Abstract
To decide how far the photodielectric effect (of 1. order) and the photoconductive effect (photodielectric effect of 2. order) participate in photocapacitive phenomena in zinc sulphide, the real and imaginary parts of the complex dielectric constant of a zinc sulphide single crystal have been investigated between 78°K and 298°K. A photoconductive effect at 298°K may be inferred from these measurements; whereas the results at 78°K are described as a photodielectric effect. Especially remarkable are the thermal emptying of the photodielectric charge at low temperature as well as the increase in capacity by a factor of about 30 when increasing the temperature from 78°K to 298°K. The capacity at 298°K shows a photocapacitive effect of 100% with strong dispersion in the frequency range of 60–300 000 cs.
Published Version
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