| Original Articles |
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An Organic Quantum-Well Electroluminescent Device with
Enhanced Performance |
| YANG Kai-Xia1;GAO Wen-Bao1;LIU Hong-Yu1;LI Chuan-Nan1;ZHAO Yi1,
LIU Shi-Yong1;HUANG Jing-Song2 |
| 1National Laboratory of Integrated Optoelectronics, Jilin University, Changchun 130023
2Technische Universität Dresden, Institut für Angewandte Photophysik, Mommsenstr 13, 01062 Dresden, Germany
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| Cite this article: |
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YANG Kai-Xia, GAO Wen-Bao, LIU Hong-Yu et al 2001 Chin. Phys. Lett. 18 1658-1659 |
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Abstract An organic electroluminescent (EL) device has been constructed with double quantum-well structure consisting of N,N'-bis-(1-naphthl)-N,N'-diphenyl-1,1'-biphenyl-4,4'-diamine (NPB) doped with 5,6,11,12-tetraphenylnaphtha- cene (rubrene) as a potential well and emitter, undoped NPB as a barrier potential. The maximum EL efficiency and brightness reach to 5.6cd/A and 40000cd/m2, respectively. Most meaningfully, with the increase of the drive voltage, the EL efficiency (cd/A) declines very slowly after reaching its maximum, almost independent of the drive voltage in a wide range from 5 to 13V. The characteristic may be useful in improvement of the lifetime of the device.
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| Keywords:
78.60.Fi
78.66.Qn
85.60.Jb
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Published: 01 December 2001
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