Enhanced NO2 Sensitivity in Schottky-Contacted n-Type SnS2 Gas Sensors
Source abstract
Abstract
Layered materials are highly attractive in gas sensor research due to their extraordinary electronic and physicochemical properties. The development of cheaper and faster room-temperature detectors with high sensitivities especially in the parts per billion level is the main challenge in this rapidly developing field. Here, we show that sensitivity to NO2 (S) can be greatly improved by at least two orders of magnitude using an n-type electrode metal. Unconventionally for such devices, the ln(S) follows the classic Langmuir isotherm model rather than S as is for a p-type electrode metal. Excellent device sensitivities, as high as 13,000% for 9 ppm and 97% for 1 ppb NO2, are achieved with Mn electrodes at room temperature, which can be further tuned and enhanced with the application of a bias. Long-term stability, fast recovery, and strong selectivity toward NO2 are also demonstrated. Such impressive features provide a real solution for designing a practical high-performance layered material-based gas sensor.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: 2D Materials and Applications · Gas Sensing Nanomaterials and Sensors · Perovskite Materials and Applications
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Physics, Beijing Institute of Technology, Beijing 100081, P. R. China
Elementary Educational College, Beijing key Laboratory for Nano-Photonics and Nano-Structure, Capital Normal University, Beijing 100048, P. R. China
Institute of Microstructure and Property of Advanced Materials, Beijing University of Technology, Beijing, 100124, China
Foshan (Southern China) Institute for New Materials, Guangdong 528000, China
CRANN and AMBER, School of Chemistry, Trinity College, Dublin Dublin 2, Ireland
Department of Electronics Engineering, National Kaohsiung University of Science and Technology, Kaohsiung 807, Taiwan, ROC
Department of Physics, National Taiwan University, Taipei 106, Taiwan
Funding
Ministry of Science and Technology of the People's Republic of China · Beijing Institute of Technology · National Natural Science Foundation of China
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