상세정보
학술지
Improved Performance of Blue Phosphorescent Organic Light-Emitting Diodes with a Mixed Host System
- 발행일
- 200912
- 출처
- Applied Physics Letters, v.95 no.25, pp.253304-1-253304-3
- ISSN
- 0003-6951
- 출판사
- American Institute of Physics (AIP)
- 초록
- We have investigated a relationship between device performances and host properties in the emissive layer (EML) of iridium(III) bis(4??, 6?? -difluorophenylpyridinato)tetrakis(1-pyrazolyl)borate doped blue phosphorescent organic light-emitting diodes (PHOLEDs). We found that the recombination zone as well as charge carrier injection properties of the EML could be systematically engineered through a mixed host system. Therefore, light-emitting performances of blue PHOLEDs were greatly improved with external quantum and power efficiencies of 20.5% and 43.5 lm/W at a luminance of 56 cd/ m2, respectively. © 2009 American Institute of Physics.
- KSP 제안 키워드
- Blue phosphorescent organic light-emitting diodes, Carrier injection properties, Charge carrier injection, Host system, Organic light-emitting diodes(OLEDS), Recombination zone, blue PHOLEDs, emissive layer(EL), improved performance, light-emitting diode(LED), mixed host