Journal
OPTICAL MATERIALS
Volume 88, Issue -, Pages 24-29Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optmat.2018.11.005
Keywords
Dye sensitized solar cells; Absorption spectra; Natural dyes; Eggplant; Nasunin; Thermal analysis
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Funding
- SAGRO project - Regione Siciliana (Assessorato Regionale Attivita' Produttive progetti PO FESR 2007/2013 linea d'intervento 4.1.1.1)
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This work reports an optical and photoelectrochemical study on the use of not edible parts of eggplant in a photovoltaic device. In this paper we employ, for the first time, the leaves and the bark of eggplant twigs, as pigment sources for dye-sensitized solar cells (DSSCs). We compared and discussed both the absorption spectra of two natural extracts and photovoltaic performances in DSSCs. We also compared, for a similar natural sensitizer, our electrolyte respect to several electrolytes reported in literature. Solar power conversion (eta = 1%) and the short circuit current density (Jsc = 8 mA/cm(2)) achieved by studied devices are higher of 27% and 110% respectively, than literature data, so far reported. Furthermore, we demonstrated, by a thermodynamic study, thermal stability up to 125 degrees C of the eggplant extract, when anchored to TiO2 layer, and finally we presented some stability tests, under solar irradiation, of the DSSCs based on this natural extract.
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