Journal
RSC ADVANCES
Volume 8, Issue 1, Pages 390-395Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c7ra11149e
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Funding
- Natural Science Foundation of China [NSFC 51372143, 51102151]
- Natural Science Foundation of Shandong Province [ZR2011EMQ002]
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A room-temperature NO2 gas sensor with excellent performances is fabricated using an MAPbI(3) (MA = CH3NH3+) thin film. It presents a high response even under extremely low NO2 concentrations. Its average response and recovery times are only similar to 5 s and similar to 25 s at room temperature, respectively, exhibiting its quick-responsive character. In addition, the MAPbI(3)-based NO2 sensor exhibits good selectivity. Interestingly, the sensitivity of the MAPbI(3)-based NO2 sensor is strikingly improved under high-pressure gas conditions. This phenomenon can be used for the online monitoring of chemical reaction processes and in situ detection of trace-level gas impurities under high-pressure conditions. Furthermore, based on theoretical calculations, a simple model is proposed to illustrate the corresponding gas-sensing mechanism.
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