Title :
Photovoltaic devices based on nanocrystalline TiO/sub 2/ and a fluorene-thiophene copolymer
Author :
Ravirajan, Punniamoorthy ; Haque, SaifA ; Poplavskyy, Dmitry ; Durrant, James R. ; Bradley, D.D.C. ; Nelson, Jenny
Author_Institution :
Dept. of Phys., Univ. of Jaffna, Sri Lanka
Abstract :
We report studies of charge recombination and photovoltaic device performance in structures consisting of a fluorene-bithiophene co-polymer and nanocrystalline TiO/sub 2/. Efficient photoinduced charge transfer is observed using a TiO/sub 2/ film of high interfacial area while charge recombination is remarkably slow (/spl sim/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.
Keywords :
charge injection; filled polymers; ionisation potential; nanoporous materials; photoconductivity; photovoltaic cells; photovoltaic effects; polymer blends; polymer films; surface morphology; surface treatment; titanium compounds; visible spectra; TiO/sub 2/; charge recombination; fluorene-thiophene copolymer; interfacial area; ionization potential; light intensity; monochromatic power conversion efficiency; nanocrystalline TiO/sub 2/; photoinduced charge transfer; photovoltaic devices; quantum efficiency; surface morphology; thickness influence; top contact material;
Conference_Titel :
Photovoltaic Energy Conversion, 2003. Proceedings of 3rd World Conference on
Conference_Location :
Osaka, Japan
Print_ISBN :
4-9901816-0-3
