상세정보
학술지
Dependence of Light-Emitting Characteristics of Blue Phosphorescent Organic Light-Emitting Diodes on Electron Injection and Transport Materials
- 발행일
- 201210
- 출처
- ETRI Journal, v.34 no.5, pp.690-695
- ISSN
- 1225-6463
- 출판사
- 한국전자통신연구원 (ETRI)
- 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.
- 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, high external quantum efficiency