MAXIMIZING THE PERFORMANCE OF PHOTOCONDUCTORS.
Final rept., 15 Sep 62-15 Mar 63,
DAVID SARNOFF RESEARCH CENTER PRINCETON N J
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Hall effect measurements for photogenerated car riers in vitreous Se showed that n-type photo conductivity predominates in illuminated layers, while current is carried mainly by holes in unexcited Se. The electron mobility is 0.32 plus or minus 0.1 cm squaredv s. The formation of precipitates of acceptor impurities in large CdS crystals has been demonstrated for concentra tions as low as 2 x 10 to the -2, the upper limit for the solubility of Cu in CdS. Cu and Ag sulfides exist as rods at low concentrations. At concentrations near 1, Cu forms large discs. Au segregates as hexagonal platelets of elemental Au. Inclusions have a particular orientation with respect to the C-axis of CdS. Author