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An Efficient Approach to Fabricate Air‐Stable Perovskite Solar Cells via Addition of a Self‐Polymerizing Ionic Liquid
Author(s) -
Xia Rui,
Gao XiaoXin,
Zhang Yi,
Drigo Nikita,
Queloz Valentin I. E.,
Tirani Farzaneh Fadaei,
Scopelliti Rosario,
Huang Zhangjun,
Fang Xiaodong,
Kinge Sachin,
Fei Zhaofu,
RoldánCarmona Cristina,
Nazeeruddin Mohammad Khaja,
Dyson Paul J.
Publication year - 2020
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.202003801
Subject(s) - materials science , perovskite (structure) , relative humidity , inert , photovoltaic system , ionic liquid , chemical engineering , ionic bonding , polymerization , humidity , nanotechnology , catalysis , ion , organic chemistry , polymer , composite material , meteorology , chemistry , ecology , physics , engineering , biology
Despite the excellent photovoltaic properties achieved by perovskite solar cells at the laboratory scale, hybrid perovskites decompose in the presence of air, especially at high temperatures and in humid environments. Consequently, high‐efficiency perovskites are usually prepared in dry/inert environments, which are expensive and less convenient for scale‐up purposes. Here, a new approach based on the inclusion of an in situ polymerizable ionic liquid, 1,3‐bis(4‐vinylbenzyl)imidazolium chloride ([bvbim]Cl), is presented, which allows perovskite films to be manufactured under humid environments, additionally leading to a material with improved quality and long‐term stability. The approach, which is transferrable to several perovskite formulations, allows efficiencies as high as 17% for MAPbI 3 processed in air % relative humidity (RH) ≥30 (from an initial 15%), and 19.92% for FAMAPbI 3 fabricated in %RH ≥50 (from an initial 17%), providing one of the best performances to date under similar conditions.