標題: Synthesis and Characterization of Donor-Bridge-Acceptor Alternating Copolymers Containing Perylene Diimide Units and Their Application to Photovoltaic Cells
作者: Yuan, Mao-Chuan
Su, Ming-Hsin
Chiu, Mao-Yuan
Wei, Kung-Hwa
材料科學與工程學系
Department of Materials Science and Engineering
關鍵字: conjugated polymers;copolymerization;heteroatom-containing polymers;perylene diimide;photovoltaic cells
公開日期: 15-三月-2010
摘要: We have used Suzuki coupling to prepare a series of alternating copolymers featuring coplanar cyclopentadithiophene and hole-transporting carbazole units. We observed quenching in the photoluminescence spectra of our polymers after incorporating pendent electron-deficient perylene diimide (PDI) moieties on the side chains, indicating more efficient photoinduced electron transfer. Electrochemical measurements revealed that the PDI-containing copolymers displayed reasonable and sufficient offsets of the energy levels of their lowest unoccupied molecular orbitals for efficient charge dissociation. The performance of bulk heterojunction photovoltaic cells incorporating the copolymer/[6,6]-phenyl-C(61)-butyric acid methyl ester blends (1:4, w/w) was optimized when the active layer had a thickness of 70 nm. The photocurrents of the devices were enhanced as a result of the presence of the PDI moieties, thereby leading to improved power conversion efficiencies. (C) 2010 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 48: 1298-1309, 2010
URI: http://dx.doi.org/10.1002/pola.23889
http://hdl.handle.net/11536/5708
ISSN: 0887-624X
DOI: 10.1002/pola.23889
期刊: JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
Volume: 48
Issue: 6
起始頁: 1298
結束頁: 1309
顯示於類別:期刊論文


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