期刊
SENSORS AND ACTUATORS B-CHEMICAL
卷 190, 期 -, 页码 408-413出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.snb.2013.08.064
关键词
Room temperature LPG sensor; p-CZTS/n-ZnO heterojunction; CZTS thin film; Nanosized ZnO thin film; Gas sensing mechanism; Gas response
资金
- Human Resource and Development of the Korea Institute of Energy Technology Evolution and Planning (KETEP)
- Korea government Ministry of Knowledge and Economy [20124010203180]
- National Research Foundation of Korea (NRF)
- Korean government (MEST) [2011-0016564]
- Center for inorganic photovoltaic materials [2012-0001170]
In the present manuscript, we report for the first time Cu2ZnSnS4 (CZTS)-based heterojunction (p-CZTS/nZnO) used for room temperature liquefied petroleum gas (LPG) sensing. Specifically, the nanostructured ZnO has been grown chemically onto the sputtered CZTS thin films. The formations of phase pure CZTS and ZnO are confirmed by X-ray diffraction studies. The high quality heterojunction between compact CZTS and nanosized ZnO is obtained. At room temperature, the CZTS-based heterojunction exhibited gas response of 19.3% upon exposure to 1200 ppm of LPG with faster response and recovery time of 70 and 40 s. (C) 2013 Elsevier B.V. All rights reserved.
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