Current Science

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Two natural dyes containing anthocyanin were extracted from sour and sweet pomegranate from Iran. Spectrophotometric evaluation of the natural dyes in solution and on a TiO2 substrate was 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. Dye-sensitized solar cells (DSSCs) were fabricated in order to determine the photovoltaic behaviour of each dye and the mixture of extracts. Such evaluations demonstrate conversion efficiencies of 0.73%, 1.57% and 0.91% for sour pomegranate, sweet pomegranate and mixed extract respectively. Natural dyes are suitable alternative photosensitizers for DSSCs.

Keywords

Anthocyanin, conversion efficiencies, dyesensitized solar cells, natural dye.
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