1. Synthesis and Application of Bipolar Opto-electronic Materials. Synthesis and Application of Thermal Cross-linkable Hole-transporting Materials
Date Issued
2009
Date
2009
Author(s)
Chen, You-Ming
Abstract
1. Synthesis and Application of Bipolar Opto-electronic Materialse have developed two novel electron-transporting type host materials (NpBI, DBTBI), carbazole/benzimidazole hybrid bipolar host materials (CbzCBI, CbzNBI, mCPCBI, mCPNBI) and indolocarbazole/benzimidazole hybrid bipolar host materials (TICCBI, TICNBI). All these materials have good thermal stabilities and high triplet energy level. Among these materials, DBTBI is a good host for a double-emitting layer green PHOLED which has high EQE (16.5%) and power efficiency (45.8 lm/W). CbzCBI and mCPCBI are good hosts for typical three-layer green PHOLED (20.7 % EQE, 67 lm/W). Otherwise, the blue PHOLED devices exhibit high EQE (16.3%) and power efficiency (29.8 lm/W) when using CbzNBI and mCPNBI as the host materials.. Synthesis and Application of Thermal Cross-linkable Hole-transporting Materialse have demonstrated the significant advantages of using the hole-transporting material, TFVE molecules to improve the preparation of the PLEDs. We have also measured the hole mobility of the cross-linked materials. One must be noticed is that the performance of the thermal cross-linked devices are comparable with the vacuum-deposited alpha-NPD device. The new crosslinkable HTM TICOC6VB that incorporate the indolocarbazole core has been synthesized. The thermal-crosslinked TICOC6VB/HILVB is a good candidate for hole-transporting layer.
Subjects
OLED
bipolar
Opto-electronic materials
Type
thesis
File(s)![Thumbnail Image]()
Loading...
Name
ntu-98-D94223002-1.pdf
Size
23.32 KB
Format
Adobe PDF
Checksum
(MD5):ec835488cc218905dcc8a472aa7cadfa