Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 11, Issue 1, Pages 254-267Publisher
MDPI
DOI: 10.3390/ijms11010254
Keywords
solar cells; betalaine; opuntia; red turnip; natural dyes; solar energy
Funding
- Polo Solare Organico Regione Lazio
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Dye-sensitized solar cells (DSSCs) were assembled by using the bougainvillea flowers, red turnip and the purple wild Sicilian prickly pear fruit juice extracts as natural sensitizers of TiO2 films. The yellow orange indicaxanthin and the red purple betacyanins are the main components in the cocktail of natural dyes obtained from these natural products. The best overall solar energy conversion efficiency of 1.7% was obtained, under AM 1.5 irradiation, with the red turnip extract, that showed a remarkable current density (Jsc = 9.5 mA/cm(2)) and a high IPCE value (65% at lambda = 470 nm). Also the purple extract of the wild Sicilian prickly pear fruit showed interesting performances, with a Jsc of 9.4 mA/cm(2), corresponding to a solar to electrical power conversion of 1.26%.
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