Co-sensitized natural dyes potentially used to enhance light harvesting capability

R. Amelia; D. Sawitri; D. D. Risanti

doi:10.1117/12.2078268

9 January 2015 Co-sensitized natural dyes potentially used to enhance light harvesting capability

R. Amelia, D. Sawitri, D. D. Risanti

Proceedings Volume 9444, International Seminar on Photonics, Optics, and Its Applications (ISPhOA 2014); 94440O (2015) https://doi.org/10.1117/12.2078268
Event: International Seminar on Photonics, Optics, and Applications 2014, 2014, Sanur, Bali, Indonesia

Abstract

We present the photoelectrochemical properties of dye-sensitized solar cells using natural pigments containing anthocyanins, betalains, and caroteins. The dyes were adsorbed by a photoanode that was fabricated from nanocrystalline TiO₂ on transparent conductive glass. TiO₂ comprises of 100% anatase and 90:10 anatase:rutile fraction. The dyes extracted from mangosteen pericarp, Musa aromatica pericarp, Celosia cristata flower and red beet root were characterized through UV-vis and IPCE. The effectiveness of the dyes was explained through photocurrent as a function of incident light power. It was found that the cocktail and multilayered dyes comprised of anthocyanins and caroteins is beneficial to obtain high photocurrent, whereas betalains is not recommended to be applied on untreated TiO₂. Due to the bandgap properties of rutile and anatase, the presence of 10% rutile in TiO₂ is favourable to further enhance the electron transport.

Citation Download Citation

R. Amelia, D. Sawitri, and D. D. Risanti "Co-sensitized natural dyes potentially used to enhance light harvesting capability", Proc. SPIE 9444, International Seminar on Photonics, Optics, and Its Applications (ISPhOA 2014), 94440O (9 January 2015); https://doi.org/10.1117/12.2078268

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KEYWORDS

Titanium dioxide

Quantum efficiency

Dye sensitized solar cells

Absorbance

Absorption

Multilayers

Light harvesting

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