Promising Hybrid Graphene-Silver Nanowire Composite Electrode for Flexible Organic Light-Emitting Diodes

Huiying Li; Yunfei Liu; Anyang Su; Jintao Wang; Yu Duan

doi:10.1038/s41598-019-54424-3

Promising Hybrid Graphene-Silver Nanowire Composite Electrode for Flexible Organic Light-Emitting Diodes

Sci Rep. 2019 Nov 29;9(1):17998. doi: 10.1038/s41598-019-54424-3.

Authors

Huiying Li^{1

2}, Yunfei Liu^{3

4}, Anyang Su³, Jintao Wang⁴, Yu Duan⁴

Affiliations

¹ College of Computer Science and Technology, Symbol Computation and Knowledge Engineer of Ministry of Education, Jilin University, Changchun, 130012, China. lihuiying@jlu.edu.cn.
² College of Software, Jilin University, Changchun, 130012, China. lihuiying@jlu.edu.cn.
³ College of Software, Jilin University, Changchun, 130012, China.
⁴ State Key Laboratory of Integrated Optoelectronics, College of Electronic Science and Engineering, Jilin University, Changchun, 130012, China.

Abstract

Thanks to its high transparency, high carrier mobility, and thermal conductivity, graphene is often used as transparent conductive electrode (TCE) in optoelectronic devices. However, the low carrier concentration and high resistance caused by vacancy defects, grain boundaries, and superposed folds in typical graphene films limit its application. In this study, we propose a method to increase both the conductivity and carrier concentration in single-layer graphene (SLG) by blending it with silver nanowires (AgNWs). AgNWs provide connections between grain boundaries of graphene to improve charge-carrier transport. The AgNWs in this study can reduce the resistance of SLG from 650 Ω/◻ to 27 Ω/◻ yet still maintain a transmittance of 86.7% (at 550 nm). Flexible organic light-emitting diode, with a maximum 15000 cd m^-2 luminance was successfully fabricated using such graphene and AgNWs composite transparent electrodes.