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Journal of Materials Science

, Volume 54, Issue 19, pp 12688–12697 | Cite as

Enhanced electroluminescent performance by doping organic conjugated ionic compound into graphene oxide hole-injecting layer

  • Pan Liu
  • Junna Liu
  • Bingbing Zhang
  • Wansheng Zong
  • Shengang Xu
  • Yingliang LiuEmail author
  • Shaokui CaoEmail author
Electronic materials
  • 70 Downloads

Abstract

Organic conjugated ionic compound 10,10′-dimethyl-9,9′-biacridinum bis(monomethyl terephthalate) (MMT) is doped into graphene oxide (GO) hole-injecting layer to enhance the electroluminescent performance of organic light-emitting diodes (OLEDs). The composite films are characterized in detail by FTIR, SEM, XPS, and UPS. The XPS result indicates the evident ππ stacking interaction between the conjugated structures of GO and MMT. The UPS result shows the decrease in ionization potential of GO due to MMT-doping. As a result, at the optimal doping ratio of 4 wt%, the maximum luminous efficiency of OLEDs is increased to 15.46 cd/A, which is 3.4 times as 4.55 cd/A of the control device. Besides, the luminance is also enhanced to 19950 cd/m2, while the turn-on voltage is decreased to 2.5 V. Doping organic conjugated ionic compound into the GO hole-injecting layer is a facile and efficient approach to improve the electroluminescent performance of OLEDs.

Notes

Acknowledgements

We gratefully acknowledge the financial support from the National Natural Science Foundation of China (NSFC; Grant Nos. U1304212, 21274133, 20774088 and 21374106) and the Development Foundation for Distinguished Junior Researchers at Zhengzhou University (Grant No. 1421320043).

Supplementary material

10853_2019_3820_MOESM1_ESM.docx (20 kb)
Supplementary material 1 (DOCX 20 kb)

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© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  1. 1.School of Materials Science and EngineeringZhengzhou UniversityZhengzhouPeople’s Republic of China
  2. 2.Henan Key Laboratory of Advanced Nylon Materials and ApplicationZhengzhou UniversityZhengzhouPeople’s Republic of China

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