In this paper, we developed a series of novel arylamino-containing spiro triplet state host materials for green and blue phosphorescent emitters. With high enough energy gap and compatible HOMO, LUMO levels, we demonstrated the green PHOLED with a low driving voltage of 2.5 V and a high power efficiency of 38.5 lm/W. We also demonstrated blue PHOLED with a very low driving voltage of 3.0 V and a current efficiency of 9.2 cd/A.
© 2009 IEEE
Chi-Jen Lin, Heh-Lung Huang, Mei-Rurng Tseng, and Chien-Hong Cheng, "High Energy Gap OLED Host Materials for Green and Blue PHOLED Materials," J. Display Technol. 5, 236-240 (2009)