dc.contributor.authorXu, Xiaofeng
dc.contributor.authorCai, Ping
dc.contributor.authorLu, Yong
dc.contributor.authorChoon, Ng Siu
dc.contributor.authorChen, Junwu
dc.contributor.authorHu, Xiao
dc.contributor.authorOng, Beng S.
dc.date.accessioned2014-04-07T03:13:19Z
dc.date.available2014-04-07T03:13:19Z
dc.date.copyright2012en_US
dc.date.issued2012
dc.identifier.citationXu, X., Cai, P., Lu, Y., Choon, N. S., Chen, J., Hu, X., et al. (2013). Synthesis and characterization of thieno[3,2-b]thiophene-isoindigo-based copolymers as electron donor and hole transport materials for bulk-heterojunction polymer solar cells. Journal of Polymer Science Part A: Polymer Chemistry, 51(2), 424-434.en_US
dc.identifier.issn0887-624Xen_US
dc.identifier.urihttp://hdl.handle.net/10220/19144
dc.description.abstractA novel class of thieno[3,2-b]thiophene (TT) and isoindigo based copolymers were synthesized and evaluated as electron donor and hole transport materials in bulk-heterojunction polymer solar cells (BHJ PSCs). These π-conjugated donor-acceptor polymers were derived from fused TT and isoindigo structures bridged by thiophene units. The band-gaps and the highest occupied molecular orbital (HOMO) levels of the polymers were tuned using different conjugating lengths of thiophene units on the main chains, providing band-gaps from 1.55 to 1.91 eV and HOMO levels from −5.34 to −5.71 eV, respectively. The corresponding lowest unoccupied molecular orbital (LUMO) levels were appropriately adjusted with the isoindigo units. Conventional BHJ PSCs (ITO/PEDOT:PSS/active layer/interlayer/Al) with an active layer composed of the polymer and PC71BM were fabricated for evaluation. Power conversion efficiency from a low of 1.25% to a high of 4.69% were achieved with the best performing device provided by the D−π−A polymer with a relatively board absorption spectrum, high absorption coefficient, and more uniform blend morphology. These results demonstrate the potential of this class of thieno[3,2-b]thiophene-isoindigo-based polymers as efficient electron donor and hole transport polymers for BHJ PSCs.en_US
dc.language.isoenen_US
dc.relation.ispartofseriesJournal of polymer science part A : polymer chemistryen_US
dc.rights© 2012 Wiley Periodicals, Inc.en_US
dc.subjectDRNTU::Science::Chemistry
dc.titleSynthesis and characterization of thieno[3,2-b]thiophene-isoindigo-based copolymers as electron donor and hole transport materials for bulk-heterojunction polymer solar cellsen_US
dc.typeJournal Article
dc.contributor.schoolSchool of Chemical and Biomedical Engineeringen_US
dc.contributor.schoolSchool of Materials Science and Engineeringen_US
dc.identifier.doihttp://dx.doi.org/10.1002/pola.26400


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