Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
176039 | Dyes and Pigments | 2014 | 5 Pages |
Abstract
•Carbazole and pyridine modified high triplet energy host material.•High triplet energy through ortho-modification of phenyl moiety.•High quantum efficiency in blue phosphorescent organic light-emitting diodes.
A new biphenyl substituted with a carbazole unit and a pyridine unit, 9-(2′-(pyridin-3-yl)-[1,1′-biphenyl]-3-yl)-9H-carbazole, was synthesized as the host material for blue phosphorescent organic light-emitting diodes. A high triplet energy of 2.96 eV was obtained by inclusion of pyridine at ortho-position of biphenyl moietry. The new biphenyl was applied as the host material for blue phosphorescent organic light-emitting diodes and a high quantum efficiency of 18.4% was achieved.
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Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Chil Won Lee, Jun Yeob Lee,