title: Synthesis of a new polymeric host material for efficient organic electro-phosphorescent devices.
abstract: We have synthesized a new polymeric host material for phosphorescent dyes, which can be used in phosphorescent light-emitting layers. An alternating copolymer, composed of N-alkylcarbazole and tetramethylbenzene units was synthesized through the Suzuki coupling reaction. We fabricated electro-phosphorescent devices using the synthesized polymeric host doped with solution-processible green and red phosphorescent dyes. Light-emitting devices have an ITO/PEDOT/polymer + dopant/Balq3/Alq3/LiF/Al configuration. The device containing one of two studied green dopants (designated as green 1) in the polymeric host showed the best performance, with a maximum luminous efficiency of 29 cd/A. A thin film of this polymeric was successfully patterned by laser-induced thermal imaging (LITI), and an electro-phosphorescent device was fabricated using the patterned film. This patterned device showed performance characteristics similar to those of a spin-coated device.
authors.affiliation: Department of Applied Chemistry, Kumoh National Institute of Technology, Gumi 730-701, Korea.
authors.forename: Do-Hoon
authors.initials: DH
authors.lastname: Hwang
authors.forename: Moo-Jin
authors.initials: MJ
authors.lastname: Park
authors.forename: Jae-Hoon
authors.initials: JH
authors.lastname: Eom
authors.forename: Hong Ku
authors.initials: HK
authors.lastname: Shim
authors.forename: Seongtaek
authors.initials: S
authors.lastname: Lee
authors.forename: Nam Ghoul
authors.initials: NG
authors.lastname: Yang
authors.forename: Duan
authors.initials: D
authors.lastname: Lian
authors.forename: Min Chul
authors.initials: MC
authors.lastname: Suh
authors.forename: Byung Doo
authors.initials: BD
authors.lastname: Chin