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Guo W, Yan S, Wang S, Jing L, Mao C, Zhang Z, Peng H, Guo X, Li G. A Simple Route to Fabricate an Artificial Interface Protective Layer on a Zn Anode for Aqueous Zn‐Ion Batteries. ChemistrySelect 2022. [DOI: 10.1002/slct.202200926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Wenqian Guo
- College of Material Science and Engineering Qingdao University of Science and Technology No.53 Zhengzhou Road Qingdao Shandong 266042 PR China
| | - Sixu Yan
- College of Material Science and Engineering Qingdao University of Science and Technology No.53 Zhengzhou Road Qingdao Shandong 266042 PR China
| | - Shuyi Wang
- College of Material Science and Engineering Qingdao University of Science and Technology No.53 Zhengzhou Road Qingdao Shandong 266042 PR China
| | - Lei Jing
- Jiangsu Guanlian Polymeric Material Co., Ltd. No. 58 Xinliu Road, Ludu, Taicang Jiangsu China
| | - Changming Mao
- College of Material Science and Engineering Qingdao University of Science and Technology No.53 Zhengzhou Road Qingdao Shandong 266042 PR China
| | - Zhonghua Zhang
- College of Material Science and Engineering Qingdao University of Science and Technology No.53 Zhengzhou Road Qingdao Shandong 266042 PR China
| | - Hongrui Peng
- College of Material Science and Engineering Qingdao University of Science and Technology No.53 Zhengzhou Road Qingdao Shandong 266042 PR China
| | - Xiaosong Guo
- College of Material Science and Engineering Qingdao University of Science and Technology No.53 Zhengzhou Road Qingdao Shandong 266042 PR China
| | - Guicun Li
- College of Material Science and Engineering Qingdao University of Science and Technology No.53 Zhengzhou Road Qingdao Shandong 266042 PR China
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Melioration of Electrical and Optical Properties of Al and B Co-Doped ZnO Transparent Semiconductor Thin Films. COATINGS 2021. [DOI: 10.3390/coatings11101259] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Undoped, Al-doped and Al-B co-doped ZnO transparent semiconductor thin films were deposited on glass substrates by sol-gel method and spin coating technique. This study investigated the influence of Al (2 at.%) doping and Al (2 at.%)-B (1 or 2 at.%) co-doping on the microstructural, surface morphological, electrical and optical properties of the ZnO-based thin films. XRD analysis indicated that all as-prepared ZnO-based thin films were polycrystalline with a single-phase hexagonal wurtzite structure. The substitution of extrinsic dopants (Al or Al-B) into ZnO thin films can significantly degrade the crystallinity, refine the microstructures, improve surface flatness, enhance the optical transparency in the visible spectrum and lead to a shift in the absorption edge toward the short-wavelength direction. Experimental results showed that the Al-doped and Al-B co-doped ZnO thin films exhibited high average transmittance (>91.3%) and low average reflectance (<10%) in the visible region compared with the ZnO thin film. The optical parameters, including the optical bandgap, Urbach energy, extinction coefficient and refractive index, changed with the extrinsic doping level. Measured results of electrical properties revealed that the singly doped and co-doped samples exhibited higher electron concentrations and lower resistivities than those of the undoped sample and suggested that 2 at.% Al and 1 at.% B were the optimum dopant concentrations for achieving the best electrical properties in this study.
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Trung DQ, Quang NV, Tran MT, Du NV, Tu N, Hung ND, Viet DX, Anh DD, Huy PT. Single-composition Al 3+-singly doped ZnO phosphors for UV-pumped warm white light-emitting diode applications. Dalton Trans 2021; 50:9037-9050. [PMID: 34160493 DOI: 10.1039/d1dt00971k] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The development of full-visible-spectrum phosphors is essential for next-generation light-emitting devices with better light quality. Herein, we report on a novel broad-band-emitting phosphor based on single-composition Al-doped ZnO phosphors. Under the UV excitation of 325 nm, the ZnO : Al phosphor exhibits a full spectrum emission in the visible wavelength range from 400 to 800 nm with a CIE chromaticity coordinate of (0.42, 0.48), a quantum efficiency of 43%, a color rendering index (CRI) of 74, a correlated color temperature (CCT) value of 3873 K and an activation energy of 0.22 eV. A prototype of a UV-pumped warm WLED with a high CRI of 87 and a CCT of 4067 K has been achieved by using only this broad-band-emitting Al3+-doped ZnO phosphor. The obtained results indicate that the single-composition Al3+-singly doped warm white emitting phosphor is a promising candidate for UV-pump warm white light-emitting diodes.
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Affiliation(s)
- D Q Trung
- Phenikaa Institute for Advanced Study (PIAS), Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam. and Phenikaa Research and Technology Institute (PRATI), Phenikaa University, 167 Hoang Ngan, Hanoi 10000, Vietnam and Faculty of Fundamental Sciences, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam
| | - N V Quang
- Faculty of Materials Science, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam and Department of Chemistry, Hanoi Pedagogical University 2, Phuc Yen, Vinh Phuc, Vietnam
| | - M T Tran
- Phenikaa Research and Technology Institute (PRATI), Phenikaa University, 167 Hoang Ngan, Hanoi 10000, Vietnam and Faculty of Materials Science, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam
| | - N V Du
- Phenikaa Research and Technology Institute (PRATI), Phenikaa University, 167 Hoang Ngan, Hanoi 10000, Vietnam and Faculty of Materials Science, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam
| | - N Tu
- Phenikaa Institute for Advanced Study (PIAS), Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam. and Phenikaa Research and Technology Institute (PRATI), Phenikaa University, 167 Hoang Ngan, Hanoi 10000, Vietnam and Faculty of Fundamental Sciences, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam
| | - N D Hung
- Advanced Institute of Science and Technology (AIST), Hanoi University of Science and Technology (HUST), N0 01 Dai Co Viet, Hanoi, Vietnam
| | - Dao Xuan Viet
- Advanced Institute of Science and Technology (AIST), Hanoi University of Science and Technology (HUST), N0 01 Dai Co Viet, Hanoi, Vietnam
| | - D D Anh
- Faculty of Materials Science, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam
| | - P T Huy
- Phenikaa Research and Technology Institute (PRATI), Phenikaa University, 167 Hoang Ngan, Hanoi 10000, Vietnam and Faculty of Materials Science, Phenikaa University, Yen Nghia, Ha-Dong District, Hanoi 10000, Vietnam
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Bhunia AK, Saha S. Characterization of zinc oxide nanocrystals with different morphology for application in ultraviolet-light photocatalytic performances on rhodamine B. LUMINESCENCE 2020; 36:149-162. [PMID: 32729672 DOI: 10.1002/bio.3930] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Revised: 07/08/2020] [Accepted: 07/27/2020] [Indexed: 11/10/2022]
Abstract
ZnO nanostructures of different morphology (nanorods, nano-leaf, nanotubes) were favourably grown using a chemical precipitation process. The prepared ZnO nanostructures were characterized systematically using absorption spectroscopy, emission spectroscopy, X-ray diffraction (XRD), scanning electron microscopy (SEM) and Fourier transform infrared studies. XRD results showed the hexagonal wurtzite phase of the synthesized ZnO nanostructures. Structural properties such as average crystallite size, lattice constants, volume of the unit cell, atomic fraction, and structural bonds were also studied. The optical band gap of the synthesized ZnO nanocrystals varied from 3.52 eV to 3.69 eV with high quantum yield of the blue emission (~420 nm). Urbach energy for ZnO nanocrystals was calculated to be 0.702 eV, 0.901 eV, and 0.993 eV for nanorods, nano-leaf, and tube like ZnO crystals, respectively. Morphology of the fabricated nanostructures was investigated using SEM. Photocatalytic degradation of rhodamine B (Rh B) in solution under UV irradiation was explored with different ZnO morphology. Photocatalytic experiments showed that ZnO nano-leaf had a higher degradation rate of photocatalytic activity of photodegrading Rh B compared with the other tube shape and rods shape nanostructures. The Rh B dye degraded considerably by ∼79.05%, 74.41%, and 69.8% within 120 min in the presence of the as-fabricated fern nano-leaf, nanotubes, and nanorods of the ZnO nanocrystals at room temperature.
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Affiliation(s)
- Amit Kumar Bhunia
- Department of Physics, Government General Degree College at Gopiballavpur-II, Beliaberah, Jhargram, West Bengal, India
| | - Satyajit Saha
- Department of Physics, Vidyasagar University, Paschim Medinipur, West Bengal, India
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Samavati A, Samavati Z, Ismail AF, Othman MHD, Rahman MA, Amiri IS. Effect of organic ligand-decorated ZnO nanoparticles as a cathode buffer layer on electricity conversion efficiency of an inverted solar cell. RSC Adv 2018; 8:1418-1426. [PMID: 35540893 PMCID: PMC9077044 DOI: 10.1039/c7ra11902j] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Accepted: 12/18/2017] [Indexed: 11/29/2022] Open
Abstract
Efficiency improvement of the industrial scale solar cells to capture sunlight as an important renewable energy source is attracting significant attention to prevent the consumption of a finite supply of unsustainable fossil fuels. ZnO nanoparticles decorated with an imine-linked receptor have been used in the fabrication of a photocathode based on dye-sensitized solar cells for the purpose of photovoltaic efficiency enhancement. Various characterization techniques have been employed to investigate the structural, morphological, and optical behaviors of the solar cell having ZnO nanoparticles and ZnO nanoparticles decorated with an organic ligand as a photocathode layer. The decorated nanoparticles have a stable wurtzite structure and an average grain size of ∼45 nm, confirmed by the TEM image and XRD through the Scherrer equation. The ZnO sample emits wide peaks in the visible range, and the emission intensity of the ZnO-DOL sample increases along with a red-shift (0.38 eV) in the band gap. This shift can be explained using deep level transition, surface plasmon energy of a surfactant, and coupling of ZnO with local surface plasmon energy. UV-vis absorption spectra together with photoluminescence spectra confirm the higher absorption rate due to organic ligand decoration on ZnO nanoparticles. The greatest solar power-to-electricity conversion efficiency (η) of 3.48% is achieved for the ZnO-DOL sample. It is enhanced by 3.13% as compared to that of the ZnO-based solar cell. The ZnO-DOL device exhibits a higher external quantum efficiency (EQE), responsivity (Rλ), and photocurrent-to-dark current ratio; this confirms the improvement in the solar cell performance. Efficiency improvement of the industrial scale solar cells to capture sunlight as an important renewable energy source is attracting significant attention to prevent the consumption of a finite supply of unsustainable fossil fuels.![]()
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Affiliation(s)
- Alireza Samavati
- Advanced Membrane Technology Research Centre (AMTEC)
- Universiti Teknologi Malaysia
- Skudai
- Malaysia
| | - Zahra Samavati
- Advanced Membrane Technology Research Centre (AMTEC)
- Universiti Teknologi Malaysia
- Skudai
- Malaysia
| | - A. F. Ismail
- Advanced Membrane Technology Research Centre (AMTEC)
- Universiti Teknologi Malaysia
- Skudai
- Malaysia
| | - M. H. D. Othman
- Advanced Membrane Technology Research Centre (AMTEC)
- Universiti Teknologi Malaysia
- Skudai
- Malaysia
| | - Mukhlis A. Rahman
- Advanced Membrane Technology Research Centre (AMTEC)
- Universiti Teknologi Malaysia
- Skudai
- Malaysia
| | - I. S. Amiri
- Computational Optics Research Group
- Ton Duc Thang University
- Ho Chi Minh City
- Vietnam
- Faculty of Applied Sciences
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