Efficient carbon-doped nanostructured TiO2 (anatase) film for photoelectrochemical solar cells |
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Authors: | Daobao Chu Ximei Yuan Guoxu Qin Mai Xu Peng Zheng Jia Lu Longwu Zha |
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Affiliation: | (1) College of Chemistry and Materials Science, Anhui Normal University, Wuhu, 241000, P.R. China;(2) Anhui Key Laboratory of Functional Molecular Solids, Wuhu, Anhui, 241000, P.R. China |
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Abstract: | In this paper, we have demonstrated that carbon-doped nanostructured TiO2 (CD ns-TiO2) films could be prepared simply and cheaply with oxalic acid and tetrabutylammonium bromide (Bu4N·Br) as the carbon sources. The surface morphology of the films was a multiple-porous network structure.The average size of nanoparticle was about 40 nm. Carbon doped into substitutional sites of TiO2 has also proven to be indispensable for band-gap narrowing and photovoltaic effect. Carbon doping lowered the band gap of n-TiO2 to 1.98, 1.64, and 1.26 eV. The CD ns-TiO2 film was first used as photoanode for solar cells, exhibiting high photocurrent densities (l.34 mA/cm2) and yielding an overall conversion efficiency (η) of 4.42 %. |
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Keywords: | Carbon-doped Titanium dioxide Solar cells Photovoltaic effect Sol– gel process Nanocomposites Energy conversion |
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