报告人:肖立新 教授(北京大学)
报告题目:Highly Efficient Blue OLED
报告时间:11月03日下午15:00
报告地点:909楼-B厅
摘要
Based on our work on deep blue OLED, very recently, we have synthesized a deep blue emitter TPEA that combines the advantages of TTF-HLCT to enhance the hexciton for high EL efficiencies and the merits of AIE to ensure low roll-off of device efficiency. The anthracene groups are twisted from the central TPE moiety, which effectively prevents bathochromic shift of emission as shown in its crystallographic structure. In addition, a D-A structure was built by using methoxy and cyano to improve the charge balance in the devices. In addition, the material possesses high thermal stability with a Tg of 155 °C. The non-doped device achieved the high performance with a Von of 2.6 V at a luminance of 1 cd m−2, a hPE, max of 11.1 lm W−1, a hCE, max of 9.9 cd A−1, and a low hCE roll-off. The doped device based on TPEA was fabricated to acquire deep blue emission with CIE coordinates of (0.15, 0.09), showing a hext, max up to 8.0% and the highest hPE, max of 7.3 lm W−1 among all the TTF and HLCT deep-blue emitters. Inspired by these preliminary results, we believe that the combination of the merits of TTF-HLCT and AIE would be a promising molecular design principle for exploring highly efficient deep blue emitters.
简介
肖立新:北京大学物理学院教授,博士生导师。2000年获日本东京大学博士学位。中国光学学会、美国材料学会、SPIE学会会员、及英国皇家化学学会会士。长期从事光电功能材料及器件方面的研究,如有机发光材料及其器件,光伏材料及其器件物理等。主持过多次国家自然科学基金,承担973项目子课题。已发表论文120余篇及申请专利共30余件,SCI他引2000余次,编著《钙钛矿太阳能电池》,译著《有机电致发光-从材料到器件》,参与编著《锂离子电池》。2015年度教育部自然科学一等奖(第一完成人,高效有机蓝光材料及其介观结构发光器件研究)。
联系人:廖良生 教授
责任编辑:杨娟