Natural dyes extracted from black carrot and bramble for Dye-Sensitized Solar Cells

Journal: Vol.8, No.2, Spring 2015 - Article 6   Pages :  153 Until 158

Article Code:

M. Hosseinnezhad: Institute of Color Science and Technology - Department for Organic Colorants
S. Moradian: Amirkabir University of Technology - Faculty of Polymer and Color Engineering
K. Gharanjig: Institute for Color Science and Technology - Department of Organic Colorants

Article's abstract:

Two different natural dyes containing anthocyanin extracted from black carrot and bramble from Iran. Spectrophotometric evaluations of the natural dyes in solution and on a TiO2 substrate were carried out in order to assess changes in the status of the natural dyes. The results show that the natural dyes indicate buthochromic shift on the TiO2 substrates. The chemical adsorption of natural dyes present at the surface of TiO2 substrate that their chemical binding can be increased by the chelating effect to the TiIV ions. Finally, dye sensitized solar cells were fabricated in order to determine the photovoltaic behaviour and conversion efficiencies of each dyes and mixture of extracts. Such evaluations demonstrate conversion efficiencies of 0.33, 0.69 and 0.47 for black carrot, bramble and mixed extract, respectively. Natural dyes are suitable alternative photosensitizers for dye-sensitized solar cells due to simple preparation method, low cost, environmentally friendly and widely available

Natural dyes; Dye-sensitized solar cells; Photosensitizer; Conversion efficiencies; Anthocyanin.

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Prof. Zahra Ranjbar
Dr. Farahnaz Nourmohammadian
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Dr. Mozhgan Hosseinnezhad
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Institute for Color Science and Technology (ICST)

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