Compositions – Inorganic luminescent compositions – Compositions containing halogen; e.g. – halides and oxyhalides
Patent
1997-03-27
1998-09-29
Bonner, Melissa
Compositions
Inorganic luminescent compositions
Compositions containing halogen; e.g., halides and oxyhalides
423117, 423518, C09K 1164, C09K 1156, C09K 1166, C09K 1155
Patent
active
058142452
ABSTRACT:
Blue, quantum-confined phosphors for field-emission displays made by reducing metal (M) sulfoaluminates at high temperature. This yields phases of the type M.sub.4 (AlO.sub.2).sub.6 S. Bulk sulfide contaminant mixed with the reduced sulfoaluminate phase is removed by treating it with a chelating agent in nonaqueous solution. A photometric cathodoluminescence efficiency of 9 lumen/watt at 1000 V for Sr.sub.3 PbS(AlO.sub.2).sub.6 is observed. Undoped Sr.sub.4 S(AlO).sub.6 displays 5 lumen/watt at 1000 V, with excellent blue chromatic saturation.
REFERENCES:
Chemical Abstract citation 118:51125, Brenchley et al., "Synthesis and Structure of Sulfide Aluminate Sodalites", J. Mater. Chem., vol. 2 (10), pp. 1003-1005, 1992.
Chemical Abstract citation 125:315072, Dann et al., "The Structure of Strontium Tellurite and Strontium Telluride Aluminate Sodalites Studied by Powder Neutron Diffraction, EXAFS, IR and MAS NMR Spectroscopies". J. Mater. Chem., vol. 6 (10), pp. 1717-21, 1996.
Brenchley et al., "Structure of Strontium Selenite and Strontium Selenide Aluminate Sodalities and the Relationship of Framework Structure to Vibrational Spectra in Aluminate Sodalites", Chem. Mater., vol. 5, pp. 970-973, Jul. 1993.
Blasse et al., "Luminescence of Zn4X and Cd4X Clusters (X=S,Se) in an Aluminate or Borate Cage", Chem. Phys. Lett., vol. 234, pp. 177-181, Mar. 3, 1995.
Phillips Mark L. F.
Shea Lauren E.
Bonner Melissa
Klavetter Elmer A.
Sandia Corporation
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