Self‐Encapsulated Cu Grid for Highly Transparent Conductive Electrode for Transparent Heater and Electrochemical Supercapacitor Applications

The conducting metallic grid is a prominent viable candidate for an alternative to indium tin oxide for optoelectronic devices. This metallic grid tends to oxidize quickly, and to avoid oxidization, a passivation layer must be added, which drastically compromises the transmittance. The fabrication of a highly flexible, highly transparent, and conductive copper grid electrode with an outstanding sheet resistance of 0.11 Ω □−1, and excellent transparency of 93.13% is reported. This copper electrode resists oxidization with the help of poly(3,4‐ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS), and even after exposing the electrode to the ambient atmosphere, it shows excellent sheet resistance of 0.12 Ω □−1. This is achieved by the in situ formation of an oxidization‐resistive light‐absorbing PEDOT:PSS layer that encapsulates the Cu microparticles during electrodeposition. The electrode shows excellent mechanical stability with good electromagnetic interference shielding of 19 dB. Moreover, the electrode is developed as a thin film heater, and subjects to electrochemical analysis, which shows a specific capacitance of 81.58 mF cm−2 for supercapacitor application.

[1]  Wan-Gyu Lee,et al.  Fabrication of junction-free Cu nanowire networks via Ru-catalyzed electroless deposition and their application to transparent conducting electrodes , 2021, Nanotechnology.

[2]  Han‐Ki Kim,et al.  High-performance flexible transparent micro-supercapacitors from nanocomposite electrodes encapsulated with solution processed MoS2 nanosheets , 2021, Science and technology of advanced materials.

[3]  Bangbang Nie,et al.  High-Performance Transparent and Conductive Films with Fully Enclosed Metal Mesh. , 2021, ACS applied materials & interfaces.

[4]  M. Walker,et al.  A Microcontact-Printed Nickel-Passivated Copper Grid Electrode for Perovskite Photovoltaics , 2021, ACS Applied Energy Materials.

[5]  R. Hatton,et al.  High-Performance Transparent Copper Grid Electrodes Fabricated by Microcontact Lithography for Organic Photovoltaics , 2021, ACS Applied Energy Materials.

[6]  S. Ko,et al.  Advances in protective layer-coating on metal nanowires with enhanced stability and their applications , 2021 .

[7]  G. Wallace,et al.  One-Pot Hydrothermal Synthesis of Solution-Processable MoS2/PEDOT:PSS Composites for High-Performance Supercapacitors. , 2021, ACS applied materials & interfaces.

[8]  Han‐Ki Kim,et al.  ITO and graphene-covered Ag grids embedded in PET substrate by thermal roll imprinting for flexible organic solar cells , 2020 .

[9]  I. Jahan,et al.  Facile microwave-mediated green synthesis of non-toxic copper nanoparticles using Citrus sinensis aqueous fruit extract and their antibacterial potentials , 2020 .

[10]  Sida Luo,et al.  Stretchable Graphene Thin Film Enabled Yarn Sensors with Tunable Piezoresistivity for Human Motion Monitoring , 2019, Scientific Reports.

[11]  Qi Chen,et al.  Efficiency above 12% for 1 cm2 Flexible Organic Solar Cells with Ag/Cu Grid Transparent Conducting Electrode , 2019, Advanced science.

[12]  Jie Lin,et al.  In Situ Surface Oxidized Copper Mesh Electrodes for High‐Performance Transparent Electrical Heating and Electromagnetic Interference Shielding , 2018, Advanced Electronic Materials.

[13]  Hui Wu,et al.  Roll‐to‐Roll Production of Transparent Silver‐Nanofiber‐Network Electrodes for Flexible Electrochromic Smart Windows , 2017, Advanced materials.

[14]  Jie Lin,et al.  High-performance hierarchical graphene/metal-mesh film for optically transparent electromagnetic interference shielding , 2017 .

[15]  Jin-Seok Park,et al.  Improvement in color properties of copper mesh electrodes via electrophoretic coating with nano-structured carbon materials , 2017 .

[16]  Wei Zhu,et al.  Enhanced electrical conductivity and reliability for flexible copper thin-film electrode by introducing aluminum buffer layer , 2017 .

[17]  A. Amann,et al.  Asymmetric Pentagonal Metal Meshes for Flexible Transparent Electrodes and Heaters. , 2016, ACS applied materials & interfaces.

[18]  G. U. Kulkarni,et al.  Visibly Transparent Heaters. , 2016, ACS applied materials & interfaces.

[19]  Hao Fu,et al.  Crackle template based metallic mesh with highly homogeneous light transmission for high-performance transparent EMI shielding , 2016, Scientific Reports.

[20]  Han‐Ki Kim,et al.  Indium-free, highly transparent, flexible Cu2O/Cu/Cu2O mesh electrodes for flexible touch screen panels , 2015, Scientific Reports.

[21]  Se-Young Jeong,et al.  Cu Mesh for Flexible Transparent Conductive Electrodes , 2015, Scientific Reports.

[22]  Seung Hwan Ko,et al.  Low‐Cost Facile Fabrication of Flexible Transparent Copper Electrodes by Nanosecond Laser Ablation , 2015, Advanced materials.

[23]  Benjamin J Wiley,et al.  Copper nanowire networks with transparent oxide shells that prevent oxidation without reducing transmittance. , 2014, ACS nano.

[24]  Z. Ren,et al.  Uniform Self‐Forming Metallic Network as a High‐Performance Transparent Conductive Electrode , 2014, Advanced materials.

[25]  S. Ko,et al.  Nonvacuum, maskless fabrication of a flexible metal grid transparent conductor by low-temperature selective laser sintering of nanoparticle ink. , 2013, ACS nano.

[26]  R. Hatton,et al.  An Indium‐Free Low Work Function Window Electrode for Organic Photovoltaics Which Improves with In‐Situ Oxidation , 2013, Advanced materials.

[27]  Eun Sung Kim,et al.  Heat Dissipation of Transparent Graphene Defoggers , 2012 .

[28]  Mikkel Jørgensen,et al.  Silver front electrode grids for ITO-free all printed polymer solar cells with embedded and raised topographies, prepared by thermal imprint, flexographic and inkjet roll-to-roll processes. , 2012, Nanoscale.

[29]  Jeongdai Jo,et al.  Design of roll-to-roll printing equipment with multiple printing methods for multi-layer printing. , 2012, The Review of scientific instruments.

[30]  N. Colaneri,et al.  EMI shielding measurements of conductive polymer blends , 1991, [1991] Conference Record. IEEE Instrumentation and Measurement Technology Conference.

[31]  Han‐Ki Kim,et al.  Impact of low temperature plasma annealing for flexible, transparent and conductive ITO/PEDOT:PSS composite electrode , 2021 .

[32]  Jin Sung Park,et al.  Cu/graphene hybrid transparent conducting electrodes for organic photovoltaic devices , 2021 .

[33]  R. Hatton,et al.  A Hybrid Copper:Tungsten Suboxide Window Electrode for Organic Photovoltaics , 2015, Advanced materials.