US 7,489,073 B2
Blue to yellow-orange emitting phosphor, and light source having such a phosphor
Tim Fiedler, München (Germany); Wolfram Hempel, Germering (Germany); and Frank Jermann, München (Germany)
Assigned to Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH, Munich (Germany)
Filed on Apr. 10, 2006, as Appl. No. 11/400,873.
Claims priority of application No. 10 2005 017 510 (DE), filed on Apr. 15, 2005.
Prior Publication US 2006/0232193 A1, Oct. 19, 2006
Int. Cl. H01J 1/62 (2006.01); H01J 63/04 (2006.01)
U.S. Cl. 313—503  [313/498; 313/501; 257/103; 445/23] 14 Claims
OG exemplary drawing
 
1. A blue to yellow-orange emitting phosphor from the class of the orthosilicates, which substantially has the composition AE2SiO4:D, wherein the phosphor has as component AE=Sr, Ba, Ca, or Mg, alone or in combination, the activating doping D consisting of Eu and a small proportion x of AEO contained therein being replaced by REN, where RE=rare earth, so as to achieve the stoichiometry AE2−x−aRExEuaSiO4−xNx.