材料科学
电磁屏蔽
电磁干扰
电磁干扰
透射率
光电子学
微波食品加热
光学
无线电频率
不透明度
干扰(通信)
聚对苯二甲酸乙二醇酯
复合材料
电气工程
电信
频道(广播)
工程类
物理
计算机科学
作者
Changwei Yuan,Jinhua Huang,Yuxuan Dong,Xianjun Huang,Yuehui Lu,Jia Li,Tao Tian,Wenqing Liu,Weijie Song
标识
DOI:10.1021/acsami.0c05334
摘要
As a potential risk to human and environmental health, radio frequency (RF) radiation should be studied due to the higher frequencies and larger bandwidths that may be employed. Electromagnetic interference (EMI) shielding materials can prevent exposure to RF radiation, but most of them are visibly opaque. In this work, we propose and fabricate visibly transparent EMI shielding materials using an ultrathin silver layer sandwiched by oxides (SLSO) as building blocks. The samples with a double-sided SLSO (D-SLSO) structure exhibit the highest EMI shielding effectiveness (SE) of 70 dB at 27.6 GHz (>62 dB on average at 4-40 GHz) and a transmittance close to 90% at a visible wavelength of 550 nm, which is comparable with those of polyethylene terephthalate (PET) and glass substrates. The D-SLSO structure plays a dual role: it suppresses optical reflections as antireflection coatings and enhances EMI shielding via Fabry-Pérot interference. In addition, we discuss the origin of the extraordinary frequency dependence of SE, which monotonically increases, contrary to that of conventional metallic mesh. This report describes SLSO-based transparent EMI shielding materials with record-high SE and visible transmittance that provide optoelectronic applications with robust safety and reliability under RF radiation with high and broad frequencies.
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