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Improvement of NO₂ Gas Sensing Abilities in Polythiophene Film with en-APTAS Additives
장두호,박영돈 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
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.
유기광전자소자의 전기적 성능 향상을 위한 첨가제의 최적화
장두호,김대환,이지은,박영돈 한국고분자학회 2022 폴리머 Vol.46 No.4
Since organic semiconductor thin films can be fabricated in a large area by a solution process, the organic optoelectronic devices have many advantages in terms of manufacturing costs compared to inorganic electronic devices andlight and flexible electronic devices can be implemented, which is suitable for wearable devices due to the soft characteristics of organic molecules. However slow charge transport characteristics and low stability, compared to inorganicsemiconductor-based electronic devices, are challenges to the commercialization of organic electronic devices. Manyresearchers are developing a self-assembled thin film optimized for crystallinity, morphology, and molecular orientationto improve the performance of organic optoelectronic devices. Herein we examine various additives that can induce selfassembly of a conducting polymer used as an active layer in organic optoelectronic devices and examines the effect ofadditives’ solubility parameter on the self-assembly behavior of conducting polymer and their correlation with the deviceperformance.