J. Phys. IV France
Volume 132, March 2006
Page(s) 341 - 344
Publié en ligne 11 mars 2006
10th International Conference on the Formation of Semiconductor Interfaces
C. Girardeaux, et al.
J. Phys. IV France 132 (2006) 341-344

DOI: 10.1051/jp4:2006132065

Efficiency improvement of white organic light emitting diodes with a mixed electron transporting layer

Uerng-Yih Ueng1, Ching-Huei Tseng1 and Meiso Yokoyama2

1  Department of Electrical Engineering, National Sun Yat-Sen University Kaohsiung, Taiwan, R.O.C
2  Department of Electronic Engineering, I-Shou University, Kaohsiung, Taiwan, R.O.C

In this paper, we use the Buffer layer (Alq: BCP) by co-evaporation to improve the efficiency of OLED. And we obtain some advantages: (i) The chromaticity is insensitive to the driving current within a large range. (ii) relatively high efficiency and high brightness. (iii) The structure is relatively simple, so the fabrication process offers high reproducibility. (iv) The device's chromaticity is only related to the thickness of the undoped NPB, so it is very easy to tune the color of the device emission.

© EDP Sciences 2006