Premium
Morphology Controlling of All‐Inorganic Perovskite at Low Temperature for Efficient Rigid and Flexible Solar Cells
Author(s) -
Rao Haixia,
Ye Senyun,
Gu Feidan,
Zhao Ziran,
Liu Zhiwei,
Bian Zuqiang,
Huang Chunhui
Publication year - 2018
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201800758
Subject(s) - materials science , perovskite (structure) , halide , energy conversion efficiency , chemical engineering , crystallization , indium tin oxide , thermal stability , perovskite solar cell , non blocking i/o , annealing (glass) , photovoltaic system , nanotechnology , optoelectronics , thin film , inorganic chemistry , composite material , catalysis , organic chemistry , chemistry , ecology , engineering , biology
All‐inorganic cesium lead halide (CsPbX 3 ) perovskites have emerged as promising photovoltaic materials owing to their superior thermal stability compared to traditional organic–inorganic hybrid counterparts. However, the CsPbX 3 perovskites generally need to be prepared at high‐temperature, which restricts their application in multilayer or flexible solar cells. Herein, the formation of CsPbX 3 perovskites at room‐temperature (RT) induced by dimethylsulphoxide (DMSO) coordination is reported. It is further found that a RT solvent (DMSO) annealing (RTSA) treatment is valid to control the perovskite crystallization dynamics, leading to uniform and void‐free films, and consequently a maximum power conversion efficiency (PCE) of 6.4% in the device indium tin oxide (ITO)/NiO x /RT‐CsPbI 2 Br/C 60 /Bathocuproine (BCP)/Ag, which is, as far as it is known, the first report of RT solution‐processed CsPbX 3 ‐based perovskite solar cells (PSCs). Moreover, the efficiency can be boosted up to 10.4% by postannealing the RTSA‐treated perovskite film at an optimal temperature of 120 °C. Profiting from the moderate temperature, flexible PSCs are also demonstrated with a maximum PCE of 7.3% for the first time. These results may stimulate further development of all‐inorganic CsPbX 3 perovskites and their application in flexible electronics.