title: Effect of the charge balance on high-efficiency blue-phosphorescent organic light-emitting diodes.
abstract: The charge balance in blue-phosphorescent devices was studied using single-carrier devices, and the results show that the transport is highly hole dominant. The effect of the charge balance on the device performance was further demonstrated using different electron-transport materials with different electron mobilities. By optimization of the charge balance, a maximum current efficiency of 60 Cd A(-1) at a luminance of 500 cd m(-2) was achieved.
authors.forename: Neetu
authors.initials: N
authors.lastname: Chopra
authors.forename: Jaewon
authors.initials: J
authors.lastname: Lee
authors.forename: Ying
authors.initials: Y
authors.lastname: Zheng
authors.forename: Sang-Hyun
authors.initials: SH
authors.lastname: Eom
authors.forename: Jiangeng
authors.initials: J
authors.lastname: Xue
authors.forename: Franky
authors.initials: F
authors.lastname: So