CHEMICAL-DEPOSITION OF CDSE THIN-FILMS - PHOTOELECTROCHEMICAL APPLICATIONS

A study has been undertaken to investigate the thin film and photoacti ve properties of chemically deposited CdSe thin films. The deposition has been carried out in an alkaline medium at 55 degrees C for 75 min. The electrical conductivity, activation energy of electrical conducti on, thermoelectric power and optical energy density have been measured . At room temperature, the electrical conductivity of the order of 10( -6) (ohm cm)(-1) and an optical energy gap of 1.74 eV with a direct ty pe of transition have been noticed. The thermoelectric power (TEP) mea surements show n-type conduction. A CdSe/sulphide-polysulphide/C elect rochemical cell has been constructed and its photoactive properties ha ve been studied. These characteristics have been analysed to determine the various performance parameters of a cell.