NARROW SPECTRAL LINE-WIDTH EMISSION PHOSPHORS WITH BROAD BAND EXCITATION EDGE UP TO AND INCLUDING THE BLUE WAVELENGTH REGION

摘要

Aspects of the present invention provide a family of phosphor compositions that may be used in the field of lighting applications. These phosphor compositions have crystal structures and chemical bond arrangements that enable broad band absorption and excitation using radiation up to and including the blue wavelength region. A preferred embodiment of the phosphor compositions has a general formula of (A_xA_y . . . A_z)_3-(1+q)m(W_1-rMo_r)O₆:Ln_m,D_qm, wherein x+y+ . . . +z=1; 0≦r≦1; 0≦q≦1; 0m≦0.12; and A=Divalent element from group IIA and/or IIB (e.g., Mg2+, Ca2+, Sr2+, Ba2+, Zn2+, etc.), W=tungsten with 6+ charge state, Mo=Molybdenum with 6+ charge state, Ln=Trivalent rare earth lanthanide element (e.g., Ce3+ to Lu3+), D=Monovalent element from group IA and/or IB (e.g., Li1+, Na1+, Cu1+, etc.), and O=Oxygen (O²⁻).