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A New Kind of Buffer Layer of TiO2 Self-Assembled Material in Organic Electroluminescent Devices |
BAI Feng1;DENG Zhen-Bo1;ZHANG Meng-Xin1;ZOU Wei-Yan2;CAI Qiang2 |
1Institute of Optoelectronics Technology, Northern Jiaotong University, Beijing 100044
2Department of Material, Tsinghua University, Beijing 100084 |
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Cite this article: |
BAI Feng, DENG Zhen-Bo, ZHANG Meng-Xin et al 2003 Chin. Phys. Lett. 20 420-422 |
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Abstract A new kind of TiO2 self-assembled nanometer material has been fabricated and is used as a hole-injecting buffer layer in organic electroluminescent devices. The luminance and the efficiency of a device individually rises from 1500 cd/m2 to 5000 cd/m2 and from 2.0 cd/A to 3.92 cd/A at the current density of 100 mA/cm2. The enhancements in brightness and efficiency are attributed to an improved balance of hole and electron injections due to blocking of the injected holes by the buffer layer and a more homogeneous adhesion of the hole transporting layer to the anode.
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Keywords:
78.60.Fi
85.60.Jb
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Published: 01 March 2003
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