Highly Transparent and Broadband Electromagnetic Interference Shielding Based on Ultrathin Doped Ag and Conducting Oxides Hybrid Film Structures

ACS Applied Materials & Interfaces
Heyan WangL Jay Guo

Abstract

Reducing electromagnetic interference (EMI) across a broad radio frequency band is crucial to eliminate adverse effects of increasingly complex electromagnetic environment. Current shielding materials or methods suffer from trade-offs between optical transmittance and EMI shielding capability. Moreover, poor mechanical flexibility and fabrication complexity significantly limit their further applications in flexible electronics. In this work, an ultrathin (8 nm) and continuous doped silver (Ag) film was obtained by introducing a small amount of copper during the sputtering deposition of Ag and investigated as transparent EMI shielding components. The electromagnetic Ag shielding (EMAGS) film was realized in the form of conductive dielectric-metal-dielectric design to relieve the electro-optical trade-offs, which transmits 96.5% visible light relative to the substrate and shows an excellent average EMI shielding effectiveness (SE) of ∼26 dB, over a broad bandwidth of 32 GHz, covering the entire X, Ku, Ka, and K bands. EMI SE >30 dB was obtained by simply stacking two layers of EMAGS films together and can be further improved up to 50 dB by separating two layers with a quarter-wavelength space. The flexible EMAGS film shows a stab...Continue Reading

References

Oct 13, 2006·Environmental Health Perspectives·Leeka KheifetsRiti Shimkhada
Feb 3, 2009·Optics Letters·D S GhoshV Pruneri
Mar 4, 2011·ACS Applied Materials & Interfaces·Hao-Bin ZhangZhong-Zhen Yu
Apr 27, 2012·Langmuir : the ACS Journal of Surfaces and Colloids·Mingjun HuRobert Kwok-Yiu Li
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Oct 23, 2012·Nanotechnology·Seul Ki HongByung Jin Cho
Mar 21, 2015·Nature Communications·Osman BalciCoskun Kocabas
Mar 21, 2018·ACS Applied Materials & Interfaces·Li-Chuan JiaZhong-Ming Li

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Citations

Sep 10, 2021·Nanoscale·Koorosh EstekiClaudia Gomes da Rocha
Jan 8, 2022·ACS Applied Materials & Interfaces·Si-Yuan LiaoChing-Ping Wong
Jan 27, 2022·ACS Applied Materials & Interfaces·Sangeon Lee, L Jay Guo

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