title: A facile one-step solution deposition via non-solvent/solvent mixture for efficient organometal halide perovskite light-emitting diodes.
abstract: Although organometal halide perovskite materials have shown great potential in light-emitting diodes, their performance is greatly restricted by the poor morphology of the perovskite layer. In this work, we demonstrate a facile one-step solution method to improve the perovskite film morphology via a non-solvent/solvent mixture. An efficient CH3NH3PbBr3-based light-emitting diode was prepared with a chlorobenzene/N,N-dimethylformamide mixed solvent. A high efficiency of 0.54 cd A(-1) is demonstrated, which is 22 times higher than that of a device fabricated by a traditional one-step solution process. Furthermore, the uniformity of the emission region and the device stability are strongly improved by this facile one-step solution process. Our work paves a new way for the morphological control of perovskite films for application in light-emitting diodes.
authors.affiliation: Key Laboratory for Physical Electronics and Devices of the Ministry of Education & Shannxi Key Lab of Information Photonic Technique, School of Electronic and Information Engineering, Xi'an Jiaotong University, No. 28, Xianning West Road, Xi'an, 710049, China. zhaoxinwu@mail.xjtu.edu.cn.
authors.forename: Bo
authors.initials: B
authors.lastname: Jiao
authors.forename: Xiaobo
authors.initials: X
authors.lastname: Zhu
authors.forename: Wen
authors.initials: W
authors.lastname: Wu
authors.forename: Hua
authors.initials: H
authors.lastname: Dong
authors.forename: Bin
authors.initials: B
authors.lastname: Xia
authors.forename: Jun
authors.initials: J
authors.lastname: Xi
authors.forename: Ting
authors.initials: T
authors.lastname: Lei
authors.forename: Xun
authors.initials: X
authors.lastname: Hou
authors.forename: Zhaoxin
authors.initials: Z
authors.lastname: Wu