| Original Articles |
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Enhanced Brightness and Efficiency in Organic Light-Emitting Devices Using an LiF-Doped Electron-injecting Layer with Aluminium Cathode
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| LI Chuan-Nan;XIAO Bu-Wen;LIU Shi-Yong |
| Department of Electronics Engineering & National Laboratory of
Integrated Optoelectronics,Jilin University, Changchun 130023
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| Cite this article: |
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LI Chuan-Nan, XIAO Bu-Wen, LIU Shi-Yong 2001 Chin. Phys. Lett. 18 120-122 |
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Abstract Organic light-emitting devices (OLEDs) with enhanced brightness and efficiency were developed using an LiF-doped organic layer as an electron-injecting layer besides the aluminium cathode. The typical device structure is glass substrate/indium-tin-oxide/N, N'-bis (3-methyphenyl)-N, N'-diphenylbenzidize/8-tris-hydroxyquinoline aluminium (Alq3)/LiF-doped Alq3/Al. An optimized device with an LiF-doped Alq3 layer showed brightness over 15300 cd/m2, while the device without the LiF-doped Alq3 layer exhibited only 3200 cd/m2, also, the luminance efficiency of the former was 4-5 times as that of the latter. This is another way to improve the OLEDs performance, especially in applications of OLEDs with a large active area.
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| Keywords:
78.60.Fi
78.66.Qn
85.60.Jb
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Published: 01 January 2001
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