Optical and electrochemical properties of polyether derivatives of perylenediimides adsorbed on nanocrystalline metal oxide films

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dc.contributor.authorKus M.
dc.contributor.authorHakli O.
dc.contributor.authorZafer C.
dc.contributor.authorVarlikli C.
dc.contributor.authorDemic S.
dc.contributor.authorÖzçelik S.
dc.contributor.authorIcli S.
dc.date.accessioned2019-10-26T23:58:44Z
dc.date.available2019-10-26T23:58:44Z
dc.date.issued2008
dc.departmentEge Üniversitesien_US
dc.description.abstractWe report optical and electrochemical properties of polyether derivatives of perylenediimides (PDIs) thin films formed in various materials (semiconductor, insulator, amorphous and self-assembly). Perylenediimides adsorbed on nanocrystalline TiO2 (NT) nanocrystalline alumina (NA), amorphous silicon (PS) and neat self-assemblied (SA) films were prepared and characterized based on spectroscopic, electrochemical, spectro-electrochemical techniques. The absorption and fluorescence spectra of PDIs in chloroform exhibit vibronic features. The fluorescence quantum yields (?f) of PDIs with end amino substituents in chloroform solutions are over 0.95, while the quantum yield of triethoxyphenyl substituted PDI ?f value is 0.024 in solution. Optical spectroscopy proves that PDIs in metal oxide thin films form aggregated type complexes. An electrochromism, a color change from red to blue/violet, is observed on metal oxide films, that indicates existence of mono and dianion forms of PDIs. Reversibility of electrochemical reductions in NT film depends on the scanning rate. However, electrochromism in NA films is stable and reversibility is independent from scanning rate. Stable mono and diaionic species are formed on NA films. SA films show broad absorption peaks during the voltammetric scan. On the other hand, the first reduction onset potentials of PDIs are almost equal to the onset potential of capacitive current of TiO2 which lead to low efficiency in dye-sensitized solar cells. © 2008 Elsevier B.V. All rights reserved.en_US
dc.description.sponsorshipEuropean Commission: FP6 MOLYCELL project-SES-CT-2003-502783 NATO A-2en_US
dc.description.sponsorshipWe acknowledge partial funding by the European Commission (FP6 MOLYCELL project-SES-CT-2003-502783), Scientific and Technical Research Council of Turkey (TUBITAK, NATO A-2 support funds) and Alexander von Humbolt Foundation of Germany. We appreciate the project support funds of the State Planning Organization of Turkey (DPT). --en_US
dc.identifier.doi10.1016/j.orgel.2008.05.009
dc.identifier.endpage766en_US
dc.identifier.issn1566-1199
dc.identifier.issn1566-1199en_US
dc.identifier.issue5en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage757en_US
dc.identifier.urihttps://doi.org/10.1016/j.orgel.2008.05.009
dc.identifier.urihttps://hdl.handle.net/11454/21273
dc.identifier.volume9en_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevieren_US
dc.relation.ispartofOrganic Electronicsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectElectrochromismen_US
dc.subjectMetal oxide filmen_US
dc.subjectn-doping materialen_US
dc.subjectPerylenediimideen_US
dc.titleOptical and electrochemical properties of polyether derivatives of perylenediimides adsorbed on nanocrystalline metal oxide filmsen_US
dc.typeArticleen_US

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