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학술지 Improved Performance of Blue Phosphorescent Organic Light-Emitting Diodes with a Mixed Host System
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저자
이종희, 이정익, 이준엽, 추혜용
발행일
200912
출처
Applied Physics Letters, v.95 no.25, pp.253304-1-253304-3
ISSN
0003-6951
출판사
American Institute of Physics (AIP)
DOI
https://dx.doi.org/10.1063/1.3276075
협약과제
08IB3200, 고효율 백색 OLED 소자 기술 개발, 추혜용
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