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Enhanced Crystallization and Optimized Morphology of Perovskites Through Doping an Indium‐Based Metal–Organic Assembly: Achieving Significant Solar Cell Efficiency Enhancements
Author(s) -
Li Mengru,
Xia Debin,
Jiang Aifeng,
Du Xi,
Fan Xiao,
Qiu Lele,
Wang Ping,
Fan Ruiqing,
Yang Yulin
Publication year - 2019
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.201900027
Subject(s) - perovskite (structure) , materials science , crystallization , energy conversion efficiency , iodide , chemical engineering , metal , perovskite solar cell , doping , solar cell , nanotechnology , inorganic chemistry , optoelectronics , chemistry , metallurgy , engineering
Perovskite crystallization and morphology are two essential factors to the photoelectric performances of perovskite solar cells (PSCs). A 3D metal–organic assembly [In 2 (phen) 3 Cl 6 ]·CH 3 CN·2H 2 O (In2) is introduced for the first time into lead iodide precursor to modify the quality of a perovskite thin film through a two‐step sequential deposition method. As a result, both the lead iodide and perovskite exhibit improved crystallization and modified morphology. The optimized film presents less trap states and is thus in favor of the charge transfer as well as charge collection. Consequently, open circuit voltage ( V oc ) and fill factor obviously show enhancements from 0.99 to 1.04 V and from 0.66 to 0.71, respectively, yielding a significant increase in a power conversion efficiency from 15.41% to 17.15%. Meanwhile, the hydrophobic property of In2 can increase the moisture resistance of the perovskite, which offers a simple and effective method to improve the stability of PSCs.