THE DETERMINATION OF THE FREQUENCY FACTOR AND THE TRAP DEPTH FROM THE TEMPERATURE DEPENDENCE OF THE ELECTROLUMINESCENCE OF ZnS PHOSPHORS (in German)
The temperature dependence of the a-c electroluminescence of ZnS- phosphors showed characteristic features which are closely related to the energetic distribution of traps. Measurements over a wide range of exciting field frequencies were used to determine frequency factors and trap depths with high accuracy. The order of magnitude of the obtained frequency factors agreed with theoretical values and results of other authors, who investigated CdS single crystals by different methods. The trap depths resulting from electroluminescence measurements were lower than those estimated from glow curves. This deviation can be explained by considering multiple retrapping and a low quantum efficiency of the thermoluminescence. An expression for the trap depth in dependence of the temperature of a glow maximum was derived, which is valid for all kinetics of thermoluminescence. (auth)
- Research Organization:
- Originating Research Org. not identified
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-17-037881
- OSTI ID:
- 4658746
- Journal Information:
- Z. Physik, Journal Name: Z. Physik Vol. Vol: 175
- Country of Publication:
- Country unknown/Code not available
- Language:
- German
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