Improvement of NO<sub>2</sub> Gas Sensing Ability in Polythiophene film with 2D Zeolite
발표자
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초록
내용
Recently, many researchers have tried to improve the responsivity of gas sensors based on conjugated polymer. To enhance the gas sensing performance of device, we fabricated a poly(3-hexylthiophene) (P3HT) thin films by adding ITQ-2 (2D Aluminosilicate MWW) zeolite for enhancing sensor performance. The 2D MWW zeolite has abundant hydroxyl groups that can act as adsorption sites for oxidizing gas, therefore 2D MWW zeolite is expected to improve NOx and SOx responsivity. P3HT films with MWW zeolite showed higher NO2 responsivity than pristine film, and especially the P3HT film blended with 2D MWW zeolite represented the highest responsivity, response and recovery rates. However, when more than 50 wt% of zeolite was added, the gas sensing performance of devices started to decrease due to the large aggregation of MWW. These results demonstrated the harmful gas sensing detection of the organic gas sensor was enhanced by dimension and an appropriate amount of zeolite.