Small biomolecule dopant retinals: Electron blocking layer in P3HT:PCBM type organic solar cells

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dc.contributor.authorKırmacı E.
dc.contributor.authorDinçalp H.
dc.contributor.authorSaltan G.M.
dc.contributor.authorKıran M.
dc.contributor.authorZafer C.
dc.date.accessioned2024-07-22T08:09:54Z
dc.date.available2024-07-22T08:09:54Z
dc.date.issued2018
dc.description.abstractWe present a comparative study of the photophysics and electron/hole properties of all-trans retinal-benzimidazole type molecules decorated with different electronic moieties (such as –OCH3, –N(CH3)2, –F, –CF3) in organic photovoltaic (OPV) devices in solution and on solid thin films. Steady-state spectra of synthesized dyes give large Stokes shifts (6887–13152 cm−1) in studied solvents. Decay times of these dyes were found to be substituent dependent giving a bi-exponential decay for fluorine containing retinals. Trans to cis photoisomerization rate constants of synthesized dyes were found to be about 3.3–16.4 × 10−6 s−1. Using a cyclic voltammetry measurements, HOMO and LUMO energy levels of fluorine-substituted dyes shift to lower values as compared to that of unfluorinated derivatives. We compared unusual electron blocking behavior of methoxy- and N,N-dimethylamino-substituted derivatives (Ret-I and Ret-II, respectively) in bulk heterojunction solar cells (BHJ-SCs) incorporating an active layer of P3HT:PCBM doped with Ret derivatives at various weight ratios. Hole mobility values for fluorine containing retinals were found to be about 1.0 × 10−4 and 7.1 × 10−4 cm2/V s for Ret-III and Ret-IV dyes, respectively. © 2017 Elsevier B.V.
dc.identifier.DOI-ID10.1016/j.synthmet.2017.11.012
dc.identifier.issn03796779
dc.identifier.urihttp://akademikarsiv.cbu.edu.tr:4000/handle/123456789/14982
dc.language.isoEnglish
dc.publisherElsevier Ltd
dc.subjectCyclic voltammetry
dc.subjectDoping (additives)
dc.subjectElectrons
dc.subjectFluorine
dc.subjectHeterojunctions
dc.subjectHole mobility
dc.subjectOphthalmology
dc.subjectOptoelectronic devices
dc.subjectOrganic solar cells
dc.subjectPhotoisomerization
dc.subjectRate constants
dc.subjectBulk heterojunction solar cells
dc.subjectElectron blocking
dc.subjectElectron blocking layer
dc.subjectOpto-electronic materials
dc.subjectOrganic photovoltaic devices
dc.subjectPhotovoltaic
dc.subjectRetinal
dc.subjectVoltammetry measurements
dc.subjectSolar cells
dc.titleSmall biomolecule dopant retinals: Electron blocking layer in P3HT:PCBM type organic solar cells
dc.typeArticle

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