Transparent and Flexible Composite Films with Excellent Electromagnetic Interference Shielding and Thermal Insulating Performance

Abstract

As the working environment becomes more complex, the visualization of windows in electronic devices increasingly requires transparent and flexible electromagnetic interference (EMI) shielding films. There is a need for materials with EMI shielding properties, while maintaining excellent high light transmission and good thermal insulation. However, the preparation of such multifunctional materials remains challenging due to the respective mechanisms of action of the different properties. Herein, a multilayer structure strategy is proposed to fabricate transparent and flexible indium tin oxide (ITO)/silver nanowire (AgNW) composite films, achieving a multifunctional integration of high light transmission, strong EMI shielding, and good thermal insulation properties of the composite films. Simultaneously, the layered structure was designed and the potential optimization mechanism of the EMI shielding performance of the composite film was analyzed, providing great flexibility for the preparation of transparent composite films. The combination of excellent EMI shielding performance, outstanding near-infrared shielding performance, and high light transmittance makes the ITO/AgNW (IA) composite films promising for abundant potential applications.

Flexible Embedded Metal Meshes by Sputter-Free Crack Lithography for Transparent Electrodes and Electromagnetic Interference Shielding

“…As we become more reliant on electronic devices and systems, there is a pressing need for the development of effective electromagnetic interference (EMI) shielding materials. These shielding materials protect electronic components from radiation damage and block undesirable signals. − To address EMI shielding needs, a wide variety of materials have been studied including metal films, ,,− metal meshes, − metal nanowires, − graphene, carbon nanotubes, , and MXenes . There is also growing interest in hybrid structures, − such as conductive oxide/metal, − MXene/metal, , and metal/graphene. , …”

Petal-Shaped Graphene Porous Films with Enhanced Absorption-Dominated Electromagnetic Shielding Performance and Mechanical Properties

“…In comparison to other carbon-based electromagnetic shielding materials, graphene exhibits notable characteristics such as high conductivity, large specific surface area, and abundant surface functional groups. − Achieving high-performance electromagnetic shielding effects often necessitates the incorporation of a substantial quantity of graphene into graphene-based composites. , However, this practice gives rise to challenges encompassing mechanical degradation, cost escalation, processing complexities, and an exacerbation of electromagnetic wave reflection at the surface of materials, leading to the secondary electromagnetic pollution . Presently, the primary challenge encountered in the realm of graphene-based composites for electromagnetic shielding lies in devising strategies to attain excellent electromagnetic shielding efficiency, primarily focused on absorption, while employing lower graphene loading levels. , …”

Single‐ and Double‐Layer Embedded Metal Meshes for Flexible, Highly Transparent Electromagnetic Interference Shielding

“…These shielding materials serve to protect electronic components against the harmful effects of radiation and prevent the interference of undesired signals. [ 1–7 ] In response to the requirements for EMI shielding, extensive research has been conducted on a diverse range of materials including metal films, [ 1,3,8–12 ] metal meshes, [ 9,13–19 ] metal nanowires, [ 20–22 ] carbon nanotubes, [ 23,24 ] graphene, [ 25 ] and MXenes. [ 26 ] Hybrid structures are also garnering increasing attention, [ 27–29 ] such as conductive oxide/metal, [ 30–32 ] MXene/metal, [ 33,34 ] and metal/graphene.…”