Influence of Charge Carriers Concentration and Mobility on the Gas Sensing Behavior of Tin Dioxide Thin Films
Abstract
:1. Introduction
2. Materials and Methods
3. Results and Discussion
3.1. Composition and Microstructure
3.1.1. X-ray Diffraction
3.1.2. Raman Spectra
3.1.3. Photoluminescence Spectra
3.2. Surface Morphology
3.3. Electrical Properties
3.4. Gas-Sensing Properties
3.4.1. Temperature-Dependent Electrical Properties
3.4.2. Dependence of Gas-Sensing Properties on Carrier Behavior
3.4.3. Response/Recovery Time
4. Conclusions
Author Contributions
Funding
Conflicts of Interest
References
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Samples | d nm | v nm/min | ρ Ohm·cm | n cm3 | μ cm2/V·s | R nm |
---|---|---|---|---|---|---|
Air-annealed SnO2 | − | − | 2.88 × 101 | 1.8 × 1015 | 1.2 × 102 | 4.0 |
As-preparedSnO2 | 171.6 ± 3.2 | 2.86 | 1.34 | 7.0 × 1016 | 7.0 × 101 | 3.7 |
Vacuum-annealed SnO2 | − | − | 4.77 × 10−1 | 2.0 × 1019 | 2.7 × 10−1 | 3.2 |
Air annealed SnO2:F | − | − | 2.35 × 10−2 | 2.1 × 1019 | 1.3 × 101 | 4.2 |
As-prepared SnO2:F | 249.6 ± 4.8 | 4.16 | 3.78 × 10−3 | 1.2 × 1020 | 6.1 | 3.8 |
Vacuum-annealed SnO2:F | − | − | 1.97 × 10−3 | 5.9 × 1021 | 5.3 × 10−1 | 3.5 |
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Li, R.; Zhou, Y.; Sun, M.; Gong, Z.; Guo, Y.; Wu, F.; Li, W.; Ding, W. Influence of Charge Carriers Concentration and Mobility on the Gas Sensing Behavior of Tin Dioxide Thin Films. Coatings 2019, 9, 591. https://doi.org/10.3390/coatings9090591
Li R, Zhou Y, Sun M, Gong Z, Guo Y, Wu F, Li W, Ding W. Influence of Charge Carriers Concentration and Mobility on the Gas Sensing Behavior of Tin Dioxide Thin Films. Coatings. 2019; 9(9):591. https://doi.org/10.3390/coatings9090591
Chicago/Turabian StyleLi, Ruiwu, Yanwen Zhou, Maolin Sun, Zhen Gong, Yuanyuan Guo, Fayu Wu, Weijuan Li, and Wutong Ding. 2019. "Influence of Charge Carriers Concentration and Mobility on the Gas Sensing Behavior of Tin Dioxide Thin Films" Coatings 9, no. 9: 591. https://doi.org/10.3390/coatings9090591