Accession Number : AD0661191

Title :   DARK CONDUCTIVITY OF CDS AS A FUNCTION OF S-VAPOR PRESSURE DURING HEAT TREATMENT BETWEEN 500 AND 700 C.

Descriptive Note : Technical rept.,

Corporate Author : DELAWARE UNIV NEWARK DEPT OF PHYSICS

Personal Author(s) : Boer,K. W. ; Nalesnik,W. J.

Report Date : OCT 1967

Pagination or Media Count : 24

Abstract : The dark conductivity of CdS as a function of the sulfur vapor pressure is investigated during heat treatment in a temperature range 500 < T < 700C. The pressure dependence follows j equivalent to (p sub S) to the minus 1/m power with m = lx, l being the average number of sulfur atoms per molecule. For 500 < T < 525C, x = 3, for 525 < T < 630C, x = 1 and for 630 < T < 700C, x = 1. These results are explained by thermodynamic disorder and a Cd-rich nonstoichiometric equilibrium below 525C. Schottky-Wagner disorder most probably is dominant above 525C. The energy of doubly ionizing a sulfur vacancy is E sub c - E sub (V sub s) = 0.48 ev. (Author)

Descriptors :   (*CADMIUM SULFIDES, TRANSPORT PROPERTIES), HEAT TREATMENT, SULFUR, VAPOR PRESSURE, CRYSTAL DEFECTS, IONIZATION, CONDUCTIVITY

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE