Open AccessThe Dawn of Lead‐Free Perovskite Solar Cell: Highly Stable Double Perovskite Cs 2 AgBiBr 6 Film
Author(s) -
Wu Cuncun,
Zhang Qiaohui,
Liu Yang,
Luo Wei,
Guo Xuan,
Huang Ziru,
Ting Hungkit,
Sun Weihai,
Zhong Xinrui,
Wei Shiyuan,
Wang Shufeng,
Chen Zhijian,
Xiao Lixin
Publication year - 2018
Publication title -
advanced science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.388
H-Index - 100
ISSN - 2198-3844
DOI - 10.1002/advs.201700759
Subject(s) - materials science , perovskite (structure) , solar cell , energy conversion efficiency , heterojunction , photovoltaic system , perovskite solar cell , optoelectronics , environmentally friendly , nanotechnology , chemical engineering , electrical engineering , ecology , engineering , biology
Recently, lead‐free double perovskites have emerged as a promising environmentally friendly photovoltaic material for their intrinsic thermodynamic stability, appropriate bandgaps, small carrier effective masses, and low exciton binding energies. However, currently no solar cell based on these double perovskites has been reported, due to the challenge in film processing. Herein, a first lead‐free double perovskite planar heterojunction solar cell with a high quality Cs 2 AgBiBr 6 film, fabricated by low‐pressure assisted solution processing under ambient conditions, is reported. The device presents a best power conversion efficiency of 1.44%. The preliminary efficiency and the high stability under ambient condition without encapsulation, together with the high film quality with simple processing, demonstrate promise for lead‐free perovskite solar cells.