Abstract
A a-carboline based high triplet energy material, 9,90-(50-(carbazol-9-yl)- [1,10:30,100-terphenyl]- 3,300-diyl)di-α-carboline (2CbCzT), was designed and synthesized as the thermally stable host material for blue phosphorescent organic light-emitting diodes (PHOLEDs). The 2CbCzT host showed high glass transition temperature of 149 °C and high decomposition temperature of 518 °C at 5% weight loss. In addition, the 2CbCzT exhibited bipolar charge transport properties due to hole transport type carbazole and electron transport type α-carboline units. Blue PHOLEDs were developed using the high triplet energy 2CbCzT host material and a high quantum efficiency of 22.1% was obtained.
| Original language | English |
|---|---|
| Pages (from-to) | 2687-2691 |
| Number of pages | 5 |
| Journal | Organic Electronics |
| Volume | 14 |
| Issue number | 10 |
| DOIs | |
| State | Published - 2013 |
| Externally published | Yes |
Keywords
- Blue device
- High triplet energy
- Thermal stability
- α-Carboline
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