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Stable Inverted Planar Perovskite Solar Cells with Low‐Temperature‐Processed Hole‐Transport Bilayer
Author(s) -
Zhou Zhongmin,
Li Xing,
Cai Molang,
Xie Fengxian,
Wu Yongzhen,
Lan Zhang,
Yang Xudong,
Qiang Yinghuai,
Islam Ashraful,
Han Liyuan
Publication year - 2017
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.201700763
Subject(s) - materials science , bilayer , perovskite (structure) , indium tin oxide , graphene , energy conversion efficiency , substrate (aquarium) , oxide , optoelectronics , chemical engineering , planar , nanotechnology , layer (electronics) , membrane , genetics , computer graphics (images) , computer science , engineering , biology , oceanography , geology , metallurgy
Low‐temperature‐processed perovskite solar cells (PSCs), which can be fabricated on rigid or flexible substrates, are attracting increasing attention because they have a wide range of potential applications. In this study, the stability of reduced graphene oxide and the ability of a poly(triarylamine) underlayer to improve the quality of overlying perovskite films to construct hole‐transport bilayer by means of a low‐temperature method are taken advantage of. The bilayer is used in both flexible and rigid inverted planar PSCs with the following configuration: substrate/indium tin oxide/reduced graphene oxide/polytriarylamine/CH 3 NH 3 PbI 3 /PCBM/bathocuproine/Ag (PCBM = [6,6]‐phenyl‐C 61 ‐butyric acid methyl ester). The flexible and rigid PSCs show power conversion efficiencies of 15.7 and 17.2%, respectively, for the aperture area of 1.02 cm 2 . Moreover, the PSC based the bilayer shows outstanding light‐soaking stability, retaining ≈90% of its original efficiency after continuous illumination for 500 h at 100 mW cm −2 .