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AuthorCremer, Jensdc.contributor.author
Date of accession2016-03-14T13:39:09Zdc.date.accessioned
Available in OPARU since2016-03-14T13:39:09Zdc.date.available
Year of creation2005dc.date.created
AbstractThis thesis contributes to the field of organic solar cells and elucidates novel concepts to increase the power conversion efficiency of this type of photovoltaic device. A main objective of this thesis has been the synthesis and characterization of new dye-derivatized head-to-tail coupled oligo(3-hexylthiophene)s which combine the outstanding hole charge carrier mobilities of the oligothiophene units and the possibility to absorb light in the low energy part of the terrestrial sun spectrum due to the covalently attached dyes. Furthermore, in order to manufacture cost effective organic solar cells it is desirable to substitute the expensive fullerene derivatives in bulk-heterojunction solar cells which in turn makes these novel donor-acceptor materials even more promising candidates due to their inherent property of photoinduced electron transfer. Another goal of this thesis has been the synthesis of novel derivatives of poly(3-hexylthiophene)s which can be employed in heterojunction solar cells consisting of polymer-fullerene blends as the photoactive layers. The incorporation of ethynylene moieties into the polymer backbone significantly lowers the energetic levels of the HOMO by 0.3 eV, resulting in an optimized overlap with the corresponding frontier orbitals of the fullerene acceptor. Furthermore, a new class of compounds based on oligothiophene-derivatized azobenzenes has been synthesized as light switchable molecules which by the application of light at appropriate wavelengths can be interconverted from the trans- to the cis-form and vice versa, making them promising candidates for the construction of self-assembled light-switchable monolayers. In the final chapter of this thesis, new hexabenzocoronene derivatives are disclosed which combine the p-type semiconducting properties of oligo(3-hexylthiophene)s and the capability of hexabenzocoronenes to form self-assembled columnar phases.dc.description.abstract
Languageendc.language.iso
PublisherUniversität Ulmdc.publisher
LicenseStandard (Fassung vom 03.05.2003)dc.rights
Link to license texthttps://oparu.uni-ulm.de/xmlui/license_v1dc.rights.uri
KeywordAzobenzenedc.subject
KeywordDonor-acceptor systemdc.subject
KeywordHexabenzocoronenedc.subject
KeywordOrganic solar celldc.subject
KeywordPoly(3-hexylthiophene)dc.subject
LCSHDye-sensitized solar cellsdc.subject.lcsh
TitleNovel head-to-tail coupled oligo(3-hexylthiophene) derivatives for photovoltaic applicationsdc.title
Resource typeDissertationdc.type
DOIhttp://dx.doi.org/10.18725/OPARU-421dc.identifier.doi
URNhttp://nbn-resolving.de/urn:nbn:de:bsz:289-vts-52701dc.identifier.urn
GNDOligothiophenedc.subject.gnd
GNDPerylendc.subject.gnd
FacultyFakultät für Naturwissenschaftenuulm.affiliationGeneral
Date of activation2005-08-16T15:58:44Zuulm.freischaltungVTS
Peer reviewneinuulm.peerReview
Shelfmark print versionZ: J-H 10.736 ; W: W-H 8.692uulm.shelfmark
DCMI TypeTextuulm.typeDCMI
VTS ID5270uulm.vtsID
CategoryPublikationenuulm.category
Bibliographyuulmuulm.bibliographie


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