Open AccessLead-chelating hole-transport layers for efficient and stable perovskite minimodules
Author(s) -
Chengbin Fei,
Nengxu Li,
Mengru Wang,
Xiaoming Wang,
Hangyu Gu,
Bo Chen,
Zhao Zhang,
Zhenyi Ni,
Haoyang Jiao,
Wenzhan Xu,
Zhifang Shi,
Yanfa Yan,
Jinsong Huang
Publication year - 2023
Publication title -
science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 12.556
H-Index - 1186
eISSN - 1095-9203
pISSN - 0036-8075
DOI - 10.1126/science.ade9463
Subject(s) - perovskite (structure) , energy conversion efficiency , materials science , chelation , amorphous solid , aperture (computer memory) , renewable energy , chemical engineering , optoelectronics , chemistry , electrical engineering , crystallography , physics , metallurgy , acoustics , engineering
The defective bottom interfaces of perovskites and hole-transport layers (HTLs) limit the performance of p-i-n structure perovskite solar cells. We report that the addition of lead chelation molecules into HTLs can strongly interact with lead(II) ion (Pb 2+ ), resulting in a reduced amorphous region in perovskites near HTLs and a passivated perovskite bottom surface. The minimodule with an aperture area of 26.9 square centimeters has a power conversion efficiency (PCE) of 21.8% (stabilized at 21.1%) that is certified by the National Renewable Energy Laboratory (NREL), which corresponds to a minimal small-cell efficiency of 24.6% (stabilized 24.1%) throughout the module area. Small-area cells and large-area minimodules with lead chelation molecules in HTLs had a light soaking stability of 3010 and 2130 hours, respectively, at an efficiency loss of 10% from the initial value under 1-sun illumination and open-circuit voltage conditions.
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