期刊
ELECTROCHIMICA ACTA
卷 247, 期 -, 页码 460-467出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2017.07.040
关键词
Compositional modulation; Mixed organic cation; Enhanced photoelectric performance; Long term stability; Perovskite solar cells
资金
- National Natural Science Foundation of China [51572098, 51272080]
- Fund for Strategy Emerging Industries of Shenzhen [JCY20150630155150208]
- Natural Science Foundation of Hubei Province [2015CFB432]
- Open Fund of State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology [2016-KF-5]
- Technology innovation fund project of Huazhong University of Science and Technology Innovation Research College
Preparation of high-quality and pure phase mixed-organic-cation FA(1-x)MA(x)PbI(3) perovskite film is a big challenge, especially on a porous oxide scaffold for mesoscopic perovskite solar cells. In this study, we fabricated a pure phase of mixed-organic-cation perovskite FA(1-x)MA(x)PbI(3) simply using a conventional two-step method. Effect of chemical composition and morphology on the photovoltaic performance and stability of the mixed-organic-cation perovskite has been studied in details. Results show that the FA(1-x)MA(x)PbI(3) perovskite thin films with a FA(+): MA(+) molar ratio of 0.7:0.3 demonstrate the best photovoltaic performance. Mesoscopic perovskite solar cells fabricated using these FA(0.7)MA(0.3)PbI(3) thin films yield a power conversion efficiency (PCE) up to 16.0%. Moreover, the devices present a superior stability and the unsealed devices exposed in ambient condition (25 degrees C, 50%-60% relative humidity) can maintain their photoelectric performance without apparent PCE loss for up to 20 days. (C) 2017 Elsevier Ltd. All rights reserved.
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