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20% Efficient Perovskite Solar Cells with 2D Electron Transporting Layer
Author(s) -
Zhao Xiaojuan,
Liu Shuangshuang,
Zhang Haitao,
Chang ShengYung,
Huang Wenchao,
Zhu Bowen,
Shen Yan,
Shen Cai,
Wang Deyu,
Yang Yang,
Wang Mingkui
Publication year - 2019
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.201805168
Subject(s) - perovskite (structure) , materials science , stacking , passivation , layer (electronics) , energy conversion efficiency , nucleation , electron , perovskite solar cell , optoelectronics , planar , nanotechnology , chemical engineering , chemistry , physics , computer graphics (images) , organic chemistry , quantum mechanics , computer science , engineering
Herein, a 2D SnS 2 electron transporting layer is reported via self‐assembly stacking deposition for highly efficient planar perovskite solar cells, achieving over 20% power conversion efficiency under AM 1.5 G 100 mW cm −2 light illumination. To the best of the authors' knowledge, this represents the highest efficiency that has so far been reported for perovskite solar cells using a 2D electron transporting layer. The large‐scaled 2D multilayer SnS 2 sheet structure triggers a heterogeneous nucleation over the perovskite precursor film. The intermolecular Pb⋅⋅⋅S interactions between perovskite and SnS 2 could passivate the interfacial trap states, which suppress charge recombination and thus facilitate electron extraction for balanced charge transport at interfaces between electron transporting layer/perovskite and hole transporting layer/perovskite. This work demonstrates that 2D materials have great potential for high‐performance perovskite solar cells.