Megahertz-wave-transmitting conducting polymer electrode for device-to-device integration

Taehoon Kim, Gwangmook Kim, Hyeohn Kim, Hong-Jib Yoon, Taeseong Kim, Yohan Jun, Tae-Hyun Shin, Shinill Kang, Jinwoo Cheon, Dosik Hwang, Byung-wook Min and Wooyoung Shim ()
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Taehoon Kim: Yonsei University
Gwangmook Kim: Yonsei University
Hyeohn Kim: Yonsei University
Hong-Jib Yoon: Yonsei University
Taeseong Kim: Yonsei University
Yohan Jun: Yonsei University
Tae-Hyun Shin: Yonsei University
Shinill Kang: Yonsei University
Jinwoo Cheon: Yonsei University
Dosik Hwang: Yonsei University
Byung-wook Min: Yonsei University
Wooyoung Shim: Yonsei University

Nature Communications, 2019, vol. 10, issue 1, 1-11

Abstract: Abstract The ideal combination of high optical transparency and high electrical conductivity, especially at very low frequencies of less than the gigahertz (GHz) order, such as the radiofrequencies at which electronic devices operate (tens of kHz to hundreds of GHz), is fundamental incompatibility, which creates a barrier to the realization of enhanced user interfaces and ‘device-to-device integration.’ Herein, we present a design strategy for preparing a megahertz (MHz)-transparent conductor, based on a plasma frequency controlled by the electrical conductivity, with the ultimate goal of device-to-device integration through electromagnetic wave transmittance. This approach is verified experimentally using a conducting polymer, poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS), the microstructure of which is manipulated by employing a solution process. The use of a transparent conducting polymer as an electrode enables the fabrication of a fully functional touch-controlled display device and magnetic resonance imaging (MRI)-compatible biomedical monitoring device, which would open up a new paradigm for transparent conductors.

Date: 2019
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DOI: 10.1038/s41467-019-08552-z

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