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In situ deposition of black α-FAPbI3 films by vacuum flash evaporation for solar cells

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Abstract

Formamidinium lead iodide (FAPbI3) is a promising candidate as the solar cell absorption layer with a suitable band gap of 1.45 eV and excellent optoelectronic properties. In this work, we report a new vacuum flash evaporation method to deposit phase-pure black α-FAPbI3 films in situ on low-temperature substrates without post-annealing, and the area of deposited films can be up to 36 cm2 (6 cm × 6 cm). Besides, the unique relationship between substrate temperature and phases in films is demonstrated for the further development of the method. With the α-FAPbI3 films as the active layer, perovskite solar cells with power conversion efficiency of 12.55% are fabricated.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (Grant Nos. 51872186 and 51672172), the Zhejiang Provincial Natural Science Foundation (Grant No. LQ19F040002), and the Scientific and Technical Plan Project of Shaoxing City (Grant No. 2017B70063). The authors also thank Instrumental Analysis and Research Center of Shanghai University for XRD and SEM measurement.

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Authors and Affiliations

  1. Department of Physics, Shaoxing University, Shaoxing, 312000, China

    Fuzong Xu, Liya Zeng, Bo Yao, Zebo Fang & Haitao Xu

  2. School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China

    Fuzong Xu, Yongshang Tian, Wenzhen Wang, Yanyan Zhu, Run Xu & Linjun Wang

  3. SHU-Solar E R&D Lab, Department of Physics, Shanghai Key Laboratory of High Temperature Superconductors, Shanghai University, Shanghai, 200444, China

    Fei Xu & Feng Hong

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  1. Fuzong Xu
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Correspondence to Haitao Xu, Run Xu or Fei Xu.

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Xu, F., Tian, Y., Wang, W. et al. In situ deposition of black α-FAPbI3 films by vacuum flash evaporation for solar cells. J Mater Sci: Mater Electron 30, 8381–8389 (2019). https://doi.org/10.1007/s10854-019-01155-w

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