The evaluation of trapping parameters activation energy, frequency factor, electron's life time in traps, capture cross-section, kinetics order, etc. are the most important studies in the field of themoluminescence. The thermoluminescence (TL) properties of Pr and (Ag, Pr) doped ZnSe phosphors are studied at three uniform heating rates between the temperature of 130K and 370K after excitation by UV radiation (365 nm). Trapping parameters of these phosphors have been determined and its nature is discussed.
To understand the position of donor-acceptor level and nature of electronic state of activators and co-activators, the photo luminescence (PL) and electroluminescence (EL) emission spectra of Znse: Gd and Zn Se: (Ag, Gd) phosphors, have been recorded at room temperature. The method of preparation of phosphors is described. Voltage and frequency dependence of electroluminescent has also b been described. The light output varies as) been studied for a wide range of frequencies. It is observed that the EL emission spectra of these phosphors are shifted towards lower wavelength sides on increasing the field frequency.
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