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Improvement of OLEDs’ performance with graphene doped in NPB as hole transport layer

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Abstract

The organic light emitting diodes (OLEDs) using graphene doped in N,N′-bis-(1-naphthyl)-N,N′-diphenyl-1,1′-biphenyl-4,4′-diamine (NPB) (NPB:Graphene) as hole transport layer was fabricated in this study. The structure of device was ITO/NPB:Graphene (20 wt%) (50 nm)/aluminum tris (8-hydroxyquinoline) Alq3 (80 nm)/LiF (0.5 nm)/Al (120 nm). The results of this device was compared with the standard device to study the effect of NPB:Graphene on the OLEDs’ performance, showing that the device used graphene doped in NPB as hole transport layer presents better performance under the same conditions. When the current density was 90 mA/cm2, the maximum current efficiency would achieve 3.40 cd/A, increased by 1.49 times compared with the standard device, and the maximum luminance of this device would achieve 10,070 cd/m2 at 15 V, increased by 5.16 times than the maximum luminance of standard device.

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Acknowledgments

This work is supported by the National Natural Science Foundation of China (Grant Nos. 61177019, 61305082, 61405071), the science and technology development program of Jilin province (Grant No. 20140101206JC), the “Thirteenth five-year” science and technology research project of Jilin province department of Education (Grant No. 2015225) and Program for the development of Science and Technology of Si Ping City (Grant No. 2015055).

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Authors and Affiliations

  1. Key Laboratory on Functional Materials Physics and Chemistry of Ministry of Education of China, College of Information Technology, Jilin Normal University, Siping, 136000, China

    Yong-hui Gao, Zhi-jie Kang, Qian Tang, Gang Zhang, Jin Wang, Wen-long Jiang & Bin Su

  2. State Laboratory of High Power Semiconductor Laser, Changchun University of Science and Technology, Changchun, 130022, China

    Yong-hui Gao & Bao-xue Bo

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  1. Yong-hui Gao
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  2. Zhi-jie Kang
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  7. Wen-long Jiang
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Correspondence to Wen-long Jiang.

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Gao, Yh., Kang, Zj., Tang, Q. et al. Improvement of OLEDs’ performance with graphene doped in NPB as hole transport layer. J Mater Sci: Mater Electron 27, 5676–5679 (2016). https://doi.org/10.1007/s10854-016-4477-6

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  • DOI: https://doi.org/10.1007/s10854-016-4477-6

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