ELECTROCHEMICAL PHOTOVOLTAIC DETECTOR WITH PSEUDO-BINARY HgxCd1-xTe THIN FILM PHOTOELECTRODES
Materials Research Laboratory, Karmaveer Bhaurao Patil College, Vashi, Navi-Mumbai 400703, M. S., India.
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Electrochemical photo-voltaic detector with REDOX reactions occurring at the two electrodes was designed, fabricated and characterized through its characteristic properties. The photosensitive material used was HgxCd1-xTe (0 x 0.5) and sodium polysulphide electrolyte was used as a medium of charge transport from one electrode to another. The various designing and processing parameters were optimized to yield quality photo electrode material and the photo-voltaic detector cells were fabricated for each of these electrodes. The photo-voltaic detector performance was then tested through its current-voltage, capacitance-voltage, power output, spectral and photo response studies. The quantum conversion efficiency % and fill factor ff % are found to be enhanced from 0.24% to 0.55% and 30% to 49% respectively, when the composition parameter varied from zero to 0.1. The other performance parameters were also evaluated from their characteristic studies and in turn their variations are correlated with electrode materials composition. A best electrode composition is searched out from these studies.