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Dopant‐Free Hole Transport Materials Afford Efficient and Stable Inorganic Perovskite Solar Cells and Modules
Author(s) -
Liu Cheng,
Igci Cansu,
Yang Yi,
Syzgantseva Olga A.,
Syzgantseva Maria A.,
Rakstys Kasparas,
Kanda Hiroyuki,
Shibayama Naoyuki,
Ding Bin,
Zhang Xianfu,
Jankauskas Vygintas,
Ding Yong,
Dai Songyuan,
Dyson Paul J.,
Nazeeruddin Mohammad Khaja
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202107774
Subject(s) - dopant , materials science , perovskite (structure) , doping , band gap , optoelectronics , nanotechnology , phase (matter) , energy conversion efficiency , chemical engineering , chemistry , organic chemistry , engineering
The emerging CsPbI 3 perovskites are highly efficient and thermally stable materials for wide‐band gap perovskite solar cells (PSCs), but the doped hole transport materials (HTMs) accelerate the undesirable phase transition of CsPbI 3 in ambient. Herein, a dopant‐free D‐π‐A type HTM named CI‐TTIN‐2F has been developed which overcomes this problem. The suitable optoelectronic properties and energy‐level alignment endow CI‐TTIN‐2F with excellent charge collection properties. Moreover, CI‐TTIN‐2F provides multisite defect‐healing effects on the defective sites of CsPbI 3 surface. Inorganic CsPbI 3 PSCs with CI‐TTIN‐2F HTM feature high efficiencies up to 15.9 %, along with 86 % efficiency retention after 1000 h under ambient conditions. Inorganic perovskite solar modules were also fabricated that exhibiting an efficiency of 11.0 % with a record area of 27 cm 2 . This work confirms that using efficient dopant‐free HTMs is an attractive strategy to stabilize inorganic PSCs for their future scale‐up.