Accession Number : AD0673836

Title :   STUDIES IN ZINC OXIDE PHOTOCONDUCTIVITY.

Descriptive Note : Final technical rept.,

Corporate Author : GULF GENERAL ATOMIC INC SAN DIEGO CALIF

Personal Author(s) : Saltsburg,Howard

Report Date : AUG 1968

Pagination or Media Count : 46

Abstract : A study of the gas evolved (or adsorbed) from an electrophotographic ZnO (ZZZ-661), a spectroscopically pure ZnO (SP-500), and a commercial Electrofax paper when irridated by ultraviolet (UV) has been carried out using gas chromatographic techniques. Some studies of the photoconductivity of ZnO were also carried out using ac conductivity techniques. On the ZnO samples studied, O2 desorption was never observed, but only adsorption. Further, on ZnO ZZZ-661, in addition to O2 adsorption, CO2 was produced. No CO2 was observed on either the SP-500 or the paper samples. The origin of the CO2 appears to be a carbonaceous impurity, probably present in the ZZZ-661 as a carbon-oxygen complex. The electrical conductivity studies were not readily interpretable because they did not conform to the simple Debye model involving bulk and surface regions of differing conductivity. Actual printing experiments showed that, as found by others, O2 was necessary to cause charging. Ozone was not effective in charging the electrophotographic paper for printing. (Author)

Descriptors :   (*ELECTROPHOTOGRAPHY, MATERIALS), (*ZINC COMPOUNDS, *PHOTOCONDUCTIVITY), ULTRAVIOLET RADIATION, DEGASIFICATION, OXYGEN, CARBON DIOXIDE, OZONE, GAS CHROMATOGRAPHY, ADSORPTION, SURFACE PROPERTIES

Subject Categories : Photography

Distribution Statement : APPROVED FOR PUBLIC RELEASE