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Soft Template‐Controlled Growth of High‐Quality CsPbI 3 Films for Efficient and Stable Solar Cells
Author(s) -
Liu Cheng,
Yang Yi,
Xia Xin,
Ding Yong,
Arain Zulqarnain,
An Shijie,
Liu Xuepeng,
Cristina Roldán Carmona,
Dai Songyuan,
Nazeeruddin Mohammad Khaja
Publication year - 2020
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.201903751
Subject(s) - materials science , energy conversion efficiency , perovskite (structure) , solar cell , chemical engineering , nucleation , tin oxide , indium tin oxide , thermal stability , perovskite solar cell , non blocking i/o , doping , optoelectronics , nanotechnology , thin film , catalysis , chemistry , biochemistry , organic chemistry , engineering
The unfavorable morphology and inefficient utilization of phase transition reversibility have limited the high‐temperature‐processed inorganic perovskite films in both efficiency and stability. Here, a simple soft template‐controlled growth (STCG) method is reported by introducing (adamantan‐1‐yl)methanammonium to control the nucleation and growth rate of CsPbI 3 crystals, which gives rise to pinhole‐free CsPbI 3 film with a grain size on a micrometer scale. The STCG‐based CsPbI 3 perovskite solar cell exhibits a power conversion efficiency of 16.04% with significantly reduced defect densities and charge recombination. More importantly, an all‐inorganic solar cell with the architecture fluorine‐doped tin oxide (FTO)/NiO x /STCG‐CsPbI 3 /ZnO/indium‐doped tin oxide (ITO) is successfully fabricated to demonstrate its real advantage in thermal stability. By suppressing the inductive effect of defects during the phase transition and utilizing the unique reversibility of the phase transition for the high‐temperature‐processed CsPbI 3 film, the all‐inorganic solar cell retains 90% of its initial efficiency after 3000 h of continuous light soaking and heating.