报告时间：2022年09月29日（星期四）16:30-17:30

报告地点：逸夫楼1009

报 告 人：肖正国 教授

工作单位：中国科学技术大学

举办单位：电气与自动化工程学院

报告简介：

Metal-halide perovskites are emerging as a new generation of solution processed semiconducting materials with fantastic optoelectronic properties. Solar cells and light-emitting diodes (LEDs) incorporating these perovskites are rapidly becoming serious contenders to rival the leading technologies. Photovoltaic power conversion efficiencies have jumped from 3% to over 25% in ten years, and the external quantum efficiency of perovskite LEDs (PeLEDs) has increased dramatically from 0.1% to over 20% in the past seven years. Formation of perovskite nanocrystals is one of the best way of enhancing the performance of PeLEDs.

In this talk, we will present our efforts on the development of efficient and large-area PeLEDs with solution-processed nanocrystals including: 1) In-situ formation of perovskite nanocrystals with bulky organoammonium ligands, 2) Surface engineering of the perovskite nanocrystals with minimized traps, 3) Dual trap passivation of both lead and halide-induced traps for PeLEDs with EQE reaching 20.9%, 4) Design of polymerized perovskites with reduced electron-phonon coupling and non-radiative recombination rate, which leads to an EQE of 23.2%. We will then introduce our recent work on large-area fabrication of PeLEDs using blade-coating approach.

报告人简介：

肖正国，中国科学技术大学特任教授，博士生导师。2015 年8月毕业于美国内布拉斯加-林肯大学材料工程专业，获博士学位，师从光电子学领域专家Jinsong Huang教授。2015年9月到2018年2月在美国普林斯顿大学电子工程系从事博士后研究。2018年3月加入中国科学技术大学物理系。长期致力于新型光电子材料及器件的研究，包括基于有机和杂化钙钛矿材料的太阳能电池、光电探测器、LED等。2014年获国家优秀自费留学生奖；分别于2014年，2015年获得内布拉斯加大学材料系和工程学院优秀研究助理奖；2015年获美国材料学会研究生银奖。近年来在Nature Materials、Nature Photonics、Nature Communications、Advanced Materials等期刊发表论文六十多篇，总被引用超过16000次，H-index：44。