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dc.contributor.authorLi, Kuang-Chiehen_US
dc.contributor.authorHsu, Ying-Chanen_US
dc.contributor.authorLin, Jiann-T'suenen_US
dc.contributor.authorYang, Chang-Chungen_US
dc.contributor.authorWei, Kung-Hwaen_US
dc.contributor.authorLin, Hong-Cheuen_US
dc.date.accessioned2014-12-08T15:09:37Z-
dc.date.available2014-12-08T15:09:37Z-
dc.date.issued2009-04-15en_US
dc.identifier.issn0887-624Xen_US
dc.identifier.urihttp://dx.doi.org/10.1002/pola.23312en_US
dc.identifier.urihttp://hdl.handle.net/11536/7362-
dc.description.abstractFive novel conjugated copolymers (P1-P5) containing coplanar cyclopentadithiophene (CPDT) units (incorporated with arylcyanovinyl and keto groups in different molar ratios) were synthesized and developed for the applications of polymer solar cells (PSCs). Polymers P1-P5 covered broad absorption ranges from U-V to near infrared (400-900 nm) with narrow optical band gaps of 1.38-1.70 eV, which are compatible with the maximum solar photon reflux. Partially reversible p- and n-doping processes of P1-P5 in electrochemical experiments were observed, and the proper molecular design for highest occupied molecular orbital (HOMO)/lowest unoccupied molecular orbital (LUMO) levels of P1-P5 induced the highest photovoltaic open-circuit voltage in the PSC devices, compared with those previously reported CPDT-based narrow-band-gap polymers. Powder X-ray diffraction (XRD) analyses suggested that these copolymers formed self-assembled pi-pi stacking and pseudobilayered structures. Under 100 mW/cm(2) of AM 1.5 white-light illumination, bulk hetero-junction PSC devices containing an active layer of electron donor polymers P1-P5 mixed with electron acceptor [6,6]-phenyl C(61) butyric acid methyl ester (PCBM) in the weight ratio of 1:4 were investigated. The PSC device containing P1 gave the best preliminary result with an open-circuit voltage of 0.84 V, a short-circuit current of 2.36 mA/cm(2), and a fill factor of 0.38, offering an overall power conversion efficiency (PCE) of 0.77% as well as a maximal quantum efficiency of 23% from the external quantum efficiency (EQE) measurements. (C) 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 2073-2092, 2009en_US
dc.language.isoen_USen_US
dc.subjectconjugated polymersen_US
dc.subjectcopolymerizationen_US
dc.subjectcyclopentadithiopheneen_US
dc.subjectheteroatom-containing polymersen_US
dc.subjectpolymer solar cellen_US
dc.titleSoluble Narrow-Band-Gap Copolymers Containing Novel Cyclopentadithiophene Units for Organic Photovoltaic Cell Applicationsen_US
dc.typeArticleen_US
dc.identifier.doi10.1002/pola.23312en_US
dc.identifier.journalJOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRYen_US
dc.citation.volume47en_US
dc.citation.issue8en_US
dc.citation.spage2073en_US
dc.citation.epage2092en_US
dc.contributor.department材料科學與工程學系zh_TW
dc.contributor.departmentDepartment of Materials Science and Engineeringen_US
dc.identifier.wosnumberWOS:000265262800009-
dc.citation.woscount41-
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