ISSN:
1573-9228
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract There remains no doubt today about the effect which the crystallographic structure of zinc sulfide, used for the preparation of electroluminophors, has on its optical and electrical-properties. A study of this effect is extraordinarily difficult, inasmuch as α-ZnS ⇋ β-ZnS phase transitions are accompanied by the formation of intermediate phases, with a variety of disorder patterns and of polytypes, which in turn affects the distribution and the buildup of glow centers. Available test data pertaining to the relation between electroluminescence characteristics and the structure of zinc sulfide are far from exhaustive and often contradictory. Thus, while the authors of [1] find the intensity of electroluminescence to be minimum within the regions of structural distortions, these regions becoming luminescent at higher voltages than regions with cubic or hexagonal structures, the authors of [2, 3] emphasize that a higher intensity of electroluminescence is due to defects responsible for the formation of glow centers and that it is in these regions where the activator atoms are mainly concentrated. In this study the authors have set out to trace the changes in α-ZnS and β-ZnS concentration during heat treatment, inasmuch as such a treatment affects all electroluminescence characteristics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00890217
Permalink