Abstract :
We present the photoelectrochemical properties of dye-sensitized solar cells using natural pigments containing betalains and anthocyanins
as sensitizers. The dyes extracted from grape, mulberry, blackberry, red Sicilian orange, Sicilian prickly pear, eggplant and radicchio
have shown a monochromatic incident photon to current efficiency (IPCE) ranging from 40% to 69%. Short circuit photocurrent
densities (Jsc) up to 8.8 mA/cm2, and open circuit voltage (Voc) ranging from 316 to 419 mV, were obtained from these natural dyes
under 100 mW/cm2 (AM 1.5) simulated sunlight. The best solar conversion efficiency of 2.06% was achieved with Sicilian prickly pear
fruits extract. The influence of pH and co-absorbers on natural sensitizers, were investigated and discussed.
2012 Elsevier Ltd. All rights reserved.
