OPTICAL BAND GAP EXCITATION AND PHOTOELECTRON GENERATION IN TITANIUM DIOXIDE-BASED SOLID STATE SOLAR CELLS

M. Rusop (), T. Shirata, T. Soga and T. Jimbo
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M. Rusop: Department of Environmental Technology and Urban Planning, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
T. Shirata: Department of Environmental Technology and Urban Planning, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
T. Soga: Department of Environmental Technology and Urban Planning, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan
T. Jimbo: Department of Environmental Technology and Urban Planning, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan

Surface Review and Letters (SRL), 2005, vol. 12, issue 05n06, 681-689

Abstract: The properties and optical band gap excitation of nanoporous titanium dioxide(TiO2)and transparent semiconducting copper iodide(CuI)films prepared by aXeClexcimer laser were investigated. TheCuIfilms exhibited optical transmittance over 80% in the wavelength range from 400 to 900 nm with minimum resistivity of about 2 KΩcm. The optical absorption of these films showed a remarkable blue shift compared to that of polycrystalline ofCuI, which can be explained from the formation of ultra fine ofCuIgrains. The properties of pulsed laser depositedCuIandTiO2in power output ofp-CuI|dye|n-TiO2cells were studied. The photoelectron generation and mechanism in fabricatedp-CuI|dye|n-TiO2cells were also studied. An efficient charge generation was observed through the illumination of theTiO2layer of the fabricatedp-CuI|dye|n-TiO2cells. The band gap excitation ofTiO2was observed only under illumination throughTiO2layer. The adsorbed dye molecules to theTiO2surface act as a relay, especially under illumination throughTiO2layer in the wave range region of 300–400 nm.

Keywords: CuI; TiO2; transparent semiconductor; band gap excitation; charge generation; solar cell; XeClexcimer laser (search for similar items in EconPapers)
Date: 2005
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DOI: 10.1142/S0218625X05007694

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