In situ electrodeposition of nickel cobalt selenides on FTO as an efficient counter electrode for dye-sensitized solar cells |
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| Affiliation: | 1. Faculty of Electronic Information Engineering, Huaiyin Institute of Technology, Huai''an 223003, China;2. Jiangsu Engineering Laboratory for Lake Environment Remote Sensing Technologies, Huaiyin Institute of Technology, Huai''an 223003, China;3. Faculty of Mechanical & Material Engineering, Huaiyin Institute of Technology, Huai''an 223003, China;1. School of Metallurgy, Northeastern University, Shenyang, Liaoning, 110819, PR China;2. State Key Laboratory of Urban Water Resource and Environment, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, Heilongjiang, 150001, PR China;1. State Key Laboratory of Materials Processing and Die & Mould Technology, Huazhong University of Science and Technology, Wuhan 430074, People’s Republic of China;2. Shenzhen Institute of Huazhong University of Science & Technology, Shenzhen 518000, People’s Republic of China;1. Solar Energy Lab, Department of Chemistry, Thiruvalluvar University, Vellore 632115, India;2. Department of Physics, Yogi Vemana University, Kadapa 516003, Andhra Pradesh, India;3. Centre for Ionics University of Malaya, Department of Physics, University of Malaya, Kuala Lumpur 50603, Malaysia;1. Faculty of Mathematics and Physics, Huaiyin Institute of Technology, Huai’an 223003, People''s Republic of China;2. Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, Heilongjiang University, Harbin 150080, People''s Republic of China;3. Center of Super-Diamond and Advanced Films, City University of Hong Kong, Hong Kong Special Administrative Region;1. Tianjin Key Laboratory of Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, China;2. College of Environment and Resource, Shanxi University, Taiyuan 30006, China;1. School of Chemistry and Materials Engineering, Fuyang Normal University, Fuyang, Anhui 236037, PR China;2. Anhui Province Key Laboratory of Environmental Hormone and Reproduction, Anhui Province Key Laboratory of Embryo Development and Reproductive Regulation, Fuyang Normal University, Fuyang, Anhui 236037, PR China |
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| Abstract: | Construction of transition metal selenides with high electrocatalytic performance is of significant importance, but it is still a challenge to develop the corresponding counter electrodes (CEs) by an electrodeposition technique. In the present work, nickel cobalt selenide (NixCoySe) films are prepared in situ on fluorine-doped tin oxide (FTO) glasses through a potential reversal electrodeposition technique. The morphology and electronic structure of NixCoySe films can be tuned by controlling the Ni/Co molar ratio in electroplating solution. Specially, NixCoySe-6 film (the Ni/Co molar ratio of 1:1) with the optimized interaction between the Ni and Co elements displays numerous particles composed of sheets attached with nanocrystals, resulting in the more electrocatalytic active sites. Benefiting from the unique morphology and optimized synergistic effect, NixCoySe-6 CE exhibits superior electrocatalytic activity for the triiodide reduction. Then, the dye-sensitized solar cell (DSC) fabricated by NixCoySe-6 CE has demonstrated a power conversion efficiency (PCE) over 7.40%, which is higher than that of platinum (Pt)-based device (6.32%). Furthermore, NixCoySe-6 array CE is also prepared by using polystyrene array as template. The PCE of the DSC with NixCoySe-6 array CE reaches its maximum value of 7.64% and 20.9% larger than that of Pt-based device. |
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| Keywords: | Counter electrodes Nickel cobalt selenides Potential reversal electrodeposition technique Array Synergistic effect |
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