Abstract
A new kind of rare earth (RE) complex TbY(o-MOBA)6(phen)2·2H2O was synthesized, which was used as an emitting material in electroluminescence. The material was doped into poly N-vinylcarbazole (PVK) as the emitting layer, and two kinds of devices were fabricated with the structures: 1) ITO/PVK:RE complex/LiF/Al; 2) ITO/PVK:RE complex/ BCP/AlQ/LiF/Al. The turn on voltage of device 1 is 13 V and the device has the highest brightness of 18.2 cd/m2 at 21 V. Compared with the other kind of terbium complex Tb(o-MOBA)3 phen·H2O, photoluminescence (PL) and electroluminescence (EL) mechanisms of this material were discussed. Bright green emission was obtained from the optimized multi-layer device 2, and the highest EL brightness reached 124.5 cd/m2 at the voltage of 23 V.
Original language | English (US) |
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Pages (from-to) | 20-23 |
Number of pages | 4 |
Journal | Guangdianzi Jiguang/Journal of Optoelectronics Laser |
Volume | 18 |
Issue number | 1 |
State | Published - Jan 2007 |
Externally published | Yes |
Keywords
- Electroluminescence (EL)
- Exciton
- Terbium complex
ASJC Scopus subject areas
- Electrical and Electronic Engineering