Green Nanochemistry Approach to Titanium Dioxide Nanoparticle, Dye- Sensitized Solar Cells
Final rept. 20 Jun 2010-19 Aug 2011
ARMY RESEARCH LAB ABERDEEN PROVING GROUND MD
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Dye-sensitized solar cells DSSCs are a class of thin-film solar cells which can be created using low-cost materials and natural dyes. They have the potential to achieve comparable efficiency to bulky silicon photovoltaic cells, while providing many other distinct advantages such as a more tunable band gap and device flexibility. In this research, anthocyanin, a natural dye extracted from various fruits, was used and tested as the photon harvestingelectron donating dye in titanium dioxide nanoparticle-based DSSCs. Anthocyanin molecules were extracted through mechanical pulverization and chemical extraction methods, with both being evaluated in a DSSC system. These results demonstrate that DSSCs made from chemically extracted blackberry-based anthocyanin cells produced almost 5 greater photocurrent density compared to DSSCs made through the mechanical pulverization method. The highest output was achieved with DSSCs created through the use of chemically extracted blueberry anthocyanin dyes, producing a photocurrent density, Isc, of 7.30 mA and an open circuit voltage, Voc, of 335 mV.
- Inorganic Chemistry
- Electric Power Production and Distribution