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Quantum-splitting oxide-based phosphors and method of producing the same

United States Patent

September 2, 2003
View the Complete Patent at the US Patent & Trademark Office
Strontium, calcium, strontium calcium, strontium calcium magnesium, calcium magnesium aluminates, and strontium borates activated with Pr.sup.3+ exhibit characteristics of quantum-splitting phosphors under VUV excitation. A large emission peak at about 405 nm under VUV excitation is used conveniently to identify quantum-splitting phosphors. Improvements may be achieved with addition of fluorides or boric acid as a flux during the preparation of the phosphors. It is also possible to predict improvement in quantum efficiency by observing the ratio of emission intensities at about 480 nm and about 610 nm.
Setlur; Anant Achyut (Niskayuna, NY), Srivastava; Alok Mani (Niskayuna, NY)
General Electric Company (Niskayuna, NY)
09/ 681,670
May 18, 2001
FEDERAL RESEARCH STATEMENT This invention was first conceived or reduced to practice in the performance of work under a contract with the United States Department of Energy, said contract having the contract number of DE-FC26-99FT40632. The United States of America may have certain rights to this invention.