Photo-thermo electric effect in Zn/orange dye aqueous solution/carbon cell
Keywords:Aqueous solution, conversion of light energy, electric power, electrochemical cell, orange dye, photothermo electric.
In this study, we have investigated the effect of heating by filament lamp on the electric properties of a Zn/orange dye aqueous solution/carbon cell. A solution of 5 wt.% orange dye (C17H17N5O2) in distilled water is used as an electrolyte in the cell. Zinc and carbon rods serve as electrodes. Organic glass box with a height, width and thickness of 35, 30 and 14 mm, respectively was used as a voltameter. The effect of heating by light on the open-circuit voltage and shortcircuit currents were studied. As the intensity of light was increased up to 380 Wm-2, the cells temperature increased from 36 oC to 60 oC. It was found that the open-circuit voltage of the cell was approximately constant with the increase of temperature, whereas short-circuit current and accordingly output power of the cell increased by 1.6 times. The Zn/
orange dye aqueous solution/carbon cell potentially can be considered as a small converter of light energy into electric power.
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