Acta Phys. -Chim. Sin. ›› 2015, Vol. 31 ›› Issue (2): 377-383.doi: 10.3866/PKU.WHXB201412171

• PHOTOCHEMISTRY AND RADIATION CHEMISTRY • Previous Articles     Next Articles

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. 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
  • Received:2014-09-29 Revised:2014-12-15 Published:2015-01-26
  • Contact: GUO Kun-Peng, WANG Hua E-mail:guokunpeng@tyut.edu.cn;wanghua001@tyut.edu.cn
  • Supported by:

    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).

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 words: Graphene oxide, PEDOT:PSS, Hole injection, Transparency, Conductivity, Organic light-emitting diode

MSC2000: 

  • O649