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Article: Two-dimensional like conjugated copolymers for high efficiency bulk-heterojunction solar cell application: Band gap and energy level engineering

TitleTwo-dimensional like conjugated copolymers for high efficiency bulk-heterojunction solar cell application: Band gap and energy level engineering
Authors
Keywordsband gaps
bulk-heterojunction solar cells
conjugated polymers
two-dimensional like polymers
Issue Date2011
PublisherScience China Press, co-published with Springer. The Journal's web site is located at http://chem.scichina.com:8081/sciBe/EN/volumn/current.shtml
Citation
Science China Chemistry, 2011, v. 54 n. 4, p. 685-694 How to Cite?
AbstractThree two-dimensional like conjugated copolymers PFSDCN, PFSDTA and PFSDCNIO, which consist of alternating fluorene and triphenylamine main chain, and different pendant acceptor groups (malononitrile, 1,3-diethtyl-2- thiobarbituric acid and 2-(1,2-dihydro-1-oxoinden-3-ylidene)malononitrile) with thiophene as π-bridge, have been designed, synthesized and characterized. The structure-property relationships of the two-dimensional like conjugated copolymers were systematically investigated. The absorption spectra, band gaps, and energy levels of the polymers were effectively tuned by simply attaching different acceptor groups. As the electron-withdrawing ability of the acceptors increased, the band gaps of the polymers were narrowed from 2.05 to 1.61 eV; meanwhile, the LUMO energy levels of the polymers decreased from -3.27 to -3.75 eV, whereas their relatively deep HOMO energy levels of ∼-5.35 eV were preserved. BHJ solar cells were fabricated and characterized by using the three polymers as donor materials and the highest power conversion efficiency of 2.87% was achieved for the device based on PFSDTA:(6,6)-phenyl-C 71-butyric acid methyl ester blend. © 2011 Science China Press and Springer-Verlag Berlin Heidelberg.
Persistent Identifierhttp://hdl.handle.net/10722/135126
ISSN
2015 Impact Factor: 2.429
2015 SCImago Journal Rankings: 0.567
ISI Accession Number ID
Funding AgencyGrant Number
National Natural Science Foundation of China50990065
51010003
51073058
20904011
National Basic Research Program of China2009CB623601
Fundamental Research Funds for the Central Universities
South China University of Technology2009220012
2009220043
UGC400897
University of Hong Kong
Hong Kong Research Grants CouncilHKU712108
HKU712010
Research Grants Council of the Hong Kong Special Administrative Region, China
Funding Information:

This work was financially supported by the National Natural Science Foundation of China (50990065, 51010003, 51073058 and 20904011), the National Basic Research Program of China (973 Program) (2009CB623601) and the Fundamental Research Funds for the Central Universities, South China University of Technology (2009220012, 2009220043). Choy acknowledges the supported UGC grant (#400897) of the University of Hong Kong and Hong Kong Research Grants Council (HKU#712108 and HKU#712010) from the Research Grants Council of the Hong Kong Special Administrative Region, China.

References

 

DC FieldValueLanguage
dc.contributor.authorDuan, Cen_HK
dc.contributor.authorWang, Cen_HK
dc.contributor.authorLiu, Sen_HK
dc.contributor.authorHuang, Fen_HK
dc.contributor.authorChoy, CHWen_HK
dc.contributor.authorCao, Yen_HK
dc.date.accessioned2011-07-27T01:28:35Z-
dc.date.available2011-07-27T01:28:35Z-
dc.date.issued2011en_HK
dc.identifier.citationScience China Chemistry, 2011, v. 54 n. 4, p. 685-694en_HK
dc.identifier.issn1674-7291en_HK
dc.identifier.urihttp://hdl.handle.net/10722/135126-
dc.description.abstractThree two-dimensional like conjugated copolymers PFSDCN, PFSDTA and PFSDCNIO, which consist of alternating fluorene and triphenylamine main chain, and different pendant acceptor groups (malononitrile, 1,3-diethtyl-2- thiobarbituric acid and 2-(1,2-dihydro-1-oxoinden-3-ylidene)malononitrile) with thiophene as π-bridge, have been designed, synthesized and characterized. The structure-property relationships of the two-dimensional like conjugated copolymers were systematically investigated. The absorption spectra, band gaps, and energy levels of the polymers were effectively tuned by simply attaching different acceptor groups. As the electron-withdrawing ability of the acceptors increased, the band gaps of the polymers were narrowed from 2.05 to 1.61 eV; meanwhile, the LUMO energy levels of the polymers decreased from -3.27 to -3.75 eV, whereas their relatively deep HOMO energy levels of ∼-5.35 eV were preserved. BHJ solar cells were fabricated and characterized by using the three polymers as donor materials and the highest power conversion efficiency of 2.87% was achieved for the device based on PFSDTA:(6,6)-phenyl-C 71-butyric acid methyl ester blend. © 2011 Science China Press and Springer-Verlag Berlin Heidelberg.en_HK
dc.languageengen_US
dc.publisherScience China Press, co-published with Springer. The Journal's web site is located at http://chem.scichina.com:8081/sciBe/EN/volumn/current.shtmlen_HK
dc.relation.ispartofScience China Chemistryen_HK
dc.rightsThe original publication is available at www.springerlink.com-
dc.subjectband gapsen_HK
dc.subjectbulk-heterojunction solar cellsen_HK
dc.subjectconjugated polymersen_HK
dc.subjecttwo-dimensional like polymersen_HK
dc.titleTwo-dimensional like conjugated copolymers for high efficiency bulk-heterojunction solar cell application: Band gap and energy level engineeringen_HK
dc.typeArticleen_HK
dc.identifier.emailChoy, CHW:chchoy@eee.hku.hken_HK
dc.identifier.authorityChoy, CHW=rp00218en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s11426-011-4257-3en_HK
dc.identifier.scopuseid_2-s2.0-79954528231en_HK
dc.identifier.hkuros188399en_US
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-79954528231&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume54en_HK
dc.identifier.issue4en_HK
dc.identifier.spage685en_HK
dc.identifier.epage694en_HK
dc.identifier.isiWOS:000289299400018-
dc.publisher.placeChinaen_HK
dc.identifier.scopusauthoridDuan, C=27367751100en_HK
dc.identifier.scopusauthoridWang, C=37113178400en_HK
dc.identifier.scopusauthoridLiu, S=36876641000en_HK
dc.identifier.scopusauthoridHuang, F=34769983300en_HK
dc.identifier.scopusauthoridChoy, CHW=7006202371en_HK
dc.identifier.scopusauthoridCao, Y=36042143300en_HK

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