Accession Number : AD0411383

Title :   MAXIMIZING THE PERFORMANCE OF PHOTOCONDUCTORS.

Descriptive Note : Final rept., 15 Sep 62-15 Mar 63,

Corporate Author : DAVID SARNOFF RESEARCH CENTER PRINCETON N J

Personal Author(s) : Anderson,W.M. ; Dreeben,A.B. ; Dresner,J. ; Mark,P.

Report Date : 30 APR 1963

Pagination or Media Count : 65

Abstract : 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 squared/v 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)

Descriptors :   (*HALL EFFECT, MEASUREMENT), (*SELENIUM, HALL EFFECT), PHOTOCONDUCTIVITY, X RAY DIFFRACTION, SCATTERING, ELEC, DRIFT, ELECTRON BEAMS, ELECTRONIC, ELECTROMETER, VACUUM APPARATUS, EVAPORATION, COPPER COMPOUNDS, CADMIUM COM, SULFIDES, CRYSTALS, IMPURITIES, PHO, CHEMICAL ANALYSIS, VALENCE, PHOTOELECTRIC EFFECT.

Distribution Statement : APPROVED FOR PUBLIC RELEASE