Multi-layer organic light-emitting diodes processed from solution using phosphorescent dendrimers in a polymer host

TitleMulti-layer organic light-emitting diodes processed from solution using phosphorescent dendrimers in a polymer host
Publication TypeJournal Article
Year of Publication2010
AuthorsKo, Li-Chun, Liu Tsung-Yu, Chen Chun-Yao, Yeh Chung-Ling, Tseng Shin-Rong, Chao Yu-Chiang, Meng Hsin-Fei, Lo S. C., Burn P. L., and Horng Sheng-Fu
JournalOrganic Electronics
Volume11
Pagination1005-1009
Date Published03/2010
KeywordsDendrimer
Abstract

A uniform dispersion of highly soluble phosphorescent dendrimer emitters is achieved by blending with a polymer host poly(9-vinylcarbazole) (PVK) containing N,N'-diphenyl-N,N'-(bis(3-methylphenyl)-[1,1-biphenyl]-4,4'-diamine (TPD) and 2-(4-biphen-4'-yl)-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (PBD). No visible aggregation or self-quenching was observed for guest-to-host weight ratios of up to 33:67. The dendrimers contain a fac-tris(2-phenylpyridyl)iridium(III) [Ir(ppy)3] core, first generation biphenyl-based dendrons, and 2-ethylhexyloxy surface groups. The guest-host blend is used for all solution processed organic light-emitting diodes. A maximum external and current efficiency of 10.2% and 38

URLhttp://www.sciencedirect.com/science/article/B6W6J-4YN5PHS-4/2/5629b29dd692c62543c0c53b2ab3cba8
DOIDOI: 10.1016/j.orgel.2010.03.014