| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 176440 | Dyes and Pigments | 2013 | 5 Pages |
•High quantum efficiency of 23.5% in blue phosphorescent organic light-emitting diodes.•High triplet energy of 2.73 eV and high glass transition temperature of 111 °C.•Carbazole type high triplet energy host material with a diphenylether linkage.
A carbazole type, thermally stable, high triplet energy host material having a diphenylether linkage, 9,9′-(oxybis([1,1′-biphenyl]-4′,3-diyl))bis(9H-carbazole), was synthesized and the device performances of blue phosphorescent organic light-emitting diodes were studied. The new host material exhibited a high glass transition temperature of 111 °C and a high triplet energy of 2.73 eV for energy transfer to blue triplet emitter. Blue devices were fabricated using the new host material and a high quantum efficiency of 23.5% was achieved.
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