Phys.org July 27, 2020
Electromagnetic interference shielding materials are visibly opaque. Researchers in China proposed and fabricated visibly transparent EMI shielding materials using an ultrathin silver layer sandwiched by oxides (SLSO) as building blocks. The structure exhibited 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 suppresses optical reflections as antireflection coatings and enhances EMI shielding via Fabry–Pérot interference. They describe other SLSO-based transparent EMI shielding materials that provide optoelectronic applications with robust safety and reliability under RF radiation with high and broad frequencies…read more. TECHNICAL ARTICLE
Abstract. Credit: ACS Appl. Mater. Interfaces 2020, 12, 23, 26659–26669, May 18, 2020