title: Low-temperature solution-processed perovskite solar cells with high efficiency and flexibility.
abstract: Perovskite compounds have attracted recently great attention in photovoltaic research. The devices are typically fabricated using condensed or mesoporous TiO2 as the electron transport layer and 2,2'7,7'-tetrakis-(N,N-dip-methoxyphenylamine)9,9'-spirobifluorene as the hole transport layer. However, the high-temperature processing (450 °C) requirement of the TiO2 layer could hinder the widespread adoption of the technology. In this report, we adopted a low-temperature processing technique to attain high-efficiency devices in both rigid and flexible substrates, using device structure substrate/ITO/PEDOT:PSS/CH(3)NH(3)PbI(3-x)Cl(x)/PCBM/Al, where PEDOT:PSS and PCBM are used as hole and electron transport layers, respectively. Mixed halide perovskite, CH(3)NH(3)PbI(3-x)Cl(x), was used due to its long carrier lifetime and good electrical properties. All of these layers are solution-processed under 120 °C. Based on the proposed device structure, power conversion efficiency (PCE) of 11.5% is obtained in rigid substrates (glass/ITO), and a 9.2% PCE is achieved for a polyethylene terephthalate/ITO flexible substrate.
authors.affiliation: Department of Materials Science and Engineering and ‡California NanoSystems Institute, University of California-Los Angeles , Los Angeles, California 90095, United States.
authors.forename: Jingbi
authors.initials: J
authors.lastname: You
authors.forename: Ziruo
authors.initials: Z
authors.lastname: Hong
authors.forename: Yang Michael
authors.initials: YM
authors.lastname: Yang
authors.forename: Qi
authors.initials: Q
authors.lastname: Chen
authors.forename: Min
authors.initials: M
authors.lastname: Cai
authors.forename: Tze-Bin
authors.initials: TB
authors.lastname: Song
authors.forename: Chun-Chao
authors.initials: CC
authors.lastname: Chen
authors.forename: Shirong
authors.initials: S
authors.lastname: Lu
authors.forename: Yongsheng
authors.initials: Y
authors.lastname: Liu
authors.forename: Huanping
authors.initials: H
authors.lastname: Zhou
authors.forename: Yang
authors.initials: Y
authors.lastname: Yang