Effect of side chain substituents on the electron injection abilities of unsymmetrical perylene diimide dyes

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dc.contributor.authorDinalp H.
dc.contributor.authorAkar Z.
dc.contributor.authorZafer C.
dc.contributor.authorLi S.
dc.date.accessioned2024-07-22T08:20:00Z
dc.date.available2024-07-22T08:20:00Z
dc.date.issued2011
dc.description.abstractThree near-infrared (NIR) absorbing unsymmetrical perylene diimide D-A-D type dyes containing 6-undecanoxy as donor group were utilized in dye-sensitized nanocrystalline TiO2 solar cells. Structure of the acceptor side of the molecules were improved by adding 4-[2-methyl-5-(cyanoacrylic acid)-3-thienyl]-phenyl (V), 3-carboxy-2-pyridil (VI) and 3-carboxy-2-pyrazyl (VII) moieties attached to one of the N-side of the dye. The relationship between the molecular structure of the acceptor sites of the dyes and the photovoltaic performances were discussed. Electrochemical measurements indicated that band gaps of the dyes were energetically favorable for electron injection from the excited state of the dyes to the conduction band of TiO2 nanoparticles. However, three dyes gave lower conversion efficiency on DSSC applications. Strong electron-withdrawing nature of perylene core might not permit to transfer the photo-generated electrons to the carboxyl groups anchoring to TiO2 surface, and then solar-to-electricity conversion efficiencies of the dyes were reduced. © 2011 Elsevier Ltd. All rights reserved.
dc.identifier.DOI-ID10.1016/j.dyepig.2011.03.022
dc.identifier.issn01437208
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/17951
dc.language.isoEnglish
dc.subjectCharge transfer
dc.subjectConversion efficiency
dc.subjectElectron injection
dc.subjectElectron mobility
dc.subjectExcited states
dc.subjectInfrared devices
dc.subjectIon exchange
dc.subjectSolar cells
dc.subjectSteel beams and girders
dc.subjectTitanium dioxide
dc.subject
dc.subjectNear Infrared
dc.subjectPerylenediimides
dc.subjectSolar spectrum
dc.subjectTiO
dc.subjectElectrons
dc.titleEffect of side chain substituents on the electron injection abilities of unsymmetrical perylene diimide dyes
dc.typeArticle

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