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dc.contributor.authorKuş, Mahmuten_US
dc.contributor.authorHaklı, Özgülen_US
dc.contributor.authorZafer, Ceylanen_US
dc.contributor.authorVarlıklı, Cananen_US
dc.contributor.authorDemiç, Şerafettinen_US
dc.contributor.authorÖzçelik, Serdaren_US
dc.contributor.authorİçli, Sıddıken_US
dc.date.accessioned2014-07-25T03:29:45Z
dc.date.available2014-07-25T03:29:45Z
dc.date.issued2013-10-08en_US
dc.identifier.citationKus, M., Hakli, Ö, Zafer, C., Varlikli, C., Demic, S., Özçelik, S., and Icli, S. (2008). Optical and electrochemical properties of polyether derivatives of perylenediimides adsorbed on nanocrystalline metal oxide films. Organic Elektronics, Volume 9(5), 757–766. doi:10.1016/j.orgel.2008.05.009en
dc.identifier.urihttp://dx.doi.org/10.1016/j.orgel.2008.05.009en_US
dc.identifier.urihttp://hdl.handle.net/11147/4113
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 (Uf) of PDIs with end amino substituents in chloroform solutions are over 0.95, while the quantum yield of triethoxyphenyl substituted PDIUfvalue 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 TiO2which lead to low efficiency in dye-sensitized solar cells.en
dc.language.isoengen_US
dc.publisherElsevieren_US
dc.relation.isversionof10.1016/j.orgel.2008.05.009en
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectPerylenediimideen
dc.subjectn-doping materialen
dc.subjectMetal oxide filmen
dc.subjectElectrochromismen
dc.titleOptical and electrochemical properties of polyether derivatives of perylenediimides adsorbed on nanocrystalline metal oxide filmsen
dc.typearticleen
dc.contributor.authorIDTR7497
dc.contributor.iztechauthorÖzçelik, Serdaren_US
dc.relation.journalOrganic Electronicsen_US
dc.contributor.departmentIzmir Institute of Technology. Chemistryen_US
dc.identifier.volume9
dc.identifier.issue5
dc.identifier.startpage757
dc.identifier.endpage766
dc.identifier.wosWOS:000259133500029
dc.identifier.scopusSCOPUS:2-s2.0-49049101656
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US


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