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Conflict of Interest: In relation to this article, we declare that there is no conflict of interest.

Publication history: Received November 16, 2006
Accepted February 1, 2007

This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/bync/3.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Energetic surface heterogeneity of nanocrystalline TiO2 films for dye-sensitized solar cells

Jae-Wook Lee Kyung-Jun Hwang¹ Wang-Geun Shim² Kyung-Hee Park³ Hal-Bon Gu³ Kyu-Hyuk Kwun^†

Department of Chemical and Biochemical Engineering, Chosun University, Gwangju 501-759, Korea ¹Department of Environmental and Chemical Engineering, Seonam University, Namwon 590-170, Korea ²Faculty of Applied Chemical Engineering, Korea ³Department of Electric Engineering, Chonnam National University, Gwangju 500-757, Korea

khkwun@chosun.ac.kr

Korean Journal of Chemical Engineering, September 2007, 24(5), 847-850(4), 10.1007/s11814-007-0052-4

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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.

Keywords

Adsorption Energy Distribution Functions Dye-sensitized Solar Cell TiO2 Film

References

Gratzel M, J. Photochem. Photobiol. C, 4, 145 (2003)
Nazeeruddin MK, Humphry-Baker R, Liska P, Gratzel M, J. Phys. Chem. B, 107(34), 8981 (2003)
Ngamsinlapasathian S, Pavasupree S, Suzuki Y, Yoshikawa S, Sol. Energy Mater. Sol. Cells, 90, 3187 (2006)
Park NG, van de Lagemaat J, Frank AJ, J. Phys. Chem. B, 104(38), 8989 (2000)
Lee JW, Kwang HC, Shim WG, Kim C, Yang KS, Moon H, J. Nanosci. Nanotechnol., 6, 3577 (2006)
Rudzinski W, Everett DH, Adsorption of gases on heterogeneous surfaces, Academic Press, London (1992)
Jaroniec M, Madey R, Physical adsorption on heterogeneous solids, Elsevier, Amsterdam (1988)
Puziy AM, Matynia T, Gawdzik B, Poddubnaya OI, Langmuir, 15(18), 6016 (1999)
Frere M, Zinque M, Berlier K, Jadot R, Adsorption, 4, 239 (1998)
Szombathely MV, Brauer P, Jaroniec MJ, Comput. Chem., 13, 17 (1992)
Roth TM, Weese J, Honerkamp J, Comput. Phys. Commun., 139, 279 (2001)
Lee JW, Hwang KJ, Park DW, Park KH, Shim WG, Kim SC, J. Nanosci. Nanotechnol., (in print, 2007)
Shim WG, Kang HC, Kim C, Kim SC, Lee JW, Lee CJ, Moon H, J. Nanosci. Nanotechnol., 6, 3583 (2006)