Selenium in diketopyrrolopyrrole-based polymers: influence on electronic properties and charge carrier mobilities

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dc.citation.epage827en_US
dc.citation.issueNumber5-6en_US
dc.citation.spage817en_US
dc.citation.volumeNumber54en_US
dc.contributor.authorDhar, J.en_US
dc.contributor.authorKanimozhi, C.en_US
dc.contributor.authorYaccobi-Gross, N.en_US
dc.contributor.authorAnthopoulos, T. D.en_US
dc.contributor.authorSalzner, U.en_US
dc.contributor.authorPatil, S.en_US
dc.date.accessioned2016-02-08T11:00:39Z
dc.date.available2016-02-08T11:00:39Z
dc.date.issued2014en_US
dc.departmentDepartment of Chemistryen_US
dc.description.abstractDiketopyrrolopyrrole (DPP)-based p-conjugated copolymers with thiophene have exceptionally high electron mobilities. This paper investigates electronic properties and charge carrier mobilities of selenophene containing analogues. Two new copolymers, with alternating thiophene DPP (TDPP) and selenophene DPP (SeDPP) units, were synthesized. Two side-chains, hexyl (Hex) and triethylene glycol (TEG) were employed, yielding polymers designated as PTDPPSeDPP-Hex and PTDPPSeDPP-TEG. Selenophene systems have smaller band gaps, with concomitant enhancement of the stability of the reduced state. For both polymers, ambipolar mobilities were observed in organic fieldeffect transistors (OFET). Grazing incidence X-ray diffraction (GIXD) data indicates preferential edge-on orientation of PTDPPSeDPP-TEG, which leads to superior charge transport properties of the TEG substituted polymer, as compared to its Hex analogue. Time-dependent-density functional theory (TDDFT) calculations corroborate the decrease in the optical band gap with the inclusion of selenophene. Ambipolar charge transport is rationalized by exceptionally wide conduction bands. DSCF calculations confirm the larger electron affinity, and therefore the greater stability, of the reduced form of the selenophene-containing DPP polymer in presence of chloroform.en_US
dc.identifier.doi10.1002/ijch.201400051en_US
dc.identifier.eissn1869-5868
dc.identifier.issn0021-2148
dc.identifier.urihttp://hdl.handle.net/11693/26495
dc.language.isoEnglishen_US
dc.publisherWiley-VCH Verlagen_US
dc.relation.isversionofhttp://dx.doi.org/10.1002/ijch.201400051en_US
dc.source.titleIsrael Journal of Chemistryen_US
dc.subjectBand gapen_US
dc.subjectCharge carrier injectionen_US
dc.subjectCopolymerizationen_US
dc.subjectDiketopyrrolopyrroleen_US
dc.subjectSelenopheneen_US
dc.titleSelenium in diketopyrrolopyrrole-based polymers: influence on electronic properties and charge carrier mobilitiesen_US
dc.typeArticleen_US
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