Energetic surface heterogeneity of nanocrystalline TiO2 films for dye-sensitized solar cells |
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| Authors: | Jae-Wook Lee Kyung-June Hwang Wang-Geun Shim Kyung-Hee Park Hal-Bon Gu Kyu-Hyuk Kwun |
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| Affiliation: | (1) Department of Chemical and Biochemical Engineering, Chosun University, Gwangju, 501-759, Korea;(2) Department of Environmental and Chemical Engineering, Seonam University, Namwon, 590-170, Korea;(3) Faculty of Applied Chemical Engineering, Chonnam National University, Gwangju, 500-757, Korea;(4) Department of Electric Engineering, Chonnam National University, Gwangju, 500-757, Korea |
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| Abstract: | Dye sensitized solar cells (DSSCs) have been receiving significant attention because they have many advantages compared to conventional organic solar cells. It has been known that the photovoltaic characteristics of DSSC are highly dependent on the adsorption properties of dyes on TiO2 films. To analyze the surface heterogeneity of TiO2 surfaces, single-phase anatase nanocrystallite titanium films were prepared by sol-gel method using the hydrolysis reaction of titanium tetraisopropoxide under acidic condition and characterized by XRD, FE-SEM and BET analysis. The adsorption energy distribution functions were calculated by the generalized nonlinear regularization method. It was found that the shape and the intensity of the adsorption energy distribution curve determined were highly related with the physical properties (i.e., geometrical heterogeneity) and chemical characteristics (i.e., energetic heterogeneity) of nanocrystalline TiO2 for DSSC. |
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| Keywords: | Adsorption Energy Distribution Functions Dye-sensitized Solar Cell TiO2 Film |
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