Licensable Technologies : Physics & Chemistry : Catalysts

Blue Light Emitting Thiogallate Phosphore

Abstract
In the design of thin film electroluminescent (TFEL) panels which are matrix addressed it has long been a desired object to produce a full color panel. Considerable progress has been made in the development of red and green phosphors for such multi-color electroluminescent displays. However, it has been difficult to produce a phosphor capable of emitting blue light of the required chromaticity and intensity, and yet remain chemically stable in the TFEL environment. This invention successfully overcomes this problem.  A crystalline blue emitting thiogallate phosphor of the formula RGa.sub.2 S.sub.4 :Ce.sub.x where R is selected from the group consisting of calcium, strontium, barium and zinc, and x is from about 1 to 10 atomic percent, the phosphor characterized as having a crystalline microstructure on the size order of from about 100 .ANG. to about 10,000 .ANG. is provided together with a process of preparing a crystalline blue emitting thiogallate phosphor by depositing on a substrate by CVD and resultant thin film electroluminescent devices including a layer of such deposited phosphor on an ordinary glass substrate.

IP Status: Available both Exclusively and Non Exclusively

Reference Number: 446

S Number: DOE reference no.(s): 87,249

Patents & Applications:
United States National Patent Number 5834053 Issued on 11/10/1998

Posted: 10-06-2004

Contact
John Russell
Technology Transfer Division
Los Alamos National Laboratory
P.O. Box 1663, MailStop C334
(505) 665-3941
jrussell@lanl.gov