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Acta Phys. -Chim. Sin.  2015, Vol. 31 Issue (2): 377-383    DOI: 10.3866/PKU.WHXB201412171
PHOTOCHEMISTRY AND RADIATION CHEMISTRY     
Effect of Graphene Oxide Doped PEDOT:PSS as a Hole Injection Layer on the Luminescence Performance of Organic Light-Emitting Diodes
YANG Jun-Li1,2, WU Cong-Ling1,2, LI Yuan-Hao1,2, LI Wan-Li1,2, MIAO Yan-Qin1,2, GUO Kun-Peng1,2, LIU Hui-Hui1,2, WANG Hua1,2, WU Yong-An3
1. Key Laboratory of Interface Science and Engineering in Advanced Materials of Ministry of Education, Taiyuan University of Technology, Taiyuan 030024, P. R. China;
2. Research Center of Advanced Materials Science and Technology, Taiyuan University of Technology, Taiyuan 030024, P. R. China;
3. Shanxi Guoguang Semiconductor Lighting Engineering Co. Ltd., Taiyuan 030012, P. R. China
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Abstract  

We prepared organic light-emitting diodes (OLED) using graphene oxide (GO) doped poly(3,4- ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) as a hole injection layer (HIL). The PEDOT:PSS: GO HIL layer was prepared by mixing GO into a PEDOT:PSS aqueous solution and spin-coating onto indiumtin oxide (ITO). The luminance of the ITO/PEDOT:PSS:GO (w)/NPB/Alq3/LiF/Al devices were investigated. High luminance and luminous efficiency at a low turn-on voltage were observed when using PEDOT:PSS:GO as the HIL layer in OLEDs. This can be attributed to its enhanced hole injection ability, conductivity and transparency compared to a PEDOT:PSS HIL layer based OLED. The optimized OLED containing PEDOT:PSS:GO (0.8%, mass fraction) composite HIL layer shows a transmission value of 96.8%, maximum luminance and luminous efficiency of 17939 cd·m-2 (at 7.5 V) and 3.74 cd·A-1 (at 5.5 V), respectively. These were 46.6% and 67.6% higher, respectively, compared to the reference OLED containing a PEDOT:PSS HIL layer.



Key wordsGraphene oxide      PEDOT:PSS      Hole injection      Transparency      Conductivity      Organic light-emitting diode     
Received: 29 September 2014      Published: 17 December 2014
MSC2000:  O649  
Fund:  

The project was supported by the National Natural Science Foundation of China (61307029, 21101111), Shanxi Provincial Key Innovative Research Team in Science and Technology, China (2012041011), International Science & Technology Cooperation Program of China (2012DFR50460), and New Century Excellent Talents in University of Ministry of Education of China (NCET-13-0927).

Corresponding Authors: GUO Kun-Peng, WANG Hua     E-mail: guokunpeng@tyut.edu.cn;wanghua001@tyut.edu.cn
Cite this article:

YANG Jun-Li, WU Cong-Ling, LI Yuan-Hao, LI Wan-Li, MIAO Yan-Qin, GUO Kun-Peng, LIU Hui-Hui, WANG Hua, WU Yong-An. Effect of Graphene Oxide Doped PEDOT:PSS as a Hole Injection Layer on the Luminescence Performance of Organic Light-Emitting Diodes. Acta Phys. -Chim. Sin., 2015, 31(2): 377-383.

URL:

http://www.whxb.pku.edu.cn/10.3866/PKU.WHXB201412171     OR     http://www.whxb.pku.edu.cn/Y2015/V31/I2/377

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