| Title: | Low-Temperature Photochemically Activated Amorphous Indium-Gallium-Zinc Oxide for Highly Stable Room-Temperature Gas Sensors |
| Author(s): | Jaisutti R; Kim J; Park SK; Kim YH; |
| Address: | "Department of Physics, Faculty of Science and Technology, Thammasat University , Pathum Thani, Thailand. School of Electrical and Electronic Engineering, Chung-Ang University , Seoul, Korea" |
| Journal Title: | ACS Appl Mater Interfaces |
| ISSN/ISBN: | 1944-8252 (Electronic) 1944-8244 (Linking) |
| Abstract: | "We report on highly stable amorphous indium-gallium-zinc oxide (IGZO) gas sensors for ultraviolet (UV)-activated room-temperature detection of volatile organic compounds (VOCs). The IGZO sensors fabricated by a low-temperature photochemical activation process and exhibiting two orders higher photocurrent compared to conventional zinc oxide sensors, allowed high gas sensitivity against various VOCs even at room temperature. From a systematic analysis, it was found that by increasing the UV intensity, the gas sensitivity, response time, and recovery behavior of an IGZO sensor were strongly enhanced. In particular, under an UV intensity of 30 mW cm(-2), the IGZO sensor exhibited gas sensitivity, response time and recovery time of 37%, 37 and 53 s, respectively, against 750 ppm concentration of acetone gas. Moreover, the IGZO gas sensor had an excellent long-term stability showing around 6% variation in gas sensitivity over 70 days. These results strongly support a conclusion that a low-temperature solution-processed amorphous IGZO film can serve as a good candidate for room-temperature VOCs sensors for emerging wearable electronics" |
| Keywords: | amorphous IGZO gas sensor light intensity room temperature sensitivity; |
| Notes: | "PubMed-not-MEDLINEJaisutti, Rawat Kim, Jaeyoung Park, Sung Kyu Kim, Yong-Hoon eng 2016/07/20 ACS Appl Mater Interfaces. 2016 Aug 10; 8(31):20192-9. doi: 10.1021/acsami.6b05724. Epub 2016 Jul 27" |
