Photovoltaic devices based on nanocrystalline TiO2 and a fluorene-thiophene copolymer

Punniamooithy Ravirajan, Saif A. Haque, Dmitry Poplavskyy, James R. Durcant, Donal D.C. Bradley, Jenny Nelson

Research output: Chapter in Book/Report/Conference proceedingConference contribution


We report studies of charge recombination and photovoltaic device performance in structures consisting of a fluorene-bithiophene co-polymer and nanocrystalline TiO2. Efficient photoinduced charge transfer is observed using a TiO2 film of high interfacial area while charge recombination is remarkably slow (∼ms). The influences of thickness, surface morphology, top contact material, light intensity and ionization potential of the polymer are studied. Quantum efficiencies of over 11% and monochromatic power conversion efficiencies of around 1 % are achieved.
Original languageEnglish (US)
Title of host publicationProceedings of the 3rd World Conference on Photovoltaic Energy Conversion
StatePublished - Dec 1 2003
Externally publishedYes

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