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김형준,이정효,곽찬규,손원근,박원호,이택승,Kim, Hyung-Jun,Lee, Jung-Hyo,Kwak, Chan-Kyu,Son, Won-Keun,Park, Won-Ho,Lee, Taek-Seung The Korean Fiber Society 2006 한국섬유공학회지 Vol.43 No.5
Four copolymers of 9,9-dihexylfluorene and benzothiadiazole derivatives with or without quinoxaline were newly synthesized via Suzuki coupling reaction and characterized. The conjugated polymers with benzothiadiazole moiety in the main chain emitted green fluorescence, while their reduced polymers showed blue emission due to perturbation in the donor-acceptor structure. The polymers were spin-cast into thin films in the presence or absence of photoacid generator and well-defined fluorescence patterns were fabricated on the films by simple UV irradiation. The polymer was electrospun with poly(methyl methacrylate) to produce flexible fibrous mats. Fluorescence patterning was also conducted onto the electrospun fiber web to obtain a stable and flexible pattern without bending damage.
이민기와 플루오렌기를 주쇄에 함유하는 고분자의 광기전 성질
김형준,이정효,곽찬규,진성호,이택승,Kim, Hyung-Jun,Lee, Jung-Hyo,Kwak, Chan-Kyu,Jin, Sung-Ho,Lee, Taek-Seung 한국섬유공학회 2008 한국섬유공학회지 Vol.45 No.1
New polyimine derivative containing fluorene group in the main chain was synthesized via Suzuki cross-coupling polymerization, reduction, and imine formation reaction, consecutively. The synthesized polymer was characterized and explored as organic photovoltaic cell device. The imine polymer P3 in diluted chloroform solution emitted red light (582 nm), whereas its precursor polymers P1 and P2 showed green (about 530 nm) and blue fluorescence (477 nm), respectively. Bulk heterojunction photovoltaic cells fabricated by blending P3 with the fullerene derivative PCBM was found to have a power conversion efficiency of upto 0.0005%, while cells from blending P3 with MEH-PPV yielded 0.0008% of power conversion efficiency.