High-performance hierarchical graphene/metal-mesh film for optically transparent electromagnetic interference shielding

Han, Yuhui; Liu, Yuxuan; Lin, Han; Lin, Jie; Jin, Peng

doi:10.1016/j.carbon.2016.12.092

Cited by 145 publications

(86 citation statements)

References 55 publications

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“…Graphene can afford effective protection to metals from chemical or mechanical damages, and contribute to the shielding effectiveness (SE) of EMI shielding device by coating monolayer graphene on transparent metal‐meshes . The hierarchical graphene/metal‐mesh film has a sheet resistance of 45.0 Ω sq −1 with average transmittance of 90.5% in the vis–NIR region.…”

Section: Graphene‐based Hybrid Materialsmentioning

confidence: 99%

Graphene‐Based Transparent Conductive Films: Material Systems, Preparation and Applications

2018

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The rising demands of optoelectronic devices, such as flexibility, stretchability, and energy efficiency, urgently require alternative transparent conductive films (TCFs) for indium tin oxide. Among all the candidates such as carbon nanomaterials, metal nanomaterials, conductive polymers, and other nanocomposites, graphene is highly promising because of its distinct properties, such as outstanding conductivity, impressive optical transparency, remarkable mechanical flexibility, and chemical/thermal stability. However, the practical application of graphene‐based TCFs (G‐TCFs) is still challenging due to the difficulty for preparing large‐area crystalline graphene with few defects for TCFs. Many efforts have been made to solve these problems, and several kinds of optoelectronic devices have been successfully fabricated with G‐TCFs. This review presents the recent development in this area made by the authors and others, including the material systems and synthetic strategies of G‐TCFs, as well as their applications as transparent electrodes in optoelectronic devices such as field effect transistors, organic light‐emitting diodes, organic solar cells, and other devices. The current major challenges in this area and the potential practical solutions are identified.

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Section: Graphene‐based Hybrid Materialsmentioning

confidence: 99%

Graphene‐Based Transparent Conductive Films: Material Systems, Preparation and Applications

2018

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“…Considerable efforts have been made to explore flexible TEs in recent decades. Emerging candidates include conducting polymers, carbon nanotubes, graphene, metal networks, and hybrids of such materials . Among these, metal networks are widely accepted to be the most promising candidate materials in terms of their high electrical conductivity and mechanical flexibility.…”

Section: Introductionmentioning

confidence: 99%

Facile Fabrication of Ultraflexible Transparent Electrodes Using Embedded Copper Networks for Wearable Pressure Sensors

Zhao

et al. 2020

Adv Materials Technologies

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Considerable efforts have been made to explore flexible TEs in recent decades. Emerging candidates include conducting polymers, [6] carbon nanotubes, [7] graphene, [8] metal networks, [9][10][11][12] and hybrids of such materials. [13][14][15] Among these, metal networks are widely accepted to be the most promising candidate materials in terms of their high electrical conductivity and mechanical flexibility. Metal networks can be prepared by depositing metals on sacrificial network templates, such as crack networks [9,13] and electrospun fiber meshes. [16,17] Physical vapor deposition methods, including evaporation and sputtering, are most widely used to deposit metals onto these templates. [18][19][20][21] For example, Kulkarni's group has demonstrated a high-performance flexible capacitive touch panel made of thermalevaporated Cu networks. [21] Recently, solution-grown metal network TEs have drawn attention owing to their low cost and scalability. [12,[22][23][24][25][26][27][28] Despite that the crack network templates have the advantages of easy preparation and absence of junctions, there are currently a few simple solution-based processing approaches for fabricating metallic cracking network TEs with low sheet resistance and high visible transparency. The main difficulty lies in the fact that the crack templates are usually water soluble and easily peel off from the supporting substrates, which damaged the crack template and consequently considerably reduced the transmittance since the plating precursor solution tends to dissolve away or permeate the template. On the other hand, a few efforts have devoted to studying the variation of electrical properties of metal networks fabricated by crack template under large mechanical deformation.Here, we have developed a practical strategy for fabricating solution-processed Cu crack network TEs by oxygen plasma treatment-assisted crack template and electroplating (Scheme 1). The critical step that distinguishes this process from normal electroplating deposition is the surface modification of the conducting ITO glass by a simple and broadly applicable oxygen plasma treatment. The crack network templates and Cu wires formed without this treatment exhibited nonuniform and broaden morphologies. In contrast, this treatment resulted in narrow crack templates with good adhesion to the ITO glass, Pressure sensors are in urgent need due to the explosive demands in electronic skins. However, current resistive-type pressure sensors require electrode materials with complex multilevel microstructures or low opacity. Herein, a Cu network transparent electrode (TE) embedded in the polydimethylsiloxane (PDMS) substrate is designed to realize wearable pressure sensor. The Cu network is fabricated by oxygen plasma treatmentassisted crack template and electroplating. The oxygen plasma treatment improves the surface adhesion force of the substrate, which suppresses uneven template cracking and prevents the electroplating solution from seeping under the templates, thereby resulting in 20 ...

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“…[1][2][3] Indium tin oxide (ITO) is currently the most widely used TCE because of its high transparency and low resistance. [1][2][3] Indium tin oxide (ITO) is currently the most widely used TCE because of its high transparency and low resistance.…”

Section: Introductionmentioning

confidence: 99%

“…[3,16] The coating with Ni was reported to prevent the oxidation of the Cu mesh and nanowire, but it also reduced their transmittance. [3,16] The coating with Ni was reported to prevent the oxidation of the Cu mesh and nanowire, but it also reduced their transmittance.…”

Section: Introductionmentioning

confidence: 99%

In Situ Surface Oxidized Copper Mesh Electrodes for High‐Performance Transparent Electrical Heating and Electromagnetic Interference Shielding

Han

Zhong

Liu

et al. 2018

Adv Elect Materials

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Metallic mesh is a significant candidate of transparent conductive electrodes (TCEs) to substitute the current state‐of‐the‐art material indium tin oxide for optoelectronic devices. However, there remains a challenge to fabricate stable and good‐visibility metallic mesh with the low‐cost copper (Cu) material. A metallic Cu mesh electrode (on glass) with a high absolute transmittance of ≈82% combined with an adjustable low electrical resistance of ≈0.2 Ω sq−1 and a low total light reflectance of 8.7% is demonstrated here. The Cu mesh TCE shows excellent visibility and good thermal, moisture, and environmental stability that can be used in practical applications. This was achieved by in situ forming an oxidation‐resistive and light‐absorptive capping layer of oxide on the surface of Cu meshes. The electrode was fabricated by UV‐lithography and electroplating, and then directly annealing in the air. To assess the application potentials, transparent electrical heating up to 100 °C under 3 V supply and transparent shielding of radiofrequency with ≈24 dB attenuation in Ku band are achieved. Good photoelectric properties, low‐cost material, and excellent stability imply that this Cu mesh electrode is a striking candidate for low‐cost TCE for efficient optoelectronic devices.

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High-performance hierarchical graphene/metal-mesh film for optically transparent electromagnetic interference shielding

Cited by 145 publications

References 55 publications

Graphene‐Based Transparent Conductive Films: Material Systems, Preparation and Applications

Graphene‐Based Transparent Conductive Films: Material Systems, Preparation and Applications

Facile Fabrication of Ultraflexible Transparent Electrodes Using Embedded Copper Networks for Wearable Pressure Sensors

In Situ Surface Oxidized Copper Mesh Electrodes for High‐Performance Transparent Electrical Heating and Electromagnetic Interference Shielding

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