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Title

APPLICATION OF GREEN WALNUT SHELL AS A NOVEL PIGMENT IN DSSC BASED ON TIO2 NANOPARTICLES

Writers

HOSSEIN PANAHI KAMBIZ | ABBASPOUR FARD MOHAMMAD HOSSEIN | FEIZY JAVAD | GOLZARIAN MAHMOOD REZA

Pages

 Start Page 727 | End Page 737

Keywords

TIO2 NANOPARTICLESQ1

Abstract

 Natural dye extract of walnut shell, has been extracted using an ultrasonic processor, purified through Hot saponification method, and studied as a novel sensitizing dye to fabricate TiO2 nanoparticles as based on Dye Sensitized Solar Cells (DSSC). The extract was characterized applying UV-Vis absorption spectroscopy and Fourier Transform Infra-Red (FTIR), employed to identify the anchoring groups in the walnut shell pigment. The typical current-voltage and the Incident Photon to Current EFFICIENCY (IPCE) curves were also prepared, and analysed for studying the PHOTOVOLTAIC properties. The walnut shell extract exhibited a short circuit current density (Jsc) of 0.939 mA/cm2, open-circuit voltage (Voc) of 0.792 V, Fill Factor (FF) of 0.71 and conversion EFFICIENCY of 0.528% under standard test conditions. These are fairly acceptable in comparison with the other similar cells. The improvement in EFFICIENCY is mainly due to the correct and proper extraction and purification methods and also due to the structure of walnut shell pigments that enhanced the charge transfer between the dye extract, and the TiO2 photo anode surface. However, such EFFICIENCY is still in need of a lot to be improved to compete with the existing cells. This shows the need for further extensive studies in this area of research.

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