Emission Color Tuning of Green Emitting ZnS-Based CRT Phosphors
✍ Scribed by M. Bredol; J. Merikhi; I. Köhler; H. Bechtel; W. Czarnojan
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 299 KB
- Volume
- 110
- Category
- Article
- ISSN
- 0022-4596
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✦ Synopsis
(\mathrm{ZnS}: \mathrm{Cu}, \mathrm{Au}, \mathrm{Al} ; \mathrm{ZnS}: \mathrm{Cu}, \mathrm{Al}) and ((\mathrm{Zn}, \mathrm{Cd}) \mathrm{S}: \mathrm{Cu}, \mathrm{Al}) are the most important green emitting phosphors for cathode ray tube applications. The latter one contains (toxic) cadmium and therefore tends to be eliminated from tube production whenever possible. Alloying with CdS is applied to control the emission color over a very large range. This work shows how the emission color of the Cd-free phosphors can be tuned as well, at least over the region of interest for the green primary of color TV. Tuning mechanisms control the stoichiometry in the case of (\mathrm{ZnS}: \mathrm{Cu}, \mathrm{Au}, \mathrm{Al}) and proper adjustment of the doping levels in the case of (\mathrm{K} \mathrm{S} \mathrm{S}: \mathrm{Cu}, \Lambda). Relations for the emission color are given; possible microscopic mechanisms are discussed. O 1994 Academlc Press, inc.