Nano Pt-decorated transparent solution-processed oxide semiconductor sensor with ppm detection capability

In this study, we fabricated a transparent Pt-decorated indium gallium zinc oxide (IGZO) thin film based on a solution process to demonstrate a portable, low-cost volatile organic compound (VOC) based real-time monitoring system with the detection capability at as low as 1 ppm. The Pt/IGZO sensor sh...

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Bibliographic Details
Published in:RSC advances 2019-02, Vol.9 (11), p.6193-6198
Main Authors: Kang, Jingu, Kim, Kyung-Tae, Jeon, Seoung-Pil, Facchetti, Antonio, Kim, Jaekyun, Park, Sung Kyu
Format: Article
Language:English
Subjects:
Catalysis
Catalytic activity
Chemistry
Decoration
Dynamic response
Gallium
Indium gallium zinc oxide
Low cost
Nanoparticles
Organic chemistry
Photoionization
Recovery time
Reproducibility
Sensitivity enhancement
Sensors
Thin films
Visibility
VOCs
Volatile organic compounds
Zinc oxide
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Summary:In this study, we fabricated a transparent Pt-decorated indium gallium zinc oxide (IGZO) thin film based on a solution process to demonstrate a portable, low-cost volatile organic compound (VOC) based real-time monitoring system with the detection capability at as low as 1 ppm. The Pt/IGZO sensor shows remarkable response characteristics upon exposure of isobutylene (2-methylpropene) gas down to 1 ppm while also maintaining the reliability and reproducibility of the sensing capability, which is almost comparable to a commercial VOC sensor based on a photoionization detector (PID) method. For 1 ppm of isobutylene gas, the response and recovery time of the sensor estimated were as low as 25 s ( ) and 80 s ( ), respectively. The catalytic activity of Pt nanoparticles on an IGZO nano-thin film plays a key role in drastically enhancing the sensitivity and dynamic response behaviour of the VOC sensor. Furthermore, the solution-processed IGZO thin film decorated with Pt nanoparticles also represents a highly transparent (in visible region, ∼90%) and low-cost fabrication platform, thereby, facilitating the optical visibility and disposability for future applications in the field of electronics. Therefore, we believe that the nano-Pt/IGZO hybrid material for VOC sensor developed by us will pave a way to detect any harmful chemical gases and VOCs in various environments.
ISSN:2046-2069
2046-2069
DOI:10.1039/c8ra09917k