Bright and efficient light-emitting diodes based on MA/Cs double cation perovskite nanocrystals

Bing Xu; Weigao Wang; Xiaoli Zhang; Wanyu Cao; Dan Wu; Sheng Liu; Haitao Dai; Shuming Chen; Kai Wang; Xiaowei Sun

doi:10.1039/C7TC01300K

Bright and efficient light-emitting diodes based on MA/Cs double cation perovskite nanocrystals†

Bing Xu,

‡^ab Weigao Wang,‡^a Xiaoli Zhang,^ab Wanyu Cao,^c Dan Wu,^d Sheng Liu,^b Haitao Dai,^c Shuming Chen,

*^a Kai Wang*^a and Xiaowei Sun*^a

Author affiliations

* Corresponding authors

^a Department of Electrical & Electronic Engineering, Sourthern University of Science and Technology, Shenzhen, China
E-mail: chensm@sustc.edu.cn, wangk@sustc.edu.cn, sunxw@sustc.edu.cn

^b School of Power and Mechanical Engineering, Wuhan University, Wuhan, China

^c Tianjin Key Laboratory of Low Dimensional Materials Physics and Preparing Technology, School of Science, Tianjin University, Tianjin 300072, China

^d School of Electrical & Electronic Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore

Abstract

A high quantum yield, tunable band gap, and high color purity of perovskite nanocrystals make this class of materials attractive for electronic and optoelectronic applications in devices including solar cells, photodetectors, and light emitting diodes. Herein, we report for the first time the facile synthesis of perovskite nanocrystals based on (CH₃NH₃)_1−xCs_xPbBr₃. The emission properties, photoluminescence and stability of the mixed-cation perovskite nanocrystals have been intensively studied, which are significantly related to the content of cesium in the composition. The as-obtained (CH₃NH₃)_1−xCs_xPbBr₃ nanocrystals were employed as the emission layer in perovskite light emitting diodes, and the device fabricated with the optimized perovskite nanocrystals (Cs doping x = 0.3) showed a maximum luminescence of 24 500 cd m⁻², nearly ten-fold higher than those for the previous reported perovskite devices based on MAPbBr₃ nanocrystals. This study opens a new avenue for the fabrication of efficient perovskite nanocrystals and provides great potential of developing perovskite LEDs based on mixed-cation perovskite nanocrystals.

This article is part of the themed collection: 2017 Journal of Materials Chemistry C HOT Papers

Journal of Materials Chemistry C

Bright and efficient light-emitting diodes based on MA/Cs double cation perovskite nanocrystals†

Abstract

Associated articles

Supplementary files

Article information

Download Citation

Permissions

Bright and efficient light-emitting diodes based on MA/Cs double cation perovskite nanocrystals

Social activity

Search articles by author

Spotlight

Advertisements