Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Real-Time Monitoring of Laser-Induced Functionalisation of Transparent Conductive Oxide Films

Version 1 : Received: 12 September 2023 / Approved: 13 September 2023 / Online: 14 September 2023 (04:28:22 CEST)

A peer-reviewed article of this Preprint also exists.

Hosokai, T.; Nomoto, J. The Real-Time Monitoring of the Laser-Induced Functionalization of Transparent Conductive Oxide Films. Nanomaterials 2023, 13, 2706. Hosokai, T.; Nomoto, J. The Real-Time Monitoring of the Laser-Induced Functionalization of Transparent Conductive Oxide Films. Nanomaterials 2023, 13, 2706.

Abstract

Laser-induced functionalisation using excimer laser irradiation has been widely applied to transparent conductive oxide films. However, exploring suitable irradiation conditions is time-consuming and cost-ineffective as there are numerous routine film fabrication and analytical processes. Thus, we herein explored a real-time technique to monitor the laser-induced functionalisation of transparent conductive oxide films. We developed two types of monitoring apparatus, electrical and optical, and applied them to magnetron-sputtered Sn-doped In2O3 films grown on glass substrates and hydrogen-doped In2O3 films on glass or plastic substrates using a picosecond Nd:YAG pulsed laser. Both techniques could monitor the functionalisation from a change in properties of the films on glass substrates by laser irradiation, but electrical measurement was unsuitable for plastic samples because of a laser-induced degradation of the underlying plastic substrate, which harmed proper electrical contact. Instead, we demonstrated that the optical properties in the near-infrared region were suitable for the monitoring and the changes in the optical properties were visually detected in real-time by using a near-infrared camera.

Keywords

transparent conducting oxide films; laser irradiation; photo-functionalisation; real-time monitoring; Nd:YAG laser

Subject

Engineering, Electrical and Electronic Engineering

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