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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 radic-chio have shown a monochromatic incident photon to current efficiency (IPCE) ranging from 40% to 69%. Short circuit photocurrent densities (J(sc)) up to 8.8 mA/cm(2), and open circuit voltage (V-oc) ranging from 316 to 419 mV, were obtained from these natural dyes under 100 mW/cm(2) (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. (C) 2012 Elsevier Ltd. All rights reserved.
Shaik Mohammed Zakeeruddin, Felix Thomas Eickemeyer, Lukas Pfeifer, Zhongjin Shen, Dan Ren, Wei Huang, Yunfei Jiao, Yi Ding
Michael Graetzel, Shaik Mohammed Zakeeruddin, Felix Thomas Eickemeyer, Zhongjin Shen, Naura Fakhira Antariksa