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Fabrication of Ultra-thin Color Films with Highly Absorbing Media Using Oblique Angle Deposition

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Highly Efficient and Reliable Transparent Electromagnetic Interference Shielding Film.

Li-Chuan Jia, Ding-Xiang Yan, Xiaofeng Liu¹

¹Department of Materials Science and Engineering, Henry Samueli School of Engineering and Applied Science , University of California , Los Angeles , California 90095 , United States.

ACS Applied Materials & Interfaces

|March 21, 2018

Summary

This summary is machine-generated.

Researchers developed a transparent film using calcium alginate, silver nanowires, and polyurethane for electromagnetic interference (EMI) shielding. This film offers high optical transmittance and effective EMI shielding, suitable for electronic displays and optoelectronic devices.

Keywords:

AgNW networks EMI shielding flexible optical transmittance reliable

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Area of Science:

Materials Science
Nanotechnology
Optoelectronics

Background:

Optoelectronic devices require electromagnetic protection, but achieving high optical transmittance and effective electromagnetic interference (EMI) shielding simultaneously is challenging.
Existing transparent EMI shielding materials often compromise on optical clarity or shielding effectiveness.

Purpose of the Study:

To develop a novel transparent film with excellent EMI shielding effectiveness (SE) and high optical transmittance.
To investigate the potential of calcium alginate (CA), silver nanowires (AgNWs), and polyurethane (PU) composite for optoelectronic applications.

Main Methods:

Fabrication of a transparent CA/AgNW/PU film using a cost-effective Mayer-rod coating method.
Characterization of the film's optical transmittance and EMI shielding effectiveness (SE).
Evaluation of the film's durability under ultrasound treatment and bending stress.

Main Results:

The CA/AgNW/PU film achieved 92% optical transmittance and 20.7 dB EMI SE, meeting commercial requirements.
Enhanced EMI SE of 31.3 dB was observed while maintaining 81% transmittance.
The film demonstrated superior performance compared to most reported transparent EMI shielding materials.
High EMI SE retention (98% after ultrasound, 96% after 5000 bending cycles) confirmed reliable shielding in harsh environments.

Conclusions:

The developed CA/AgNW/PU film offers an optimal balance of high optical transmittance and efficient EMI shielding.
The facile fabrication process and robust performance make it a promising material for advanced optoelectronic devices.
This material holds significant potential for applications in flexible solar cells, displays, and touch panels.