title: [Study on the movement of the carrier recombination region in organic light-emitting diodes (OLEDs) based on DPVBi/Alq3].
abstract: Series of organic light emitting devices with basic structure of ITO/PCBM: PVK(x Wt%, approximately 40 nm)/DPVBi(30 nm)/Alq3 (30 nm)/Al were fabricated in order to investigate the carrier recombination region movement in these devices. The carrier injection-dependent, the carrier transport-dependent and the voltage-dependent carrier recombination region movements were investigated respectively by modifying cathode with lithium fluoride, by changing the doping concentration of PCBM and by changing the voltage on the devices. The physical mechanism behind the voltage-dependent carrier recombination region movement was discussed.
authors.affiliation: Key Laboratory of Luminescence and Optical Information, Ministry of Education and Institute of Optoelectronics Technology, Beijing Jiaotong University, Beijing 100044, China. 07118346@bjtu.edu.cn
authors.forename: Guang
authors.initials: G
authors.lastname: Yan
authors.forename: Su-ling
authors.initials: SL
authors.lastname: Zhao
authors.forename: Zheng
authors.initials: Z
authors.lastname: Xu
authors.forename: Fu-jun
authors.initials: FJ
authors.lastname: Zhang
authors.forename: Chao
authors.initials: C
authors.lastname: Kong
authors.forename: Xiao-dong
authors.initials: XD
authors.lastname: Liu
authors.forename: Wei
authors.initials: W
authors.lastname: Gong
authors.forename: Li-yan
authors.initials: LY
authors.lastname: Gao