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CsSnI 3 Solar Cells via an Evaporation‐Assisted Solution Method
Author(s) -
Zhu Pengchen,
Chen Chuanlu,
Gu Shuai,
Lin Renxing,
Zhu Jia
Publication year - 2018
Publication title -
solar rrl
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.544
H-Index - 37
ISSN - 2367-198X
DOI - 10.1002/solr.201700224
Subject(s) - evaporation , materials science , crystallization , tin , pinhole (optics) , photovoltaic system , energy conversion efficiency , perovskite (structure) , environmentally friendly , solar cell , thermal , chemical engineering , optoelectronics , nanotechnology , optics , electrical engineering , metallurgy , thermodynamics , physics , ecology , biology , engineering
The environmental friendly tin‐based perovskite is attracting a lot of attention as a lead‐free alternative in photovoltaic field. However, the uncontrollable quick crystallization of tin‐based perovskite in traditional solution methods makes it challenging to form smooth and pin‐hole free films, resulting in severe surface recombination and current leakage problem. Evaporation method, known as an effective way to produce smooth films with high coverage, has been rarely investigated in tin‐based perovskites. Here, we demonstrate an evaporation‐assisted solution (EAS) method in CsSnI 3 system, combining thermal evaporation with solution method, to produce rather uniform, dense and pinhole free CsSnI 3 films. Solar cells fabricated by our EAS method show an average power conversion efficiency (PCE) of 1.93% and a best PCE of 2.23%.