Abstract
Ternary I–III–VI quantum dots (QDs) of chalcopyrite semiconductors exhibit excellent optical properties in solar cells. In this study, ternary chalcopyrite CuGaS2 nanocrystals (2–5 nm) were one-pot anchored on TiO2 nanoparticles (TiO2@CGS) without any long ligand. The solar cell with TiO2@CuGaS2/N719 has a power conversion efficiency of 7.4%, which is 23% higher than that of monosensitized dye solar cell. Anchoring CuGaS2 QDs on semiconductor nanoparticles to form QDs/dye co-sensitized solar cells is a promising and feasible approach to enhance light absorption, charge carrier generation as well as to facilitate electron injection comparing to conventional mono-dye sensitized solar cells.
摘要
三元I-III-VI族黄铜矿量子点作为太阳电池的敏化剂表现出优异的光学性质. 我们采用一步法将2-5纳米的三元黄铜矿CuGaS2量子点铆钉在TiO2纳米颗粒上, 不通过任何有机分子作为链接制备出了TiO2@CGS复合材料. 研究发现量子点和染料TiO2@CuGaS2/N719共敏化太阳电池效率达到7.4%, 相对于单敏化染料太阳电池而言,其电池效率提高了23%. CuGaS2量子点铆钉在半导体纳米颗粒增强了共敏化太阳电池的光吸收能力、 增加了电荷载流子数量, 促进了电子有效注入, 具有十分广阔的应用空间.
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Acknowledgements
The authors thank the financial support from the National Key Research and Development Program of China (2016YFA0201001), the National Natural Science Foundation of China (11627801, 51102172 and 11772207), Science and Technology Plan of Shenzhen City (JCYJ20160331191436180), the Leading Talents of Guangdong Province Program (2016LJ06C372), the Natural Science Foundation for Outstanding Young Researcher in Hebei Province (E2016210093), the Key Program of Educational Commission of Hebei Province of China (ZD2016022), the Youth Top-notch Talents Supporting Plan of Hebei Province, the Graduate Innovation Foundation of Shijiazhuang Tiedao University, Hebei Provincial Key Laboratory of Traffic Engineering materials, and Hebei Key Discipline Construction Project.
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Jinjin Zhao obtained her BE degree in materials science and engineering from Hebei University of Science and Technology in 2005, and her PhD in materials physics and chemistry from Shanghai Institute of Ceramics, Chinese Academy of Sciences in 2010. She did her visiting doctoral studies at Max Plank Institute of Colloids and Interfaces, Germany, from October 2007 to October 2008, and visiting scholar at the University of Washington from August 2015 to August 2016. She helds faculty appointment in Shijiazhuang Tiedao University. She is interested in probing multi-physical couplings in perovskite solar cells based on dynamic photovoltaic thermal strain.
Zhenghao Liu obtained his BE degree in materials physics from Inner Mongolia University of Technology in 2013, and now he is a master degree candidate in the School of Materials Science and Engineering from Shijiazhuang Tiedao University. He is interested in performing quantum dots sensitized solar cells.
Jinxi Liu received his BE degree in engineering mechanics in 1982 from Liaoning University of Engineering Technology, Fuxin, China, and his MS and PhD degrees in 1988 and 1997 from Harbin Institute of Technology. He was a visiting professor at the Department of Mechanical Engineering of the University of Hong Kong under Croucher Foundation from 2000 to 2001. He is now a professor at the Department of Engineering Mechanics, Shijiazhuang Tiedao University. His research interests are the mechanics problems of photovoltaic, piezoelectric and magneto-electric materials and structures.
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Enhanced Performance of Solar Cells via Anchoring CuGaS2 Quantum Dots
Enhanced performance of solar cells via anchoring CuGaS2 quantum dots
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Zhao, J., Liu, Z., Tang, H. et al. Enhanced performance of solar cells via anchoring CuGaS2 quantum dots. Sci. China Mater. 60, 829–838 (2017). https://doi.org/10.1007/s40843-017-9078-1
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DOI: https://doi.org/10.1007/s40843-017-9078-1