title: Phosphorescence white organic light-emitting diodes with single emitting layer based on isoquinolinefluorene-carbazole containing host.
abstract: We have demonstrated a stable phosphorescent white organic light-emitting diodes (WOLEDs) using an orange emitter, Bis(5-benzoyl-2-(4-fluorophenyl)pyridinato-C,N) iridium(III)acetylacetonate [(Bz4Fppy)2Ir(III)acac] doped into a newly synthesized blue host material, 2-(carbazol-9-yl)-7-(isoquinolin-1-yl)-9,9-diethylfluorene (CzFliq). When 1 wt.% (Bz4Fppy)2Ir(III)acac was doped into emitting layer, it was realized an improved EL performance and a pure white color in the OLED. The optimum WOLED showed maximum values as a luminous efficiency of 10.14 cd/A, a power efficiency of 10.24 Im/W, a peak external quantum efficiency 4.07%, and Commission Internationale de L'Eclairage coordinates of (0.34, 0.39) at 8 V.
authors.affiliation: Department of Information Display, Hongik University, Seoul 121-791, Korea.
authors.forename: Ja Ryong
authors.initials: JR
authors.lastname: Koo
authors.forename: Seok Jae
authors.initials: SJ
authors.lastname: Lee
authors.forename: Gun Woo
authors.initials: GW
authors.lastname: Hyung
authors.forename: Bo Young
authors.initials: BY
authors.lastname: Kim
authors.forename: Hyun Su
authors.initials: HS
authors.lastname: Shin
authors.forename: Kum Hee
authors.initials: KH
authors.lastname: Lee
authors.forename: Seung Soo
authors.initials: SS
authors.lastname: Yoon
authors.forename: Woo Young
authors.initials: WY
authors.lastname: Kim
authors.forename: Young Kwan
authors.initials: YK
authors.lastname: Kim