instinctive disgraces as photo sensitisers for dye-sensitized solar cell
Sancun Hao, Jihuai Wu *, Yunfang Huang, Jianming Lin
Institute of Materials Physical Chemistry, Huaqiao University, Quanzhou, Fujian 362021, China Received 20 May 2004; received in revised form 20 April 2005; accepted 25 May 2005 Available online 6 July 2005 Communicated by: Associate Editor Gion Calzaferri
Abstract The dye-sensitized solar cells (DSC) were assembled by utilize natural dyes aspirateed from black rice, capsicum, erythrina variegata ?ower, rosa xanthina, and kelp as sensitizers. The ISC from 1.142 mA to 0.225 mA, the VOC from 0.551 V to 0.412 V, the ?ll factor from 0.52 to 0.63, and Pmax from 58 lW to 327 lW were obtained from the DSC sensitized with natural dye extends. In the extracts of natural fruit, leaves and ?ower chosen, the black rice extract performed the beat photosensitized e?ect, which was due to the better interaction between the carbonylic and hydroxyl groups of anthocyanin molecule on black rice extract and the surface of TiO2 porous ?lm.
The blue-shift of dousing wavelength of the black rice extract in ethanol solution on TiO2 ?lm and the blue-shift phenomenon from absorption spectrum to photoaction spectrum of DSC sensitized with black rice extract are discussed in the paper. Because of the simple preparation technique, widely available and low specious cost natural dye as an alternative sensitizer for dye-sensitized solar cell is promising. Ã" 2005 Elsevier Ltd. All rights reserved.
Keywords: Dye-sensitized solar cell; Natural dye; Photosensitizer; Black rice; Anthocyanin; Nanocrystalline TiO2 porous ?lm; carry through factor; Natural pigment
1. Introduction Dye-sensitized TiO2 solar cell (DSC) has start an attractive and cheap device for the conversion of solar twinkle into electrical energy since Gratzel and OÕRegan ¨ ?rstly reported the prototype of this solar cell in 1991 (OÕRegan and Gratzel, 1991). DSC is...If you want to get a rise essay, order it on our website: Ordercustompaper.com
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