关于举行德国马普高分子所李运贵博士学术报告的通知

报告题目：Photon generation and dissipation in organic light-emitting diodes

报  告 人：李运贵 博士 Group leader, department of Molecular Electronics Max-Planck Institute for Polymer Research

邀  请 人：牛泉  教授

报告时间：2021 年 4 月 8 日 （周四）16：00

会议地点：北区科技园1号楼发光国重402 会议室

报告人简介： 2012 年本科毕业于华中科技大学化学与化工学院，2015 年硕士毕业于华中科技大学武汉光 电国家实验室，2019 年博士毕业于德国德累斯顿工业大学，博士导师为 Karl Leo 和 Sebastian Reineke 教授。2019 年加入德国马普高分子所 Paul Blom 教授课题组从事博士后研究，2021 年 开始负责光物理小组。研究领域是二极管器件物理。研究兴趣包括：有机发光二极管光受限和 光提取；有机发光二极管器件老化机制；钙钛矿发光二极管；有机太阳能电池；新型半导体材 料（如热活化延迟荧光，室温磷光，COF）的超快光物理过程及其对器件的影响。

报告摘要： A numerical model is presented to simulate the fraction of photons coupled to air for devices with a broad recombination zone. We demonstrate that the total outcoupling can be calculated as the integral of the outcoupling efficiency over different positions of emitting dipoles, weighted by the sum-normalized recombination profile, as obtained from electrical modeling. Using single-layer OLEDs based on the thermally delayed activated fluorescence emitter 9,10-bis(4-(9H-carbazol-9-yl)-2,6-dimethylphenyl)-9,10-diboraanthracene (CzDBA) as a model system, we demonstrate that an outcoupling efficiency to the air mode as high as ~26% can be obtained. Our results show that single-layer devices with a broadened emission zone can achieve similar outcoupling efficiency to multilayer OLEDs with an optimized confined emission zone, establishing a route to efficient, stable, and simplified OLEDs. Such an established model can be used to achieve efficient OLEDs with long operation stability.