Transparent and high-performance electromagnetic interference shielding composite film based on single-crystal graphene/hexagonal boron nitride heterostructure

Zhen Su; Huihui Yang; Gang Wang; Yilei Zhang; Jia Zhang; Junhao Lin; Dechang Jia; Heyan Wang; Zhengang Lu; PingAn Hu

doi:10.1016/j.jcis.2023.02.115

Transparent and high-performance electromagnetic interference shielding composite film based on single-crystal graphene/hexagonal boron nitride heterostructure

J Colloid Interface Sci. 2023 Jun 15:640:610-618. doi: 10.1016/j.jcis.2023.02.115. Epub 2023 Feb 28.

Authors

Zhen Su¹, Huihui Yang², Gang Wang³, Yilei Zhang⁴, Jia Zhang⁵, Junhao Lin³, Dechang Jia⁶, Heyan Wang⁴, Zhengang Lu⁴, PingAn Hu⁷

Affiliations

¹ School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China; Key Laboratory of Micro-systems and Micro-structures, Manufacturing of Ministry of Education (MOE), Harbin Institute of Technology, Harbin 150080, China.
² School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China; Key Laboratory of Micro-systems and Micro-structures, Manufacturing of Ministry of Education (MOE), Harbin Institute of Technology, Harbin 150080, China. Electronic address: yhh@hit.edu.cn.
³ Department of Physics, Southern University of Science and Technology, Shenzhen 518055, China.
⁴ Ultra-precision Optical & Electronic Instrument Engineering Center, Harbin Institute of Technology, Harbin 150080, China.
⁵ Key Laboratory of Micro-systems and Micro-structures, Manufacturing of Ministry of Education (MOE), Harbin Institute of Technology, Harbin 150080, China.
⁶ School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China.
⁷ School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150080, China; Key Laboratory of Micro-systems and Micro-structures, Manufacturing of Ministry of Education (MOE), Harbin Institute of Technology, Harbin 150080, China. Electronic address: hupa@hit.edu.cn.

PMID: 36878078
DOI: 10.1016/j.jcis.2023.02.115

Abstract

The multiple requirements of optical transmittance, high shielding effectiveness, and long-term stability bring considerable challenge to electromagnetic interference (EMI) shielding in the fields of visualization windows, transparent optoelectronic devices, and aerospace equipment. To this end, attempts were hereby made, and based on high-quality single crystal graphene (SCG)/hexagonal boron nitride (h-BN) heterostructure, transparent EMI shielding films with weak secondary reflection, nanoscale ultra-thin thickness and long-term stability were finally realized by a composite structure. In this novel structure, SCG was adopted as the absorption layer, while sliver nanowires (Ag NWs) film acted as the reflection layer. These two layers were placed on different sides of the quartz to form a cavity, which achieved the dual coupling effect, so that the electromagnetic wave was reflected multiple times to form more absorption loss. Among the absorption dominant shielding films, the composite structure in this work demonstrated stronger shielding effectiveness of 28.76 dB with a higher light transmittance of 80.6%. In addition, under the protection of the outermost h-BN layer, the decline range of the shielding performance of the shielding film was extensively reduced after 30 days of exposure to air and maintained long-term stability. Overall, this study provides an outstanding EMI shielding material with great potential for practical applications in electronic devices protection.

Keywords: EMI shielding; Graphene; Heterostructure; Transparent; h-BN.