상세정보
학술지
Highly Efficient All Phosphorescent White Organic Light-Emitting Diodes for Solid State Lighting Applications
- 발행일
- 201403
- 출처
- Current Applied Physics, v.14 no.Supplement 1, pp.S84-S87
- ISSN
- 1567-1739
- 출판사
- Elsevier
- 협약과제
- 13VB3800, AMOLED TV용 soluble TFT 및 화소 형성 소재/공정 기술 개발, 이종희
- 초록
- We report highly efficient all phosphorescent white organic light-emitting diodes (OLEDs) with an exciton-confinement structure. By stacking two emissive layers (EMLs) with different charge transporting properties, effective charges as well as exciton confinements were achieved. Accordingly, efficient blue OLEDs with a peak external quantum efficiency (EQE) over 22% and power efficacy (PE) over 50 lm/W were developed by using iridium(III) bis(4,6-(difluorophenyl) pyridinato-N,C2??)picolinate (FIrpic) as an electro-phosphorescent dopant. When the optimized orange and red EMLs were sandwiched between the stacked two blue EMLs, white OLEDs with an EQE and PE of 24.3% and 45.9 lm/W at a luminance of 1000 cd/m2 were obtained without the use of any out-coupling techniques. In addition, these white OLEDs exhibit a color rendering index (CRI) value of 84 with high efficacy. © 2013 Elsevier B.V. All rights reserved.
- KSP 제안 키워드
- Blue OLEDs, Charge transporting, Color rendering index, Coupling technique, Effective charges, External Quantum Efficiency, Organic light-emitting diodes(OLEDS), Phosphorescent white organic light-emitting diodes, Solid state lighting, different charge, highly efficient