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Influence of surface copper sulfide on the parameters of electroluminescent phosphors

Journal Article · · Inorg. Mater. (Engl. Transl.); (United States)
OSTI ID:5413251
Two series of specimens were studied with a copper concentration of 0.05 and 0.3 mass % which possessed electroluminescence (EL) with a spectral maximum in the regions of 460 and 510 nm, respectively. Radical-recombination luminescence (RRL) was excited by atomic hydrogen obtained in an rf discharge. The RRL spectra were recorded automatically by a spectrophotometer. When the standard technique is used to wash an electroluminescent phosphor based on ZnS the copper sulfide is not completely removed from its grains. It is necessary to have objective monitoring of the degree to which surface copper sulfide is washed off the phosphor, on the basis of the intensity of the radical-recombination luminescence. The aging rate of the EL phosphor can be described by stabilization of the second phase (copper sulfide) or by replacement of this phase by a more stable compound.
Research Organization:
All-Union Scientific-Research Institute of Phosphors and Ultrapure Substances
OSTI ID:
5413251
Journal Information:
Inorg. Mater. (Engl. Transl.); (United States), Journal Name: Inorg. Mater. (Engl. Transl.); (United States) Vol. 21:10; ISSN INOMA
Country of Publication:
United States
Language:
English