Light emitting device

A light emitting device, comprising:

• a light emitting diode configured to emit light;
• and
• a phosphor configured to change a wavelength of the light, the phosphor substantially covering at least a portion of the light emitting diode;
• wherein said phosphor comprises a compound including a host material, wherein divalent copper ions and oxygen are components of the host material,
• wherein the compound has the formula
• a(M′O).b(M″2O).c(M″X).d(Al2O3).e(M′″O).f(M″″2O3).g(M′″″oOp).h(M″″″xOy)
• wherein
• M′ is Cu, or a combination of Cu and Pb;
• M″ is Li, Na, K, Rb, Cs, Au, Ag or any combination thereof;
• M′″ is Be, Mg, Ca, Sr, Ba, Zn, Cd, Mn or any combination thereof;
• M″″ is Sc, B, Ga, In, or any combination thereof;
• M′″″ is Si, Ge, Ti, Zr, Mn, V, Nb, Ta, W, Mo, or any combination thereof;
• M″″″ is Bi, Sn, Sb, Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, or any combination thereof;
• X is F, Cl, Br, I, or any combination thereof;
• 0<a≦2;
• 0≦b≦2;
• 0≦c≦2;
• 0<d≦8;
• 0<e≦4;
• 0≦f≦3;
• 0≦g≦8;
• 0<h≦2;
• 1≦o≦2;
• 1≦p≦5;
• 1≦x≦2;
• and
• 1≦y≦5.