title: High quantum efficiency blue phosphorescent organic light-emitting diodes using 6-position-modified benzofuro[2,3-b]pyridine derivatives.
abstract: High quantum efficiency blue phosphorescent organic light-emitting diodes were developed using 6- position modified benzofuro[2,3-b]pyridine derivatives as host materials. Two high triplet energy host materials derived from benzofuro[2,3-b]pyridine modified with carbazole or 9-phenylcarbazole were synthesized and the device performances of the host materials were investigated. A high quantum efficiency of 24.3% was achieved using the benzofuro[2,3-b]pyridine host materials due to good charge balance and energy transfer.
authors: Department of Polymer Science and Engineering, Dankook University 126, Jukjeon-dong, Suji-gu, Yongin-si, Gyeonggi-do 448-701, Korea.
authors: Chil Won
authors: CW
authors: Lee
authors: Jung-Keun
authors: JK
authors: Kim
authors: Sung Hoon
authors: SH
authors: Joo
authors: Jun Yeob
authors: JY
authors: Lee