| Abstract
| - Introduction of a novel starburst amorphous molecule, PCATA, as the hole injecting and transporting layer in organic light-emitting devices resulted in greatly enhanced brightness and efficiencies due to better balanced charge recombination at the emitting interface.
- We report the synthesis of a novel starburst molecule, 4,4‘,4‘ ‘-tris(N-3-methylphenyl-N-(9-ethylcarbazyl-3)amino) triphenylamine (PCATA), and its application in organic light-emitting devices (OLEDs). Theintroduction of PCATA into the standard NPB/Alq3 OLED as the hole injecting and transporting layerdramatically enhanced the device efficiency to 5.7 cd/A and 2.2 lm/W, which are a factor of 2 higherthan those of the standard OLED without the PCATA layer. The performance enhancement is attributedto a better balance of hole and electron injection in the PCATA-added OLED.
|
