Abstract
A cyclopenta[def]fluorene based high triplet energy hole transport material was synthesized as a thermally stable hole transport material for blue phosphorescent organic light-emitting diodes. The cyclopentafluorene type hole transport material showed a high glass transition temperature of 143°C, high triplet energy of 2.81 eV and the lowest unoccupied molecular orbital of 2.10 eV for electron blocking in blue phosphorescent organic light-emitting diodes. The cyclopentafluorene type hole transport material improved the external quantum efficiency of blue phosphorescent organic light-emitting diodes.
| Original language | English |
|---|---|
| Pages (from-to) | 1044-1048 |
| Number of pages | 5 |
| Journal | Organic Electronics |
| Volume | 13 |
| Issue number | 6 |
| DOIs | |
| State | Published - Jun 2012 |
| Externally published | Yes |
Keywords
- High glass transition temperature
- High quantum efficiency
- High triplet energy
- Hole transport material