Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 372-376 |
| Number of pages | 5 |
| Journal | Dyes and Pigments |
| Volume | 98 |
| Issue number | 3 |
| DOIs | |
| State | Published - 2013 |
| Externally published | Yes |
Keywords
- Blue device
- Carbazole triplet host
- Diphenylether linkage
- High glass transition temperature
- High quantum efficiency
- High triplet energy