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Vol. 27, Special Issue, May 2014, pp. 185-189




Study of Natural Dyes for Sensitized Solar Cells Applications

1 A. Torchani, 1,* R. Gharbi and 1 M. Fathallah

1 Laboratoire des semi-conducteurs et dispositifs électroniques. C3S. Ecole Supérieure des Sciences et Techniques de Tunis. University of Tunis 05 Av. Taha Hussein 1008 Montfleury, Tunis, Tunisia
Tel.: (216)71496066. fax: (216)71391166

* E-mail: rached.gharbi@esstt.rnu.tn


Received: 31 December 2012 /Accepted: 10 August 2013 /Published: 26 May 2014

Digital Sensors and Sensor Sysstems


Abstract: We have synthesized and used several natural dyes such as extracted from: Spinach, Beet, Henna, Strawberry, Red cabbage, and Mloukhia. The absorption of the extracted dyes diluted in ethanol or distilled water were measured using UV–Vis spectrophotometer. We have studied the topology of these films by scanning electron microscope (SEM), X-ray photoelectron spectroscopy (XPS) and x-ray diffraction (XRD) patterns of synthesized TiO2. The contents of Ti and O of synthesized TiO2 are 30 % and 50 % corresponding to closely Ti4+ state. The absorption of the TiO2 thin films immersed in these dyes was also measured in order to tune the change. The absorption in Beet and Red cabbage is more significant compared to other natural dyes.


Keywords: TiO2, Natural Dye, Absorbance, Dye sensitized solar cell, Semiconductor.


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