High quantum yield white phosphors and methods of making
View Patent ↗Embodiments of the present disclosure include a composition comprising a Gd 3+ -Eu 3+ white phosphor composition, methods of making the composition, and the like.
1. A nearly white phosphor composition comprising: GdZrF 7 :Eu, wherein the phosphor is about 0.1% to 10% Eu molar equivalent doped GdZrF 7 .
2. The composition of claim 1 , wherein the quantum yield is about one.
3. The composition of claim 1 , wherein the phosphor is about 1% Eu molar equivalent doped GdZrF 7 .
4. The composition of claim 1 , further comprising a lanthanide selected from Tm, Tb, or Pr.
5. A method of making a phosphor comprising:
mixing in molar equivalents about 0.85 to 0.99 GdF 3 , about 1 to 1.12 ZrF 4 , about 0.005 to 0.075 Eu 2 O 3 , and about 0.5 to 3 NH 4 F;
grinding the mixture;
charging the mixture into a capped carbon crucible; and
heating the mixture at about 730 to 750° C. for about 1 to 3 h.
6. The method of claim 5 , further comprising:
placing the capped carbon crucible inside a larger carbon crucible;
placing the carbon crucibles in an alumina crucible; and
filling the space between the alumina and carbon crucibles with graphite powder.
7. The method of claim 5 , wherein the phosphor is about 0.1% to 10% Eu molar equivalent doped GdZrF 7 .
8. The method of claim 5 , wherein the phosphor is about 1% Eu molar equivalent doped GdZrF 7 .
9. The method of claim 5 , wherein the phosphor is GdZrF 7 :Eu.