title: Nano-structured electron transporting materials for perovskite solar cells.
abstract: Organic-inorganic hybrid perovskite solar cells have been developing rapidly in the past several years, and their power conversion efficiency has reached over 20%, nearing that of polycrystalline silicon solar cells. Because the diffusion length of the hole in perovskites is longer than that of the electron, the performance of the device can be improved by using an electron transporting layer, e.g., TiO2, ZnO and TiO2/Al2O3. Nano-structured electron transporting materials facilitate not only electron collection but also morphology control of the perovskites. The properties, morphology and preparation methods of perovskites are reviewed in the present article. A comprehensive understanding of the relationship between the structure and property will benefit the precise control of the electron transporting process and thus further improve the performance of perovskite solar cells.
authors.affiliation: State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, China. lxxiao@pku.edu.cn qhgong@pku.edu.cn.
authors.forename: Hefei
authors.initials: H
authors.lastname: Liu
authors.affiliation: State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, China. lxxiao@pku.edu.cn qhgong@pku.edu.cn.
authors.forename: Ziru
authors.initials: Z
authors.lastname: Huang
authors.affiliation: State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, China. lxxiao@pku.edu.cn qhgong@pku.edu.cn.
authors.forename: Shiyuan
authors.initials: S
authors.lastname: Wei
authors.affiliation: State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, China. lxxiao@pku.edu.cn qhgong@pku.edu.cn.
authors.forename: Lingling
authors.initials: L
authors.lastname: Zheng
authors.affiliation: State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, China. lxxiao@pku.edu.cn qhgong@pku.edu.cn and Beijing Engineering Research Center for Active Matrix Display, Beijing 100871, China and New Display Device and System Integration Collaborative Innovation Center of the West Coast of the Taiwan Strait, Fuzhou 350002, China.
authors.forename: Lixin
authors.initials: L
authors.lastname: Xiao
authors.affiliation: State Key Laboratory for Mesoscopic Physics and Department of Physics, Peking University, Beijing 100871, China. lxxiao@pku.edu.cn qhgong@pku.edu.cn.
authors.forename: Qihuang
authors.initials: Q
authors.lastname: Gong