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권나연,김영서,박수홍,조승욱,Meenal Kataria,조민주,박성남,최동훈 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.2
In this study, we have designed and synthesized the three aromatic imide-based novel dyad polymers, which show the different photo-physical properties. These polymers consist of the donor backbone and different imide side chain. The photophysical and electrochemical characteristics of the different dyes have been studied using various techniques including UV-visible absorption and photoluminescence spectroscopy. Among three, BT-PDI polymer performed as an efficient naked eye sensing portable probe for Fe2+ ions and showed “turn-on” fluorescence response with detection limit of picomolar level. This generated BT-PDI polymer ∩ Fe2+ complex can be used for the ultrasensitive detection of spermine as in aqueous medium, in urine samples and in the vapor phase. This complex can be established as an efficient portable kit for detection of spermine in terms of a solution-based test kit for real time detection of spermine in vapor released from fermented food samples.
Hong Diem Chau,Meenal Kataria,권나연,박수홍,김영서,강훈구,Amit Kumar Harit,우한영,윤효재,박성남,조민주,최동훈 한국고분자학회 2022 Macromolecular Research Vol.30 No.8
Recently, all-polymer solar cells (all-PSCs) have realized significantly improved power conversion efficiencies (PCEs) through the development of various high-performance polymer donors and polymer acceptors. In addition, their device efficiency has been maximized using numerous strategies, such as thermal annealing and adding additives. In this study, we synthesized a new low-bandgap polymer acceptor (PTPB-TT) for application in all-PSCs. PTPB-TT exhibited adequate energy levels as a polymer acceptor and efficient complementary absorption behavior in the blend film. Moreover, we introduced a ternary system with [6,6]-phenyl-C61-butyric acid methyl ester (PC61BM) as the third-component acceptor to improve the light-harvesting properties and morphology of the binary blend film. PC61BM realizes the cascade energy levels in the ternary system, enabling more efficient charge transfer between the donor and the acceptor polymers than in the binary system. Therefore, the corresponding ternary devices displayed a relatively high PCE of 8.03% compared to the binary all-PSCs.