Date2017-03-16/ Research Highlight
Recently, the team composed of Professor Xiaowei Sun, Assistant Professor Kai Wang and Shuming Chen from the Department of Electrical and Electronic Engineering of the College of Engineering, published their recent progress of high brightness perovskite quantum dot light-emitting diodes in Advanced Materials (impact factor: 18.96). This team has published 6 research articles last year on this topic in journals such as Advanced Energy Materials, Advanced Functional Materials, Nano Energy, ACS Applied Materials & Interfaces, with total impact of more than 76.
In the past few years, as a new type of semiconductor material, metal halide perovskite received widespread attention because of their excellent photoelectric properties in solar cells, light-emitting diodes, laser, light catalysis, memory storage etc. In just four years, the perovskite solar cells conversion efficiency increased from 3.8% to 22.1%, beyond the past ten years research progress of traditional amorphous silicon, dye sensitization and organic thin-film batteries. The perovskite solar cells has been rated as one of the top ten scientific advances by Science in 2013.
Compared with perovskite solar cells, the programs in light-emitting diodes research is relatively slow. Moreover, perovskite light-emitting diodes are primarily based on the thin film form. For the perovskite quantum dots, especially the organic cation (CH3NH3 (MA), CH(NH2)2 (FA)) perovskite, the related study is rare. Recently, The SUSTech team obtained perovskite quantum dot (FA(1−x)CsxPbBr3) based on organic-inorganic cation, which can be prepared at room temperature through solution synthesis. With the optimized inorganic cation Cs doping in CsxPbBr3, the perovskite light-emitting diodes exhibit excellent performance with luminance of 55005 cd m-2, current efficiency of 10.09 cd A-1. The related work is published in John Wiley’s Advanced Materials, titled "Hybrid Perovskite Light-Emitting Diodes-based on Perovskite Nanocrystals with Organic-Inorganic Mixed Cations". Southern University of Science and Technology is the first and the only corresponding organization for this work. The work is supported by National Science and Technology Major Project of the Ministry of Science and Technology of China, Shenzhen Peacock Team and Shenzhen Municipal Science and Technology Innovation Committee projects.