Phosphors

Details Phosphors Phosphors

1983-03-10

1984-04-10

Smith, John D.

Electric lamp and discharge devices

With luminescent solid or liquid material

Solid-state type

2523014S, 2523016S, 313506, 313509, 427 12, 427 64, 427 66, 427157, 445 5, 445 26, H05B 3310, H05B 3314

Patent

active

044423772

ABSTRACT:
This invention provides phosphors for use in electroluminescent devices. Each phosphor contains a dopant, selected from the group consisting of europium, erbium, and terbium and at least one of the sulphides selected from the group consisting of strontium and calcium sulphide.

REFERENCES:
patent: 3731353 (1973-05-01), Vecht
patent: 3984586 (1976-10-01), Kawarada
patent: 4140937 (1979-02-01), Vecht
patent: 4365184 (1982-12-01), Higton
"Masoorkar et al., "Voltage & Frequency Dependence of Brightness in SRS: Cu Electroluminophors" Indian J. of Pure and Applied Physics, Sep. 11, 1973, pp. 688-690.
S. Larach et al., "Luminescence from Erbium-Activated Group II-VI Compounds Containing, Alkali Metal Compensators" RCA Laboratories, Princeton, N.J., vol. 116, No. 4, Apr. 1969 J. Electrochem Soc.: Solid State Science, pp. 471-474.
M. S. Waite et al., "Direct-Current Electroluminescence in Rare-Earth-Activated Zinc Sulphide Powder Layers", Applied Physics Letters, vol. 19, No. 11, Dec. 1, 1971, pp. 471-473.
A. Wachtel., "CaS:Cu,EU Electroluminescent Phosphors", Journal of the Electrochemical Society, Mar. 1960, pp. 199-206.
W. Lehmann, "Activators and Co-Activators in Calcium Sulfide Phosphors", Journal of Luminescence 5(1972) pp. 87-107.
W. Lehmann et al.--"Cathodoluminescence of CaS:Ce.sup.3+ and CaS:EU.sup.2+ Phosphors" J. Electrochem. Soc.: Solid State Science (Mar. 1971) pp. 477-482.
Rastogi et al.--"Electroluminescence of CaS:Nd: Cu Phosphors", Indian J. Pure Appl. Phys., vol. 14 (Mar. 1976) pp. 187-189.

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