Room temperature wafer-scale synthesis of highly transparent, conductive CuS nanosheet films via a simple sulfur adsorption-corrosion method

Hong, John, Kim, Byung-Sung, Hou, Bo ORCID: https://orcid.org/0000-0001-9918-8223, Pak, Sangyeon, Kim, Taehun, Jang, A-Rang, Cho, Yuljae, Lee, Sanghyo, An, Geon-Hyoung, Jang, Jae Eun, Morris, Stephen M., Sohn, Jung Inn and Cha, SeungNam 2021. Room temperature wafer-scale synthesis of highly transparent, conductive CuS nanosheet films via a simple sulfur adsorption-corrosion method. ACS Applied Materials and Interfaces 13 (3) , pp. 4244-4252. 10.1021/acsami.0c21957

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Abstract

The development of highly conductive electrodes with robust mechanical durability and clear transmittance in the visible to IR spectral range is of great importance for future wearable/flexible electronic applications. In particular, low resistivity, robust flexibility, and wide spectral transparency have a significant impact on optoelectronic performance. Herein, we introduce a new class of covellite copper monosulfide (CuS) nanosheet films as a promising candidate for soft transparent conductive electrodes (TCEs). An atmospheric sulfur adsorption-corrosion phenomenon represents a key approach in our work for the achievement of wafer-scale CuS nanosheet films through systematic control of the neat Cu layer thickness ranging from 2 to 10 nm multilayers at room temperature. These nanosheet films provide outstanding conductivity (∼25 Ω sq–1) and high transparency (> 80%) in the visible to infrared region as well as distinct flexibility and long stability under air exposure, yielding a high figure-of-merit (∼60) that is comparable to that of conventional rigid metal oxide material-based TCEs. Our unique room temperature synthesis process delivers high quality CuS nanosheets on any arbitrary substrates in a short time (< 1 min) scale, thus guaranteeing the widespread use of highly producible and scalable device fabrication.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Physics and Astronomy
Publisher:	American Chemical Society
ISSN:	1944-8244
Date of First Compliant Deposit:	14 January 2021
Date of Acceptance:	5 January 2021
Last Modified:	06 Nov 2023 23:33
URI:	https://orca.cardiff.ac.uk/id/eprint/137657

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