater Interfaces 2019; 11:18887-18895. [PMID: 31081315 DOI: 10.1021/acsami.9b03254] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Semitransparent colorful organic solar cells (OSC) provide exciting opportunities for harnessing sunlight as colored windows. Previously, color filter (CF) electrodes on (OSC) were demonstrated via vacuum-deposition techniques, resulting in deposition-induced damage. Thus, we present CF integrated organic photovoltaics (CF-OPVs) using solution-processed TiO2-AcAc as the dielectric component. The noninvasive processing substantially expands the range of usable active materials, allowing the device to display pure and vibrant colors that are independent of the inherent color of the active material and show superior optical and photovoltaic characteristics. These results provide practical pathways to realizing colored semitransparent solar cells.
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Affiliation(s)
- Shafidah Shafian
- Department of Chemistry and Nanoscience , Ewha Womans University , Seoul 03760 , Republic of Korea
| | - Jieun Son
- Department of Chemistry and Nanoscience , Ewha Womans University , Seoul 03760 , Republic of Korea
| | - Youngji Kim
- Department of Chemistry and Nanoscience , Ewha Womans University , Seoul 03760 , Republic of Korea
| | - Jerome K Hyun
- Department of Chemistry and Nanoscience , Ewha Womans University , Seoul 03760 , Republic of Korea
| | - Kyungkon Kim
- Department of Chemistry and Nanoscience , Ewha Womans University , Seoul 03760 , Republic of Korea
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18
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Miyamichi A, Ono A, Kagawa K, Yasutomi K, Kawahito S. Plasmonic Color Filter Array with High Color Purity for CMOS Image Sensors. Sensors (Basel) 2019; 19:E1750. [PMID: 31013721 DOI: 10.3390/s19081750] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/05/2019] [Revised: 04/04/2019] [Accepted: 04/06/2019] [Indexed: 11/27/2022]
Abstract
We demonstrate the multiband color filtering of a standard RGB color and a complementary CMY color by a plasmonic color filter, composed of concentric corrugated metallic thin film rings. The surface plasmon resonance is excited by the periodic corrugation, and the coupled light is transmitted through the central subwavelength aperture. Color selectivity is achieved not only in the visible but also in the near-infrared (NIR) region. Therefore, simultaneous imaging with visible and NIR can be realized by the integration of plasmonic color filters with sensors. We investigate the angle of incidence dependence of the transmission color selectivity and the color purity of the fabricated plasmonic color filter array.
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19
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Bang S, Kim J, Yoon G, Tanaka T, Rho J. Recent Advances in Tunable and Reconfigurable Metamaterials. Micromachines (Basel) 2018; 9:E560. [PMID: 30715059 DOI: 10.3390/mi9110560] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2018] [Accepted: 10/26/2018] [Indexed: 12/17/2022]
Abstract
Metamaterials are composed of nanostructures, called artificial atoms, which can give metamaterials extraordinary properties that cannot be found in natural materials. The nanostructures themselves and their arrangements determine the metamaterials’ properties. However, a conventional metamaterial has fixed properties in general, which limit their use. Thus, real-world applications of metamaterials require the development of tunability. This paper reviews studies that realized tunable and reconfigurable metamaterials that are categorized by the mechanisms that cause the change: inducing temperature changes, illuminating light, inducing mechanical deformation, and applying electromagnetic fields. We then provide the advantages and disadvantages of each mechanism and explain the results or effects of tuning. We also introduce studies that overcome the disadvantages or strengthen the advantages of each classified tunable metamaterial.
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20
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Abstract
Color filters based upon nanostructured metals have garnered significant interest in recent years, having been positioned as alternatives to the organic dye-based filters which provide color selectivity in image sensors, as nonfading "printing" technologies for producing images with nanometer pixel resolution, and as ultra-high-resolution, small foot-print optical storage and encoding solutions. Here, we demonstrate a plasmonic filter set with polarization-switchable color properties, based upon arrays of asymmetric cross-shaped nanoapertures in an aluminum thin-film. Acting as individual color-emitting nanopixels, the plasmonic cavity-apertures have dual-color selectivity, transmitting one of two visible colors, controlled by the polarization of the white light incident on the rear of the pixel and tuned by varying the critical dimensions of the geometry and periodicity of the array. This structural approach to switchable optical filtering enables a single nanoaperture to encode two information states within the same physical nanoaperture, an attribute we use here to create micro image displays containing duality in their optical information states.
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Affiliation(s)
- Zhibo Li
- Biomedical Engineering Research Division, School of Engineering, University of Glasgow , Rankine Building, Glasgow G12 8LT, United Kingdom
| | - Alasdair W Clark
- Biomedical Engineering Research Division, School of Engineering, University of Glasgow , Rankine Building, Glasgow G12 8LT, United Kingdom
| | - Jonathan M Cooper
- Biomedical Engineering Research Division, School of Engineering, University of Glasgow , Rankine Building, Glasgow G12 8LT, United Kingdom
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21
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Abstract
Visible-light filters constructed from nanostructured materials typically consist of a metallic grating and rely on the excitation of surface plasmon polaritons (SPPs). In order to operate at full efficiency, the number of grating elements needs to be maximized such that light can couple more efficiently to the SPPs through improved diffraction. Such conditions impose a limitation on the compactness of the filter since a larger number of grating elements represents a larger effective size. For emerging applications involving nanoscale transmitters or receivers, a device that can filter localized excitations is highly anticipated but is challenging to realize through grating-type filters. In this work, we present the design of an optical filter operating with a single element, marking a departure from diffractive plasmonic coupling. Our device consists of a ZnO nanorod enclosed by two layers of Ag film. For diffraction-limited light focused on the nanorod, narrow passbands can be realized and tuned via variation of the nanorod diameter across the visible spectrum. The spectral and spatial filtering originates from scattering cancellation localized at the nanorod due to the cavity and nanorod exhibiting opposite effective dipole moments. This ability to realize high-performance optical filtering at the ultimate size introduces intriguing possibilities for nanoscale near-field communication or ultrahigh resolution imaging pixels.
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Affiliation(s)
- Jerome K Hyun
- Department of Chemistry and Nano Science, Ewha Womans University , Seoul 120-750, Korea
| | - Taehee Kang
- Department of Physics and Astronomy, Seoul National University , Seoul 151-742, Korea
| | - Hyeonjun Baek
- Department of Physics and Astronomy, Seoul National University , Seoul 151-742, Korea
| | - Dai-sik Kim
- Department of Physics and Astronomy, Seoul National University , Seoul 151-742, Korea
| | - Gyu-chul Yi
- Department of Physics and Astronomy, Seoul National University , Seoul 151-742, Korea
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22
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Shin H, Park Y, Kim S, An BK, Park J. Synthesis and characterization of titanium complex with a dithiolate ligand for green LCD color filter dyes. Nanoscale Res Lett 2012; 7:635. [PMID: 23171599 PMCID: PMC3564713 DOI: 10.1186/1556-276x-7-635] [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] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/12/2012] [Accepted: 10/03/2012] [Indexed: 06/01/2023]
Abstract
Three green compounds for color filter dyes based on bis(cyclopentadienyl) titanium complexes including dithiolate ligand were synthesized. Physical properties by the change of the substitution groups of the synthesized materials were systematically examined. UV-visible absorption spectrum of the synthesized materials showed maximum absorbing wavelengths of 427 to 430 nm and 632 to 635 nm in solution state, and 434 to 438 nm and 637 to 651 nm in film state, indicating green and black colors. It was observed that the extinction coefficient values (log ε) of all the synthesized materials are very high at 4.0 or above. In addition, it was shown that since the Td values of three synthesized materials show thermal stability higher than 240°C, they possess high potential to be applied as dyes for LCD color filter and black matrix addictive.
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Affiliation(s)
- Hwangyu Shin
- Department of Chemistry, The Catholic University of Korea, Jibong-ro 43, Bucheon, 420-743, South Korea
| | - Youngil Park
- Department of Chemistry, The Catholic University of Korea, Jibong-ro 43, Bucheon, 420-743, South Korea
| | - Seungho Kim
- Department of Chemistry, The Catholic University of Korea, Jibong-ro 43, Bucheon, 420-743, South Korea
| | - Byeong-Kwan An
- Department of Chemistry, The Catholic University of Korea, Jibong-ro 43, Bucheon, 420-743, South Korea
| | - Jongwook Park
- Department of Chemistry, The Catholic University of Korea, Jibong-ro 43, Bucheon, 420-743, South Korea
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