119th General Meeting of the KCS

Type Poster Presentation
Area 유기화학
Room No. 포스터발표장
Time 4월 20일 (목요일) 11:00~12:30
Code ORGN.P-211
Subject Strategies for improving high efficiency by using 6-(2-thienyl)-4H-thieno[3,2-b]indole and fluorinated benzothiadiazole for organic solar cells
Authors 윤준태, 서홍석*
부산대학교 화학과, Korea
Abstract Polymer solar cells (PSCs) is the most powerful alternative energy source because of their strong points such as low cost, large area, ultra-weight and solution processing. To grow the power conversion efficiency(PCE) up, we designed and successfully synthesized polymers, fluorinated dithienylbenzothiadiazole (DTBT) as an electron accepting group and 6-(2-thienyl)-4H-thieno[3,2-b]indole as an electron donating group. One of the strategies for high efficiency in organic solar cells is that fluorine atom is introduced in conjugated polymer because of the strong electron-withdrawing ability of fluorine, the synthesized polymers with fluorine atom indicated deep high molecular orbital (HOMO) energy levels. The device using the PTTIF1:PC71BM (1:1w/w) blend without additive showed power conversion efficiency (PCE) of 3.71% and the device using the PTTIF2:PC71BM (1:1w/w) blend with chloro-naphthalene (CN) additive showed PCE of 4.36%.
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