Transparent and Flexible Electromagnetic Interference Shielding Film Using ITO Nanobranches by Internal Scattering

Abstract

A transparent and flexible film capable of shielding electromagnetic waves over a wide range of frequencies (X and K u bands, 8−18 GHz) is prepared. The electromagnetic wave shielding film is fabricated using the excellent transmittance, electrical conductivity, and thermal stability of indium tin oxide (ITO), a representative transparent conductive oxide. The inherent mechanical brittleness of oxide ceramics is overcome by adopting a nanobranched structure. In addition, mechanical stability is maintained even after repeated bending experiments (200 000 times). The produced transparent and flexible shielding film is applied to practical GHz devices (Wi-Fi and LTE devices), and signal sensitivity is confirmed to decrease. Therefore, it can be widely applied to various transparent and flexible electronic devices.

Flexible, Stretchable, and Transparent MXene Nanosheet/Thermoplastic Polyurethane Films for Multifunctional Heating and Electromagnetic Interference Shielding

“…4,5 To date, conventional transparent 3indium tin oxide cannot meet the potential applications of flexible electronics due to its intrinsic brittleness. 6,7 Thus, various transparent conductive materials as alternatives, including carbon nanotubes, 8 metallic nanowires, 9−11 metal meshes, 12,13 and graphene, 14 have been developed. Despite the encouraging advances, the search for effective transparent EMI shielding materials is still challenging to satisfy both light transmittance and high EMI shielding performance.…”

“…Transparent conductive films (TCF) play an essential role as a component in various optoelectronic devices, including smart windows, touch panels, and displays. It is also widely used in transparent heating and electromagnetic interference (EMI) shielding applications. − On the other hand, to cope with the increasingly serious EMI pollution, higher requirements for flexibility, transparency, and shielding efficiency are put forward for EMI shielding materials. , To date, conventional transparent 3indium tin oxide cannot meet the potential applications of flexible electronics due to its intrinsic brittleness. , Thus, various transparent conductive materials as alternatives, including carbon nanotubes, metallic nanowires, − metal meshes, , and graphene, have been developed. Despite the encouraging advances, the search for effective transparent EMI shielding materials is still challenging to satisfy both light transmittance and high EMI shielding performance.…”

Highly Transparent Tunable Microwave Perfect Absorption for Broadband Microwave Shielding

“…As an effective device to achieve microwave shielding, microwave absorbers (MAs), utilizing the coupling between electromagnetic waves and materials to produce Joule heat, can effectively reduce microwave transmission and reflection [19,20]. In the past decades, MAs represented by composites containing ferrite or magnetic metal particles have been widely studied due to remarkable microwave absorption [21][22][23], but they are usually opaque due to high optical reflection and/or absorption resulting from high permeability and wide optical absorption band.…”

Simulation and fabrication of electromagnetic shielding metallic mesh microstructure based on germanium substrate

“…The wide application of electromagnetic technology leads to various electromagnetic wave signals filling space, and electromagnetic interference becomes increasingly serious [1][2][3] . To solve the problem of electromagnetic interference, various electromagnetic shielding technologies came into being [4][5][6][7][8][9][10] . Until now, the optical window of military weapons and various aircraft photoelectric systems is the weakest link of electromagnetic shielding.…”