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Phosphotungstic Acid Regulated Chemical Bath Deposition of Sb 2 S 3 for High‐Efficiency Planar Heterojunction Solar Cell
Author(s) -
Zhang Yan,
Li Shi'ang,
Tang Rongfeng,
Wang Xiaomin,
Chen Chao,
Lian Weitao,
Zhu Changfei,
Chen Tao
Publication year - 2018
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201800238
Subject(s) - heterojunction , chemical bath deposition , energy conversion efficiency , phosphotungstic acid , solar cell , materials science , crystallinity , deposition (geology) , chemical engineering , chemical deposition , planar , impurity , oxide , inorganic chemistry , thin film , optoelectronics , chemistry , nanotechnology , organic chemistry , catalysis , paleontology , computer graphics (images) , sediment , computer science , engineering , metallurgy , composite material , biology
Abstract Chemical bath deposition is a convenient method for preparing Sb 2 S 3 film which is considered as a promising photovoltaic material. However, impurity phases such as Sb 2 O 3 , SbOCl, Sb 2 (SO 4 ) 3 and Sb(OH) 3 are inevitably generated in this solution process. Herein, we demonstrate that phosphotungstic acid in the precursor solution is able to suppress the formation of oxide and oxyhalide by‐products, leading to considerably optimized composition and crystallinity for solar cell applications. With this method, a remarkable improvement of power conversion efficiency from 1.91 % to 4.61 % is obtained, which is also the highest efficiency in planar heterojunction solar cells by solution processed Sb 2 S 3 absorber layer.