Author: Svein Espevik

Publisher:

Published: 1971

Total Pages: 206

ISBN-13:

Although chemically-deposited PbS layers have been extensively studied over the last twenty-five years, the mechanism of the photoconductivity process in such layers has not been previously understood in any reliable or complete manner. Investigation of the temperature dependence of the electrical conductivity, photoconductivity, Hall coefficient, photo-Hall effect, and thermoelectric power in such layers has been used to answer many of the common questions. Three types of layers have been investigated: (1) without added chemical oxidant in the deposition bath; (2) with a standard proportion of oxidant added; and (3) with four times the standard proportion of oxidant added. Electron microscope studies show that the layers consist of grains and intergranular regions. The author predicts on the basis of this work, that it should be possible in principle to prepare highly photosensitive PbS single crystal detectors.