High-performance visible-infrared broadband transparent copper mesh conductor and applications for electromagnetic shielding and heating  

基于铜网栅的高性能可见-红外宽波段透明导电材料及在透明电磁屏蔽与加热领域的应用

作　　者：Tengfei Li Xiaolian Chen Zhaohua Xu Shuhong Nie Wenya Xu Wei Yuan Su Xu Shuo Zhang Fangfang Pei Wenming Su Zheng Cui 李腾飞;陈小连;徐兆华;聂书红;徐文亚;袁伟;徐速;张硕;裴芳芳;苏文明;崔铮(School of Nano-Tech and Nano-Bionics,University of Science and Technology of China,Hefei 230026,China;Printable Electronics Research Center,Nano-Devices and Materials Division,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou 215123,China;State Key Laboratory of Integrated Optoelectronics,College of Electronic Science and Engineering,Jilin University,Changchun 130012,China)

机构地区：[1]School of Nano-Tech and Nano-Bionics,University of Science and Technology of China,Hefei 230026,China [2]Printable Electronics Research Center,Nano-Devices and Materials Division,Suzhou Institute of Nano-Tech and Nano-Bionics,Chinese Academy of Sciences,Suzhou 215123,China [3]State Key Laboratory of Integrated Optoelectronics,College of Electronic Science and Engineering,Jilin University,Changchun 130012,China

出　　处：《Science China Materials》2025年第2期421-431,共11页中国科学(材料科学)(英文版)

基　　金：supported by the National Program on Key Research Project (2022YFB3603900);National Natural Science Foundation of China (52103294);National Key R&D Program of China (2017YFE0112000);China Postdoctoral Science Foundation (2019M661968);Natural Science Foundation of Jiangsu Province (BK20200258)。

摘　　要：Transparent conductors(TCs)have widespread applications in the fields of modern photodetectors and smart windows.While TCs for visible wavelengths have seen significant advancements,the development of visible-infrared(vis-IR)broadband TCs for infrared is still a daunting challenge due to the trade-off between infrared transparency and conductivity.Here,we present a vis-IR TC fabricated by using a damage-free indirect transfer method.This method involves polymer-mediated bonding of a high-resolution,standalone copper(Cu)mesh onto infrared or visible substrates via a transfer film.The obtained Cu mesh TC exhibits excellent conductivity with a sheet resistance as low as 0.06Ω/□,as well as 81%transmittance at a visible wavelength of 550 nm and 65%transmittance at an IR wavelength of 10μm.Furthermore,a specially developed bonding strategy ensures the longterm reliability of the Cu mesh TC in harsh environments.The Cu mesh TC can be applied in both heating and electromagnetic(EM)shielding.As a transparent heater,it reaches approximately 100℃ at an applied voltage of 1.2 V within 100 s.For EM shielding,a demonstration using a stainlesssteel box with a transparent observation window which is integrated with the Cu mesh shows that while the window allows both optical and IR observations,the 4G signals(8.2 GHz)of a smartphone inside the box are effectively blocked.目前,用于光电器件和智能窗的可见光透明导电材料已经取得了快速发展.然而,在红外波段,由于透光率和导电性之间的相互制约,可见-红外宽波段透明导电材料的发展受到了限制.为此,本研究提出了一种无损伤的间接转移技术,将剥离后的独立铜网栅通过聚合物键合技术转移至可见-红外光谱衬底表面,成功制备出高性能的可见-红外透明铜网栅导电材料.该材料在550 nm时透光率可达81%,在10μm时透光率为65%,同时方阻低至0.06Ω/,有效解决了可见-红外波段中高透光率与高导电性难以兼得的难题.此外,所开发的键合策略赋予该材料优异的附着力和环境可靠性.凭借其出色的性能,铜网栅透明导电材料被应用于透明电加热和电磁屏蔽领域,并表现出优异的效果.在8.2和12.4 GHz频段下,其屏蔽效能分别达到44.7和36.6 dB,是目前报道的可见-红外透明屏蔽材料中性能最佳的材料.这使其在夜视仪光电探测光学窗口的除霜除雾和电磁屏蔽应用中展现出广阔的应用前景.

关 键 词：infrared visible transparent conductors electromagnetic shielding Cu mesh 

分 类 号：TN9[电子电信—信息与通信工程]