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Improved Carrier Transfer in Red Organic Light Emitting Diodes
Doped with Rubrene |
| LIU Hong-Yu;GAO Wen-Bao;YANG Kai-Xia;LIU Shi-Yong |
| National Laboratory of Integrated Optoelectronics, Jilin
University, Changchun 130023 |
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| Cite this article: |
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LIU Hong-Yu, GAO Wen-Bao, YANG Kai-Xia et al 2002 Chin. Phys. Lett. 19 572-574 |
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Abstract A red organic light emitting diode doped with rubrene is constructed with the configuration of ITO/NPB/Alq3: rubrene: DCM/Alq3/LiF/Al. In the device, N,N'-bis-(1-naphthl)-N,N'-diphenyl-1,1'-biphenyl-4,4'-diamine (NPB) is used as the hole-transporting layer, tris(8-quinolinolato) aluminum (Alq3) as the electron-transporting layer and Alq3 doped with 5,6,11,12-tetraphenylnaphthacene (rubrene) and 4-dicyanomethylene-2-methyl-6- p-dimethyla- minostyryl)-4H-pyran (DCM) as the emitting layer. When the doping concentration of rubrene is 6% and that of DCM is 4%, red purity of the device is improved effectively. The experimental phenomena are explained as the result of the improved carrier transfer from rubrene to DCM.
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| Keywords:
78.60.Fi
73.61.Ph
72.40.Jk
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Published: 01 April 2002
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