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Metal Oxide CrO x as a Promising Bilayer Electron Transport Material for Enhancing the Performance Stability of Planar Perovskite Solar Cells (Solar RRL 6∕2018)
Author(s) -
Zheng Shizhao,
Li Wenlang,
Su Tongtong,
Xie Fangyan,
Chen Jian,
Yang Zhiyong,
Zhang Yi,
Liu Siwei,
Aldred Matthew P.,
Wong King Young,
Xu Jiarui,
Chi Zhenguo
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.2017700176
Subject(s) - materials science , bilayer , perovskite (structure) , electrode , perovskite solar cell , solar cell , oxide , metal , layer (electronics) , energy conversion efficiency , chemical engineering , optoelectronics , nanotechnology , chemistry , metallurgy , membrane , biochemistry , engineering
CrO x as a bilayer electron transport material could enhance the device stability of a perovskite solar cell by more than 10 times in ambient conditions without any encapsulation and, furthermore, it improves the efficiency by 17.5% compared to that using PC 61 BM only, as shown by Shizhao Zheng et al. in article number 1700245 . The improved performance is attributed to the better matching of the energy levels of the active layer with the metal electrode and a more effective electron collection. It was also found that the use of CrO x as a passivating layer could resist the diffusion of water and oxygen into the active layer and prevent the reaction of the metal electrode with the perovskite layer.