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Poonam Bandyopadhyay,Anindita Dey,Ruma Basu,Sukhen Das,Papiya Nandy 한국물리학회 2014 Current Applied Physics Vol.14 No.8
Solar cells, in general, perform under light source of solar influx, while the heat energy of solar radiation remains unutilized. Using an aqueous suspension of copper doped zinc oxide nanoparticles in speciallydesigned electrochemical cells we have observed significant voltage (maximum 632.0 mV) and storage duration (~47 h) upon thermal excitation. The cells exhibit reasonable energy conversion efficiency (maximum 1.36%). These cells generate voltage even at room temperature (~30 C) and the voltage increases gradually with increasing temperature. When the platinum foil separating the two compartments of the electrochemical cell is replaced by a planar lipid membrane, all the parameters e.g., thermovoltage, storage capacity and the energy conversion efficiency increase significantly.