[14p-302-1~17] 12.4 Organic light-emitting devices and organic transistors

△ [14p-302-7] A Series of Dibenzofuran-containing Electron-Transporting Host Materials for Highly Efficient Deep Red OLEDs

〇Takashi Ito¹, Hisahiro Sasabe^1,2,3, Yuji Nagai², Natuki Onuma², Satoru Ohisa³, Junji kido^1,2,3,4 (1.Fac. of Engineering Yamagata Univ., 2.Dept. of Org. Mater. Sci, 3.ROEL, 4.FROM)

Keywords:OLED, deep-red, exciplex

In this work, we developed three types of dibenzofuran-containing electron-transporting host materials for highly efficient deep red phosphorescent OLEDs. For a deep red phosphorescent emitter, we used (DPQ)₂Ir(dpm). These dibenzofuran derivatives can form an exciplex with NPD, and used as host materials. An optimized OLED showed a high external quantum effciency of over 16% with a very low turn-on voltage of 2.4 V. These performances are among the best in the state-of-the-art deep red OLEDs.