Polyiodide Formation and ION Transfer Facilitation in Gel Electrolyte for Dye Solar Cells
The objective of this work is to provide evidence of polyiodide formation from iodine/tri-iodide redox couple in dye sensitized solar cells. The polyiodides are detected using Raman spectroscopy and X-ray photoelectron spectroscopy(XPS). These intermediates facilitate ion transport in the electrolyte through Grothuss mechanism. The net effect on solar cell performance is increased photocurrent density, improved photovoltaic efficiency, and longer lifetime.
Index Terms - Dye Solar Cells, Gel Electrolyte, Photovoltaic Efficiency, Polyiodides.