Investigation of CsPbBr3 films with controllable morphology and its influence on the photovoltaic properties for carbon-based planar perovskite solar cells

Recently, inorganic CsPbBr3 perovskites have received much research interest in the photovoltaic field owing to their excellent stability. However, it is still challenging to prepare high-performance CsPbBr3 films with good crystallinity and superior morphology at moderate temperatures. In this work...

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Bibliographic Details
Published in:Applied optics (2004) 2020-06, Vol.59 (18), p.5481
Main Authors: Zhao, Fei, Guo, Yixin, Tao, Jiahua, Li, Zeng, Jiang, Jinchun, Chu, Junhao
Format: Article
Language:English
Subjects:
Cesium bromides
Crystal structure
Crystallinity
Deposition
Energy conversion efficiency
Maximum power
Morphology
Perovskites
Photovoltaic cells
Solar cells
Spin coating
Stability
Titanium dioxide
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Summary:Recently, inorganic CsPbBr3 perovskites have received much research interest in the photovoltaic field owing to their excellent stability. However, it is still challenging to prepare high-performance CsPbBr3 films with good crystallinity and superior morphology at moderate temperatures. In this work, we report a novel, to the best of our knowledge, multistep spin-coating deposition method to prepare CsPbBr3 perovskite film. Through optimizing the number of deposition cycles of a CsBr solution, CsPbBr3 films containing high phase purity, good crystallinity, and strong absorption are obtained. The inorganic planar perovskite solar cell with optimized CsPbBr3 film realizes a maximum power conversion efficiency of 4.70% under standard solar illumination conditions. Moreover, our devices with FTO/TiO2/CsPbBr3/CuPc/C exhibit fabulous stability when stored in an ambient atmosphere with ∼40% humidity for 60 days. Our work provides new opportunities for facilitating practical application of CsPbBr3 planar perovskite solar cells.
ISSN:1559-128X
2155-3165
DOI:10.1364/AO.392404