Improved White Organic Light-Emitting Devices with Dual-Emission-Layer Design
In this work,approaches to improve current efficiency of white organic light-emitting diodes (WOLEDs) with high color purity have been studied. The emission layer in devices consists of2-(t-butyl)-9,10-bis(2-naphthyl)anthracene (TBADN) blue host and 5,6,11,12-tetraphenylnaphthacene (rubrene) yellow dopant. The efficiency can be enhanced by using architecture of dual emission layers and hole-blocking layer. However,obvious yellow-shift emission occurs due to the small energy barrier between layers. The yellow-shift phenomenon is mitigated by modifying emission layers. The highest current efficiency of WOLED is 6.43 cd/A,which is greater by 51% than the device with single emission layer. The Commission Internationale de lEclairage (CIE) coordinates of (0.33,0.33) exhibits high color purity in WOLEDs.
Wei-Chou Hsu Ying-Nan Lai Ching-Sung Lee Su-Wei Yeh Wen-Feng Lai Wen-Hsuan Lai
Institute of Microelectronics,Department of Electrical Engineering,National Cheng Kung University,1 Department of Electronic Engineering,Feng Chia University,100 Wenhwa Road,Taichung,Taiwan 40724
国际会议
9th International Conference on Solid-State and Integrated-Circuit Technology(第9届固态和集成电路国际会议)
北京
英文
1017-1020
2008-10-20（万方平台首次上网日期，不代表论文的发表时间）