화학공학소재연구정보센터
학회 한국화학공학회
학술대회 2019년 가을 (10/23 ~ 10/25, 대전컨벤션센터)
권호 25권 2호, p.1248
발표분야 고분자 (Polymer)
제목 Breath-figure molding of polymer transistors to implement flexible and high performance NOx sensors
초록 Strategically designed polymer semiconductor thin film morphology with both high responsivity to the specific gas analyte and high signal transport efficiency is reported to realize highly selective/sensitive flexible NOx sensors. Breath-Figure (BF) molding of polymer semiconductor enables finely defined degree-of-porosity of film with high reproducibility, while conserving charge transport nature of organic field effect transistor (OFET). The optimized BF-OFET with donor-acceptor copolymer renders the maximum responsivity over 104 %, sensitivity over 774 %/ppm and limit of detection (LOD) of 110 ppb against NO exposure. From wide dynamic range of 0.2-10 ppm NO exposure, the response time was maintained as 100-300 seconds which is fast enough for safety purpose in practical application. Selectivity to NOx analytes is tested by comparing the responsivity of BF-OFET to various gases. Finally, flexible BF-OFET is demonstrated on a plastic substrate which maintains a sensitivity of 500 %/ppm and LOD of 215 ppb after 10,000 bending tests at 1% strain.
저자 유성훈1, Henok Getachew Girma2, 심규민1, 윤성원1, 박종목2, 공호열2, 정대성1
소속 1대구경북과학기술원, 2한국화학(연)
키워드 고분자
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