Impact of the different electron-releasing subunits on the dye-sensitized solar cell performance of new triphenylamine-benzimidazole based molecules

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dc.contributor.authorDinçalp H.
dc.contributor.authorSaltan G.M.
dc.contributor.authorAykut D.
dc.contributor.authorZafer C.
dc.date.accessioned2024-07-22T08:12:51Z
dc.date.available2024-07-22T08:12:51Z
dc.date.issued2015
dc.description.abstractNew triphenylamine-benzimidazole type small molecules with different electron-releasing groups were designed and synthesized to investigate their photovoltaic performances in dye sensitized solar cells (DSSCs). Their good visible absorptions covering the 400-535 nm in addition to suitable lowest unoccupied molecular orbital (LUMO) energy levels between -3.03 and -3.11 eV make good candidates them for DSSC devices. Fluorescence quenching studies of the dyes with pristine titania support the good electron injection to conduction band of TiO2. Time resolved measurements of the dyes in solutions indicate the occurence of charge generation during the excited state. One of the used dyes in DSSC devices, TPA5a, carrying a methoxy group in triphenylamine part of the structure, gave much higher power conversion efficiency (PCE) value of 4.31% as compared to the other derivatives. Device fabricated from TPA5a dye gives good external quantum efficiency (EQE) value above 70% at 460 nm. Also, electron impedance spectroscopy (EIS) analysis of the devices gives a good explanation of the understanding of the cell performances. © 2015 Elsevier B.V.
dc.identifier.DOI-ID10.1016/j.saa.2015.04.074
dc.identifier.issn13861425
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/16181
dc.language.isoEnglish
dc.publisherElsevier
dc.subjectCharge transfer
dc.subjectDyes
dc.subjectElectrons
dc.subjectEmission spectroscopy
dc.subjectExcited states
dc.subjectMolecular orbitals
dc.subjectMolecules
dc.subjectQuenching
dc.subjectSolar cells
dc.subjectSolar power generation
dc.subjectSynthesis (chemical)
dc.subjectBenzimidazoles
dc.subjectExternal quantum efficiency
dc.subjectImpedance analysis
dc.subjectLowest unoccupied molecular orbital
dc.subjectPower conversion efficiencies
dc.subjectTime resolved measurement
dc.subjectTime-resolved emission spectra
dc.subjectTriphenyl amines
dc.subjectDye-sensitized solar cells
dc.titleImpact of the different electron-releasing subunits on the dye-sensitized solar cell performance of new triphenylamine-benzimidazole based molecules
dc.typeArticle

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