Showing papers by "Prashant V. Kamat published in 1979"
TL;DR: In this paper, the performance of photoelectrochemical cells made of an n-type TiO2 photoanode and the O2/OH− redox electrolyte system have been studied at different temperatures.
Abstract: The performance of photoelectrochemical cells made of an n‐type TiO2 photoanode and the O2/OH− redox electrolyte system have been studied at different temperatures. It has been found that when only the photoanode compartment is heated, the open‐circuit voltage decreases (∼2.0 mV K−1) and the short‐circuit current increases (∼0.8 mA m−2 K−1); however, the power output shows a small increase and a fall thereafter. The behavior is similar to that of Schottky‐barrier solar cells. When both of the electrode compartments are heated, the power output increases with increasing temperature (∼0.4 mW m−2 K−1) and this can be attributed to the enhancement of the rate of the electrochemical reaction at the counterelectrode.
8 citations
01 Sep 1979
TL;DR: In this article, the authors carried out a detailed investigation of these cells with a view to understanding the factors influencing their photopotentials, and found that the principal drawback of Fev'
Abstract: THE study of electrochemical cells based on redox reactions of a photo-excited dye in solution or a semiconductor surface in contact with an electrolyte is of great current importance in view of the possibility of applying such reactions for the direct conversion of sunlight into electrical energy. One such system employing thionine as the light sensitive dye and ferrous ion as the reducing agent in acidic medium has been. the subject of many investigations>", The principal drawback of'Fev'
3 citations
01 Sep 1979
TL;DR: In this paper, the maximum power output and the internal resistance of homogeneous and heterogeneous type ferrous-thionine photogalvanic cells have been measured and the influence of various redox couples in the counter halfcell (cathode compartment) and their concentrations have been investigated.
Abstract: The maximum power output and the internal resistance of homogeneous and heterogeneous type ferrous-thionine photogalvanic cells have been measured. In the latter case the influence of various redox couples in the counter halfcell (cathode compartment) and their concentrations have been investigated. It is found that the presence of high concentration of a strong oxidant markedly increases the power output by facilitating the flow of electrons from the photoanode compartment to the dark cathode. Effect of agitation of the cell contents reveals that concentration polarisation near the electrodes is also a factor responsible for lowering the power output.
1 citations