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Vol. 25 No. 6 (2013): Vol 25 Issue 6

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Organic Function Layer Interface Behaviour on Phosphorescent Material Device Performance

https://doi.org/10.14233/ajchem.2013.13640
Zhixiang Gao
Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, 79 Yingze Street, Taiyuan 030024, Shanxi Province, P.R. China ; School of Physical Science and Electronics, Shanxi Datong University, Datong 037009, P.R. China ; Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024, P.R. China
Yuying Hao
Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, 79 Yingze Street, Taiyuan 030024, Shanxi Province, P.R. China ; Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024, P.R. China ; Department of Physics and Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, P.R. China
Hua Wang
Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, 79 Yingze Street, Taiyuan 030024, Shanxi Province, P.R. China ; Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024, P.R. China
Yanqin Miao
Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, 79 Yingze Street, Taiyuan 030024, Shanxi Province, P.R. China ; Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024, P.R. China
Bingshe Xu
Key Laboratory of Interface Science and Engineering in Advanced Materials, Ministry of Education, Taiyuan University of Technology, 79 Yingze Street, Taiyuan 030024, Shanxi Province, P.R. China ; Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024, P.R. China

Corresponding Author(s) : Yuying Hao

haoyuying@163.com

Asian Journal of Chemistry, Vol. 25 No. 6 (2013): Vol 25 Issue 6

Abstract

The interface charges influences on device performances which is captured in organic electroluminescent device (OLED) have become the hotspot of research in organic electroluminescent device, current conduction as well as the carrier and the electric field distribution is very crucial to the understanding of organic light emitting devices, (OLED) microscopic physical processes. This paper prepared a concave and convex interface structure of ITO/NPB/CBP + Ir(ppy)3/liF/Al organic electrophosphorescent devices, with 4,4'-N,N'-two carbazole biphenyl (CBP) as the host material, Ir[ppy)3(tris(2-phenyl pyridine)iridium] as phosphorescent dopant, NPB as a hole transport layer. The different concave and convex emitting layer phosphorescent device of NPB/CBP + Ir(ppy)3 interface is studied and use the current density-voltage-brightness curve and current efficiency-voltage curve analysis device interface charge trapping and injected charge dynamics, determine the optimal convex number of light emitting layer, when the convex number is 3, the maximum current efficiency of this device is 23 cd/A and was 30 % higher than traditional structure device.

Keywords

Organic light emitting devices Interface Phosphorescent Luminous efficiency
Gao, Z., Hao, Y., Wang, H., Miao, Y., & Xu, B. (2013). Organic Function Layer Interface Behaviour on Phosphorescent Material Device Performance. Asian Journal of Chemistry, 25(6), 3297–3300. https://doi.org/10.14233/ajchem.2013.13640
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