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Magnesium‐doped Zinc Oxide as Electron Selective Contact Layers for Efficient Perovskite Solar Cells
Author(s) -
Song Jiaxing,
Zheng Enqiang,
Liu Leijing,
Wang XiaoFeng,
Chen Gang,
Tian Wenjing,
Miyasaka Tsutomu
Publication year - 2016
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201600860
Subject(s) - trihalide , thermal stability , materials science , energy conversion efficiency , perovskite (structure) , thermostability , doping , halide , zinc , chemical engineering , band gap , inorganic chemistry , optoelectronics , chemistry , organic chemistry , engineering , metallurgy , enzyme
The electron‐selective contact layer (ESL) in organometal halide‐based perovskite solar cells (PSCs) determines not only the power conversion efficiency (PCE) but also the thermostability of PSCs. To improve the thermostability of ZnO‐based PSCs, we developed Mg‐doped ZnO [Zn 1− x Mg x O (ZMO)] as a high optical transmittance ESL for the methylammonium lead trihalide perovskite absorber [CH 3 NH 3 PbI 3 ]. We further investigated the optical and electrical properties of the ESL films with Mg contents of 0–30 mol % and the corresponding devices. We achieved a maximum PCE of 16.5 % with improved thermal stability of CH 3 NH 3 PbI 3 on ESL with the optimal ZMO (0.4 m ) containing 10 mol % Mg. Moreover, this optimized ZMO PSC exhibited significantly improved durability and photostability owing to the improved chemical/photochemical stability of the wider optical bandgap ZMO.