화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Macromolecular Research, Vol.23, No.4, 367-376, April, 2015
DOI10.1007/s13233-015-3042-0  Export Citation
Synthesis and characterization of conjugated oligoelectrolytes based on fluorene and carbazole derivative and application of polymer solar cell as a cathode buffer layer
Thu Trang Do, Hee Seob Hong, Ye Eun Ha, Seong Il Yoo, Yong Sun Won1, Myoung-Jun Moon2, and Joo Hyun Kim†
  • Department of Polymer Engineering, Pukyong National University, Yongdang-Dong, Nam-Gu, Busan, 608-739, Korea
  • 1Department of Chemical Engineering, National University, Yongdang-Dong, Nam-Gu, Busan, 608-739, Korea
  • 2Department of Applied Chemistry, Pukyong National University, Yongdang-Dong, Nam-Gu, Busan, 608-739, Korea
E-mail:
It has been previously reported that the performances of bulk heterojunction polymer solar cells (PSCs) can be improved by incorporation of alcohol/water-soluble conjugated polyelectrolytes as cathode interlayers. Herein, we investigate the effect of three π-conjugated oliogoelectrolytes based on fluorene and carbazole derivatives with quaternary ammonium bromide called 6,6′,6″,6′″,6″″,6′″″-(9H,9′H,9″H-[2,3′:6′,2″-terfluorene]-9,9,9′,9′,9″,9″-hexayl)hexakis(N,N,N-trimethylhexan-1-aminium) bromide (FFiF), 6,6′,6″,6′″-((9-(6-(trimethylammonio)hexyl)-9H-carbazole-3,6-diyl)bis(9H-fluorene-9,9,2-triyl))tetrakis (N,N,N-trimethylhexan-1-aminium) bromide (FCiF), and 6,6′,6″,6′″-((9-hexyl-9H-carbazole-3,6-diyl)bis(9H-fluorene-9,9,2-triyl))tetrakis(N,N,N-trimethylhexan-1-aminium) bromide (FCF) as a cathode buffer layer between the active layer and the Al electrode on the photovoltaic properties of conventional type PSCs. The best power conversion efficiency (PCE) of PSCs with the FCF layer is 3.25%, which increases by 24% compared to that of PSCs without any cathode buffer layer (2.62%). The PCE improvement is due to enhancement of the short circuit current, the fill factor, and the open circuit voltage, simultaneously. Interface dipole formation between the active layer and the Al cathode was proposed to explain the improved performances.
Keywords:conjugated oligoelectrolyte;cathode buffer layer;fluorene;carbazole;polymer solar cell
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