Charge Transfer in Poly (3-Hexylthiophene) / Titanium Dioxide Inverse Opals: Effects of Surface Passivation and Donor Concentration

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dc.contributor.advisorChen, Jennifer I-Ling
dc.creatorKerr, Christopher Steven
dc.date.accessioned2019-07-02T16:08:12Z
dc.date.available2019-07-02T16:08:12Z
dc.date.copyright2018-04-03
dc.date.issued2019-07-02
dc.date.updated2019-07-02T16:08:12Z
dc.degree.disciplineChemistry
dc.degree.levelMaster's
dc.degree.nameMSc - Master of Science
dc.description.abstractHybrid photovoltaics are attractive because of their low cost and ability to be applied onto flexible substrates. However defect states can trap charges and are undesirable. We investigate TiO2 inverse opals treated with titanium tetrachloride (TiCl4) and subsequently coated with poly(3-hexylthiophene) (P3HT) to elucidate the effect of surface passivation on the photoinduced charge transfer and polaron dynamics. The chemical, physical and morphological properties were characterized using UV-vis spectroscopy, reflectance microscopy, X-ray diffraction, Raman spectroscopy and scanning electron microscopy. Passivation resulted in increased wall thickness of the inorganic framework and crystallite size. Photoinduced absorption spectroscopy showed enhanced polaron absorptions and reduced polaron lifetimes with increased titanium tetrachloride concentration and reduced concentration of the solution from which the P3HT is cast. The 3D structure presents an opportunity to study the charge transfer within a percolated network.
dc.identifier.urihttp://hdl.handle.net/10315/36240
dc.language.isoen
dc.rightsAuthor owns copyright, except where explicitly noted. Please contact the author directly with licensing requests.
dc.subjectChemistry
dc.subject.keywordsmaterials
dc.subject.keywordshybrid
dc.subject.keywordssolar cells
dc.subject.keywordstransient absorption spectroscopy
dc.subject.keywordsphotovoltaics
dc.subject.keywordsphotonics
dc.subject.keywordsorganic
dc.subject.keywordsinorganic
dc.subject.keywordscharge generation
dc.subject.keywordsphotoinduced absorption
dc.subject.keywordspolaron absorption
dc.subject.keywordslifetime
dc.subject.keywordspassivation
dc.subject.keywordstrap states
dc.subject.keywordsinverse opal
dc.subject.keywordscrystal
dc.subject.keywordsbulk heterojunction
dc.titleCharge Transfer in Poly (3-Hexylthiophene) / Titanium Dioxide Inverse Opals: Effects of Surface Passivation and Donor Concentration
dc.typeElectronic Thesis or Dissertation

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