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논문 기본 정보
- 자료유형
- 학술대회자료
- 저자정보
- 발행연도
- 2004.1
- 수록면
- 724 - 726 (3page)
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Highly efficient blue organic light-emitting devices (OLEDs) utilizing the idea of copper phthalocyanine (CuPc)/N,N'-bis-(1-naphthyl)-N,N'-diphenyl,1,1'-biphenyl- 4,4'-diamine (NPB) composite hole transport layer (CPHTL) have been fabricated. The effect of inserting CPHTL upon the performance of blue OLEDs with 2-methyl-9,10-di(2-naphthyl)anthracene (MADN) as the blue emitter has been investigated. Compared with the luminous efficiency of the standard blue device without CPHTL (1.33 cd/A), that of the device with 40:60 CuPc/NPB CPHTL has been increased by more than twice up to 2.96 cd/A with a Commission Internationale d'Eclairage (CIE) coordinates of(x = 0.15, y = 0.10) and a power efficiency of 1.46 lm/W (20 mA/$cm^2$) at 6.39 V. The increased device efficiency is attributed to an improved balance between hole and electron currents arriving at the recombination zone.
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