The issue of increased electromagnetic pollution has sparked widespread demands for electromagnetic interference (EMI) shielding technology in specialized applications such as optical windows and periscopes. More importantly, the materials maintaining a high transmittance and excellent EMI shielding stability in harsh environments still remain an urgent challenge. In this work, a multilayered PDMS/ITO/Ag/ITO (PIAI) film is constructed by magnetron sputtering and spin-coating techniques. The PIAI film with a sandwiched structure design exhibited an efficient shielding effectiveness of 35 dB in the X-band while boasting an impressive transmittance of 89% at 550 nm ascribed to refractive index matching of the PDMS layer and phase cancellation interference between ITO layers. It also represented satisfying corrosion resistance and chemical stability, with a slight shielding effectiveness decrease of 5% after immersing for 24 h in 5 wt % NaCl solution. Therefore, the as-obtained multilayered film integrates the multifunctionality of efficient EMI shielding, high light transmission, and excellent corrosion resistance, offering a promising avenue for transparent EMI shielding films applied to visible windows in a harsh environment.
Keywords: antireflection; corrosion-resistant; electromagnetic shielding; multilayer film; transmittance.