title: Perovskite Photodetectors based on CH3NH3PbI3Single Crystals.
abstract: As very important light-harvesting materials, organic-inorganic perovskites have showed an alluring prospect in optoelectronic devices. However, most of the perovskite devices, such as photodetectors reported recently, are based on the polycrystalline films of perovskites, and the large grain boundaries and amounts of defects existing in films are unfavorable for the further improvement of device performance. Herein, high-quality single crystals of CH3NH3PbI3were successfully prepared through a simple solution immersing method. The obtained CH3NH3PbI3crystals showed the morphologies of nanowires and nanoplates, which were confirmed to belong to the same tetragonal phase. Both nanowire- and nanoplate-based photodetectors exhibited improved performance over CH3NH3PbI3polycrystalline thin films, with an on/off ratio approaching 103, which is one of the highest values reported so far for perovskite photodetectors.
authors.affiliation: Beijing National laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.|University of Chinese Academy of Sciences, Beijing, 100039, China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Qin
authors.affiliation: Beijing National laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.|University of Chinese Academy of Sciences, Beijing, 100039, China.
authors.forename: Yifan
authors.initials: Y
authors.lastname: Yao
authors.affiliation: Beijing National laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China. dhl522@iccas.ac.cn.
authors.forename: Huanli
authors.initials: H
authors.lastname: Dong
authors.affiliation: Beijing National laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
authors.forename: Yonggang
authors.initials: Y
authors.lastname: Zhen
authors.affiliation: Beijing National laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.
authors.forename: Lang
authors.initials: L
authors.lastname: Jiang
authors.affiliation: Beijing National laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China. huwp@iccas.ac.cn.|Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Department of Chemistry, School of Sciences, Tianjin University, Collaborative Innovation Center of Chemical Science and Engineering, Tianjin, 300072, China. huwp@iccas.ac.cn.
authors.forename: Wenping
authors.initials: W
authors.lastname: Hu
keywords: CH3NH3PbI3; nanoplates; nanowires; perovskites; photodetectors; single crystals