상세정보
학술지
Stable Efficiency Roll-Off in Blue Phosphorescent Organic Light-Emitting Diodes by Host Layer Engineering
- 발행일
- 200912
- 출처
- Organic Electronics, v.10 no.8, pp.1529-1533
- ISSN
- 1566-1199
- 출판사
- Elsevier
- 초록
- The device characteristics of blue phosphorescent organic light-emitting diodes (PHOLEDs) with mixed host structure were investigated by changing the combination and the composition of host materials in emissive layer. The distributed recombination zone and balanced charge carrier injection within emissive layer were achieved through mixed host optimization with a hole transport-type and an electron transport-type host materials, therefore the device performances were greatly enhanced, with external quantum and power efficiencies of 21.8% and 53 lm/W. Moreover, mixed host blue PHOLEDs exhibited a extremely low stable efficiency roll-off with quantum efficiencies of 20.3% and 18.6% at a luminance of 1000 and 10,000 cd/m2. © 2009 Elsevier B.V. All rights reserved.
- KSP 제안 키워드
- Blue phosphorescent organic light-emitting diodes, Charge carrier injection, Device characteristics, Efficiency roll-off, Electron Transport, Hole transport, Organic light-emitting diodes(OLEDS), Quantum Efficiency, Recombination zone, blue PHOLEDs, emissive layer(EL)