Photovoltaic Performance of Nanoporous TiO₂ Replicas Synthesized from Mesoporous Materials for Dye-Sensitized Solar Cells

Authors: Hwang, Kyung-Jun; Yoo, Seung-Joon; Kim, Sung-Soo; Kim, Ji-Man; Shim, Wang-Geun; Kim, Sun-Il; Lee, Jae-Wook

Source: Journal of Nanoscience and Nanotechnology, Volume 8, Number 10, October 2008 , pp. 4976-4981(6)

Publisher: American Scientific Publishers

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Abstract:

For dye-sensitized solar cell (DSSC), highly ordered nanoporous TiO₂ materials with crystalline frameworks were successfully synthesized from different silica templates including SBA-15, KIT-6 and MSU-H. A photoelectrode in DSSC was fabricated by adsorbing cis-bis(isothiocyanato)bis(2,2′-bipyridyl-4,4′-dicarboxylato)-ruthenium(II)bis-tetrabutylammonium dye (N719) onto the prepared TiO₂ nanoparticles. The samples were characterized by XRD, TEM, FE-SEM, AFM and Brunauer-Emmett-Teller (BET), and FT-IR analysis. An investigation of the influence of the bonding structure of N719 dye and nanoporous TiO₂ on the photovoltaic performance of DSSC revealed that the bonding structure of N719 on TiO₂ films is caused by the unidentate and bidentate linkage. Based on the overall conversion efficiency (ν), fill factor (FF), open-circuit voltage (V_OC) and short-circuit current (I_SC) from the I-V curves measured, it was observed that the photoelectric performance is strongly dependent on the dispersion properties of the nanoporous TiO₂ replicas from mesoporous silica templates.

Keywords: ADSORPTION; DYE-SENSITIZED SOLAR CELLS; N719 DYE; TIO2

Document Type: Research article

DOI: http://dx.doi.org/10.1166/jnn.2008.1199

Publication date: 2008-10-01

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