HIGH AMPLITUDE CURRENT AND OPTICAL TRANSMISSION OSCILLATIONS IN CDS SINGLE CRYSTALS.
DELAWARE UNIV NEWARK DEPT OF PHYSICS
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Low frequency current oscillations with current modulation of two orders of magnitude or more have been observed in CdS single crystal platelets under conditions of high electric field and illumination with monochromatic light near the fundamental absorption edge. The observed frequencies of oscillations were in the range from 0.1 to 5.0 cps, increasing with increasing light intensity and voltage. For most crystals the temperature of maximum photoconductivity occurred at approximately 130K. Oscillations for these crystals were observed only if the temperature without field was below 120K. Only certain kinds of crystals exhibited the above described oscillations. Besides the temperature dependence of the photoconductivity, these crystals show a pronounced thermally stimulated current conductivity glow-peak at 280K, and those which oscillate only at the lower temperature show another peak at 140K. Extracted
- Solid State Physics