Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1442668 | Synthetic Metals | 2009 | 5 Pages |
Abstract
Polymer-based blue electrophosphorescent light-emitting diodes are reported by doping iridium(III) diazine complex (DFPPM)2Ir(pic) (DFPPM = 2-(2,4-difluorophenyl)-pyrimidine, pic = picolinate) in poly(vinylcarbazole) (PVK) as the source of emission. The iridium(III) diazine complex shows sky blue emission with its maximum emission peak at 476 nm originating from an admixture of triplet metal-to-ligand charge-transfer and ligand-centered states. The (DFPPM)2Ir(pic)-doped device furnishes a maximum external quantum efficiency of 2.2% and power efficiency of 1.9 lm/W at a 10 wt% doping concentration.
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Authors
Guoping Ge, Xiaohang Yu, Haiqing Guo, Fuzhi Wang, Dechun Zou,