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학술지 Dependence of Light-Emitting Characteristics of Blue Phosphorescent Organic Light-Emitting Diodes on Electron Injection and Transport Materials
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저자
이정익, 이종희, 이주원, 조두희, 신진욱, 한준한, 추혜용
발행일
201210
출처
ETRI Journal, v.34 no.5, pp.690-695
ISSN
1225-6463
출판사
한국전자통신연구원 (ETRI)
DOI
https://dx.doi.org/10.4218/etrij.12.0112.0014
협약과제
11VB1700, 에너지 절감을 위한 연색지수 90이상의 고연색 OLED 조명용 유기소재 핵심원천 기술개발, 이정익
초록
We investigate the light-emitting performances of blue phosphorescent organic light-emitting diodes (PHOLEDs) with three different electron injection and transport materials, that is, bathocuproine(2,9-dimethyl-4,7-diphenyl-1,10- phenanthroline) (Bphen), 1,3,5-tri(m-pyrid-3-yl-phenyl)benzene (Tm3PyPB), and 2,6-bis(3-(carbazol-9-yl)phenyl)pyridine (26DCzPPy), which are partially doped with cesium metal. We find that the device characteristics are very dependent on the nature of the introduced electron injection layer (EIL) and electron transporting layer (ETL). When the appropriate EIL and ETL are combined, the peak external quantum efficiency and peak power efficiency improve up to 20.7% and 45.6 lm/W, respectively. Moreover, this blue PHOLED even maintains high external quantum efficiency of 19.6% and 16.9% at a luminance of 1,000 cd/m2 and 10,000 cd/m 2, respectively. © 2012 ETRI.
키워드
Blue, Cesium, Doping, Electron transporting material, Organic light-emitting diodes (OLED), Phosphorescent
KSP 제안 키워드
10-phenanthroline(BCP), 7-diphenyl-1, 9-dimethyl-4, Blue phosphorescent organic light-emitting diodes, Device characteristics, Organic light-emitting diodes(OLEDS), Peak power efficiency, blue PHOLEDs, electron injection layer, electron transporting layer, electron transporting material