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High Brightness and Efficiency Yellow-Emitting Organic Electroluminescent Device |
HUANG Jing-song;XIE Zhi-yuan;YANG Kai-xia;LI Chuan-nan,HOU Jing-ying;LIU Shi-yong |
National Laboratory of Integrated Optoelectronics, Jilin University, Changchun 130023 |
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Cite this article: |
HUANG Jing-song, XIE Zhi-yuan, YANG Kai-xia et al 1999 Chin. Phys. Lett. 16 226-228 |
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Abstract Yellow-light-emitting organic electroluminescent device with multilayer thin-film structure, which shows high brightness and efficiency, is constructed. The hole-transport layer is an N,N'-bis(3-methyphenyl)-N,N'-diphenylbe-nzidine film. The electron-transport layer is an 8-(quinolinolate)-aluminum(A1q) film. The luminescent layer consists of a host material Alq and an emitting dopant 5,6,11,12-petraphenyInaphthacene. The doped device exhibited the maximum emission 40000cd/m2 at 19V, and the maximum efficiency of 3.141m/W, which have been improved by about six and three times, respectively, in comparison with that in undoped device. For the unpackaged device, a luminance half-life on the order of about 230 h has been achieved with a constant current density of 15mA/cm2, starting at 500cd/m2 at the room temperature under ambient atmosphere.
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Keywords:
85.60.Jb
78.60.Fi
85.60.-q
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Published: 01 March 1999
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