NO<SUB>2</SUB> Gas Sensing Enhancement through Strong Interaction by Addition of en-APTAS into Polythiophene Film
발표자
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초록
내용
Improving the responsivity of organic gas sensors based on conjugated polymers is the goal of many scientists. To enhance the performance of sensor, we manufactured a poly(3-hexylthiophene)(P3HT) thin films by adding various contents of N-[3-(Trimethoxysilyl)propyl]ethylene-diamine (en-APTAS) for enhanced sensor performance. The en-APTAS molecule has two amine groups that can make strong interactions for NO2 gas, therefore en-APTAS additive is expected to enhance NO2 responsivity. By adding various amounts of en-APTAS to P3HT films, all P3HT films with additives showed higher NO2 responsivity than Bare film, and especially the P3HT film added with 0.5% en-APTAS represented the highest responsivity, response and recovery rates. However, when more than 1% of en-APTAS was added, the performance of sensor began to deteriorate due to the large aggregation. These results indicated the NO2 detection performance of the organic sensor was improved by adding an proper amount of en-APTAS.