Статья

Impacts of alkaline on the defects property and crystallization kinetics in perovskite solar cells

Yihua ChenKey Laboratory for the Physics and Chemistry of Nanodevices, Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. ChinaNengxu LiKey Laboratory for the Physics and Chemistry of Nanodevices, Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. ChinaLigang WangKey Laboratory for the Physics and Chemistry of Nanodevices, Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. ChinaLiang LiKey Laboratory for the Physics and Chemistry of Nanodevices, Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. ChinaZiqi XuKey Laboratory for the Physics and Chemistry of Nanodevices, Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. ChinaHaoyang JiaoKey Laboratory for the Physics and Chemistry of Nanodevices, Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. ChinaPengfei LiuSchool of Material Science and Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. ChinaCheng ZhuSchool of Material Science and Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. ChinaHuachao ZaiSchool of Material Science and Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. ChinaMingzi SunDepartment of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong, 999077, P. R. ChinaWei ZouKey Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 211816, P. R. ChinaShuai ZhangCAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. ChinaGuichuan XingJoint Key Laboratory of the Ministry of Education, Institute of Applied Physics and Materials Engineering, University of Macau, Macau, 999078, P. R. ChinaXinfeng LiuCAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience, National Center for Nanoscience and Technology, Beijing, 100190, P. R. ChinaJianpu WangKey Laboratory of Flexible Electronics & Institute of Advanced Materials, Jiangsu National Synergetic Innovation Center for Advanced Materials, Nanjing Tech University, Nanjing, 211816, P. R. ChinaDongdong LiShanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201210, P. R. ChinaBolong HuangDepartment of Applied Biology and Chemical Technology, Hong Kong Polytechnic University, Hong Kong, 999077, P. R. ChinaQi ChenSchool of Material Science and Engineering, Beijing Institute of Technology, Beijing, 100081, P. R. ChinaHuanping ZhouKey Laboratory for the Physics and Chemistry of Nanodevices, Beijing Key Laboratory for Theory and Technology of Advanced Battery Materials, Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing, 100871, P. R. China. [email protected]

2019en

ABI

Аннотация

Further minimizing the defect state density in the semiconducting absorber is vital to boost the power conversion efficiency of solar cells approaching Shockley-Queisser limit. However, it lacks a general strategy to control the precursor chemistry for defects density reduction in the family of iodine based perovskite. Here the alkaline environment in precursor solution is carefully investigated as an effective parameter to suppress the incident iodine and affects the crystallization kinetics during film fabrication, via rationale adjustment of the alkalinity of additives. Especially, a 'residual free' weak alkaline is proposed not only to shrink the bandgap of the absorber by modulating the stoichiometry of organic cation, but also to improve the open circuit voltage in the resultant device. Consequently, the certified efficiency of 20.87% (Newport) is achieved with one of the smallest voltage deficits of 413 mV in the planar heterojunction perovskite solar cell.

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Идентификаторы

DOI: 10.1038/s41467-019-09093-1

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar