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05- International Journal of Thin Film Science and Technology
An International Journal


Volumes > Vol. 5 > No. 2


Dyes Extracted From the Seeds of Eruca Sativa, Nigella Sativa and Ammi Visnaga as Photosensitizers for Dye-Sensitized Solar Cells

PP: 91-96
Taher M. El-Agez, Hatem Ghamri, Amal Batniji, Wael A. Tabaza, Monzir S. Abdel-Latif, Sofyan A. Taya,
In this work, the extracts of three natural dyes obtained from the seeds of Eruca Sativa, Nigella sativa, and Ammi visnaga were used as photosensitizers for dye-sensitized solar cells (DSSCs). Dye Extraction was carried out before and after grinding the plant seeds. TiO2 nanopowder was used as a semiconducting material. The UV-Vis absorption spectra of the extracts of the seeds of Eruca Sativa, Nigella sativa, and Ammi visnaga in ethyl alcohol solution and the current-voltage characteristic curves of the fabricated DSSCs were measured. The energy gaps of the extracted dyes were estimated. The best response was obtained for the DSSC sensitized with Ammi visnaga with an efficiency of 0.107% before grinding the raw material and 0.132% after grinding. The acidic treatment of FTO glass sheets with HNO3 improved the efficiency by 123%, 108% and 105% for the three extracts of Eruca Sativa, Nigella sativa and Ammi visnaga, respectively.

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