THE PROBLEM OF THE SATURATION OF THE LUMINESCENCE OF ZnS CRYSTALS

Journal Article · Fri Sep 01 04:00:00 EDT 1961 · Zeitschrift fuer Naturforschung (West Germany) Divided into Z. Nautrforsch., A, and Z. Naturforsch., B: Anorg. Chem., Org. Chem., Biochem., Biophys.,

OSTI ID:4803502

Broser, I; Klein, W

The intensities of various emission bands in ZnS single crystals were measured in dependence on the 60 kv electron beam density (10/sup -10/ up to 1 amp/cm/sup 2/) and the temperature (80 to 450 deg K). The linear luminescent characteristics at low electron beam densities change into some bands in a sublinear region, in which the luminescence increases with the root of the excitation intensity, and gradually become linear again. The sublinear region is displaced with increasing temperature to lower electron beam densities. At 10/ sup -1/ amp/cm/ and over, site heating by the electron beam plays a roll. This is shown in estimations of the temperature increase and temperature coefficient. If the temperature coefficient is negative, the warming is brought about in such a way that the luminescence increases more slowly or even with increasing excitation intensity decreases. The luminescence increases superlinearly with the excitation when the luminescence yield has a positive temperature coefficient. ln the crystals studied there was no real saturation of the luminescence. These results are in agreement with the Riehl-Schon model for the light mechanism in ZnS phosphors. The concept of saturation of light centers was not necessary. (tr-auth)

• Research Organization: Max-Planck-Gesellschaft, Berlin
• NSA Number: NSA-16-006873
• OSTI ID: 4803502
• Journal Information: Zeitschrift fuer Naturforschung (West Germany) Divided into Z. Nautrforsch., A, and Z. Naturforsch., B: Anorg. Chem., Org. Chem., Biochem., Biophys.,, Journal Name: Zeitschrift fuer Naturforschung (West Germany) Divided into Z. Nautrforsch., A, and Z. Naturforsch., B: Anorg. Chem., Org. Chem., Biochem., Biophys., Vol. Vol: 16a; ISSN ZNTFA
• Country of Publication: Country unknown/Code not available
• Language: German

Related Subjects

EFFICIENCY
ELECTRON BEAMS
ENERGY
ENERGY LEVELS
ENERGY RANGE
EXCITATION
KEV RANGE
LUMINESCENCE
MEASURED VALUES
MONOCRYSTALS
PHOSPHORS
PHYSICS
TEMPERATURE
ZINC SULFIDES