A facile way to synthesize high-triplet-energy hosts for blue phosphorescent organic light-emitting diodes with high glass transition temperature and low driving voltage

作者：Wang, Ya-Kun; Deng, Ya-Li; Liu, Xiang-Yang; Yuan, Xiao-Dong; Jiang, Zuo-Quan^*; Liao, Liang-Sheng

来源：Dyes and Pigments, 2015, 122: 6-12.

DOI：10.1016/j.dyepig.2015.06.005

• OLED
• Hosts
• High triplet energy
• Bipolar
• Low driving voltage
• High glass transition temperature

Two novel bipolar host materials were designed and synthesized, by incorporating a-carboline and carbazole to spiro-acridine-fluorene skeleton. As expected, both materials exhibited high triplet energy over 2.8 eV, indicating they could act as suitable blue hosts in phosphorescent organic light-emitting diodes. By changing the appending group from carbazole to alpha-carboline, the thermal property and molecular bipolarity were improved. When they were applied as hosts for sky-blue emitter iridium(III) bis[4,6-difluorophenyl]pyridinato-N, C2' ] picolinate (FIrpic), good performance of 35.5 cd A(-1), 35.8 lm W-1 and 29.5 cd A(-1), 24.5 lm W-1 was achieved for alpha-carboline derivative and carbazole derivative, respectively.

• 出版日期2015-11
• 单位苏州大学