5 years ago

Stable Inverted Planar Perovskite Solar Cells with Low-Temperature-Processed Hole-Transport Bilayer

Stable Inverted Planar Perovskite Solar Cells with Low-Temperature-Processed Hole-Transport Bilayer
Yinghuai Qiang, Yongzhen Wu, Molang Cai, Xing Li, Zhongmin Zhou, Liyuan Han, Zhang Lan, Ashraful Islam, Xudong Yang, Fengxian Xie
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/CH3NH3PbI3/PCBM/bathocuproine/Ag (PCBM = [6,6]-phenyl-C61-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 cm2. 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. Low-temperature-processed hole-transport bilayer (reduced graphene oxide/polytriarylamine) is constructed to fabricate inverted perovskite solar cells (PSCs), which based on flexible and rigid substrates show power conversion efficiencies of 15.7 and 17.2% on the cells area of 1.02 cm2, respectively. In addition, the PSCs with the hole-transport bilayer show outstanding light-soaking stability.

Publisher URL: http://onlinelibrary.wiley.com/resolve/doi

DOI: 10.1002/aenm.201700763

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