Electric lamp and discharge devices – With luminescent solid or liquid material – Solid-state type
Patent
1986-07-16
1988-06-14
Bashore, S. Leon
Electric lamp and discharge devices
With luminescent solid or liquid material
Solid-state type
313509, H01J 162, H01J 6304
Patent
active
047514272
ABSTRACT:
A highly efficient, AC-excited, blue light-emitting phosphor for solid-state thin-film electro-luminescent (TFEL) devices is comprised of strontium sulphide (SrS) host material doped with cerium fluoride (CeF.sub.3) acting as an emitter providing a source of photons. The blue SrS:CeF.sub.3 phosphor is about one hundred times brighter than the brightest zinc sulphide/thulium fluoride (ZnS:TmF.sub.3) blue phosphor heretofore known. To increase brightness level, at some loss of energy efficiency, electron-injection layers of zinc sulfide (ZnS) are placed on either side of the SrS:CeF.sub.3 layer in the TFEL device.
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Barrow William A.
Coovert Richard E.
King Christopher N.
Petersen Ronald O.
Bashore S. Leon
Boyer Michael K.
Planar Systems Inc.
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