Efficient Green Organic Light-Emitting Devices Based on a Solution-Processable Starburst Molecule

• 来源期刊: 中国物理快报（英文版）
• 年，卷（期）: 2013,（9）
• 页码范围: 181-184
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/0256-307X/30/9/098501

摘要

We develop high effciency solution-processed pure green organic light-emitting devices using a starburst molecule 7,7',7"-(5,5,10,10,15,15-hexahexyl-10,15-dihydro-5H-diindeno[1,2-a:1 ',2'-c]fluorene-2,7,12-triyl) tris (4-(4-(9H-carbazol-9-yl)phenyl)benzo[c][1,2,5]thiadiazole) (TRcz) doped 2-methyl-9,10-di(2-naphthyl)anthracene (MADN) as the emitting layers.The electroluminescence properties of the devices with different doping concentrations are investigated.With the increasing doping concentration from 0.5wt％ to 5wt％,the maximum efficiency changes from 4.8 cd/A to 8.4 cd/A.Under the optimal concentration of 4wt％,the device shows pure green emission at 516nm with a chromaticity coordinate of (0.30,0.59) as well as a high brightness of 19900cd/m2 and a high effciency of 10.1 cd/A,which are better than 11490cd/m2 and 4.2cd/A obtained in the undoped device.