| 초록 |
Recently, many researchers tried to improve the responsivity of organic sensors based on conjugated polymer. To enhance the performance of sensor, we fabricated a poly(3-hexylthiophene-2,5-diyl)(P3HT) thin films by adding various amounts of N-[3-(Trimethoxysilyl)propyl]ethylene-diamine (en-APTAS) for enhanced sensor performance. The en-APTAS molecule has two amine groups that can act as adsorption sites for NO2 gas, therefore en-APTAS additive is expected to enhance NO2 responsivity. By adding various contents of en-APTAS to P3HT films, all P3HT films with additive showed higher NO2 responsivity than pristine film, and especially 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 started to decrease due to the large aggregation. These results denoted the NO2 sensing performance of the organic sensor was improved by adding an appropriate amount of en-APTAS. |
