engleski

Naturaly dyes plant origin for solar cell application

The paper presents the application of natural dyes pant origin in the realization of modern solar cells. A dye sensitized solar cell (DSSC or Grätzel cell) is a low-cost solar cell belonging to the group of thin film solar cells. It is based on a semiconductor formed between a photo- sensitized anode and an electrolyte, a photoelectrochemical system. The DSSC has a number of attractive features: it is simple to make using conventional roll-printing techniques, is semi- flexible and semi-transparent which offers a variety of uses not applicable to glass-based systems, and most of the materials used are low- cost. Commercial applications, which were held up due to chemical stability problems, had been forecast in the European Union Photovoltaic Roadmap to significantly contribute to renewable electricity generation by 2020. Choice of natural dye for the sensitizer layer is an important factor to the performance of DSSC. Natural dyes offers a suitable alternative to high cost inorganic based DSSCs because of their simple production technique, affordable cost, complete biodegradation, easy availability, purity grade, environmental friendly, high reduction of noble metal, and chemical synthesis cost. The paper explains the principle of selective light adsorption of natural plant dyes, the influence of the dye molecule structure (chromophore) on the wavelength range of adsorption and light emission and the stability of the dye molecule to various external influences. This interdisciplinary approach can contribute to addressing some of the shortcomings of the DSSC.

dye-sensitized solar cell, natural dyes, selective light adsorption, chromophore structure

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