Journal
MATERIALS LETTERS
Volume 273, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2020.127979
Keywords
Solar energy materials; Thin films; Grain boundaries; Crystal growth; X-ray techniques
Funding
- Natural Science Foundation of China [61875186]
- project of the Natural Science Foundation of Beijing [Z160002]
- Key Research Projects of BISTU [2019 KYNH227]
- Beijing Key Laboratory for Sensors of BISTU [2019CGKF007]
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Perovskite components have tremendous influence on the film quality and device performance. There are obvious impurity defects, holes, etc. in the films of conventional perovskite solar cells (PSCs). In this work, the perovskite component was tuned to [HC(NH2)(2)](0).(3)(CH3NH3)(0).7PbI2.4Cl0.3Br0.3 (FA(0.3)MA(0.7)PbI(2.4)Cl(0.3)Br(0.3)) via cation and anion co-mixing, it was observed that the residual PbI 2 at perovskite film had a good passivation effect on the grain boundaries and further ameliorated the quality of the film. The photoelectric conversion efficiency (PCE) of low-cost carbon electrode-based photovoltaic devices we prepared increased from 8.58% to 12.40%. Our work will also be more beneficial to the commercialization of PSCs and the preparation of other optoelectronic devices. (C) 2020 Elsevier B.V. All rights reserved.
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