DARK CONDUCTIVITY OF CDS AS A FUNCTION OF S-VAPOR PRESSURE DURING HEAT TREATMENT BETWEEN 500 AND 700 C.
DELAWARE UNIV NEWARK DEPT OF PHYSICS
Pagination or Media Count:
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 1m 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
- Solid State Physics