2D-Quasi-2D-3D Hierarchy Structure for Tin Perovskite Solar Cells with Enhanced Efficiency and Stability
2D-Quasi-2D-3D Hierarchy Structure for Tin Perovskite Solar Cells with Enhanced Efficiency and Stability
复制标题
提高效率和稳定性的锡钙钛矿太阳能电池的 2D-准2D-3D 层次结构
DOI:
10.1016/j.joule.2018.09.012
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发表时间:
2018-12
期刊:
影响因子:
39.8
通讯作者:
Zhijun Ning
中科院分区:
文献类型:
--
作者:
Fei Wang;Xianyuan Jiang;Hao Chen;Yuequn Shang;Hefei Liu;Jingle Wei;Wenjia Zhou;Hailong He;Weimin Liu;Zhijun Ning
The power conversion efficiency (PCE) of tin perovskite solar cells is impeded by the extremely poor resistance to oxidation and high density of intrinsic Sn vacancies. Herein, we grow a 2D-quasi-2D-3D Sn perovskite film using removable pseudohalogen NH4SCN as a structure regulator. This hierarchy structure remarkably enhances air stability resulting from the parallel growth of 2D PEA2SnI4as the surface layer. We then explore the hierarchy structure perovskite films in planar structural solar cells, which generate a PCE up to 9.41%. The device retains 90% of its initial performance for almost 600 hr. Our results suggest that adding removable NH4SCN in a perovskite precursor can significantly improve the stability and photovoltaic performance of Sn perovskite. This finding provides a powerful strategy to manipulate the structure of low-dimensional perovskite in order to enhance the performance of perovskite solar cells.
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