The Spacer Thickness Effects on the Electroluminescent Characteristics of Hybrid White Organic Light-emitting DiodesThe Spacer Thickness Effects on the Electroluminescent Characteristics of Hybrid White Organic Light-emitting Diodes
- Other Titles
- The Spacer Thickness Effects on the Electroluminescent Characteristics of Hybrid White Organic Light-emitting Diodes
- Authors
- 서지훈; 박정선; 서보민; 김영관; 이금희; 윤승수
- Issue Date
- 2009
- Publisher
- 한국전기전자재료학회
- Keywords
- Hybrid white organic light-emitting diodes; Thickness of CBP spacer
- Citation
- Transactions on Electrical and Electronic Materials, v.10, no.6, pp.208 - 211
- Journal Title
- Transactions on Electrical and Electronic Materials
- Volume
- 10
- Number
- 6
- Start Page
- 208
- End Page
- 211
- URI
- https://scholarworks.bwise.kr/hongik/handle/2020.sw.hongik/22042
- ISSN
- 1229-7607
- Abstract
- The authors have demonstrated the various characteristics of hybrid white organic light-emitting diodes (HWOLED) using fluorescent blue and phosphorescent red emitters. We also demonstrated that two devices showed different characteristics in accordance with thickness of the 4,4′-N,N′-dicarbazole-biphenyl (CBP) spacer (CS) inserted between the blue and the red emitting layer. It was found that the device with a CS thickness of 70 Å showed a current efficiency 2.5 times higher than that of the control device with a CS thickness of 30 Å by preventing the triplet Dexter energy transfer from the red to the blue emitting layer. The HWOLED with the CS thickness of 70 Å exhibited a maximum luminance of 24500 cd/m2, a maximum current efficiency of 42.9 cd/A, a power efficiency of 37.5 lm/W, and Commission Internationale de I'Eclairage coordinates of (0.37, 0.42).
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