Patent ID: 7560749

Claim:
A light emitting material comprising: a base material; a material selected from the group consisting of copper fluoride, copper chloride, copper iodide, copper bromide, copper nitride, copper phosphide, silver fluoride, silver chloride, silver iodide, silver bromide, gold chloride, gold bromide, platinum chloride, and a combination thereof; and an impurity element, wherein the base material is a material selected from the group consisting of zinc sulfide, cadmium sulfide, calcium sulfide, yttrium sulfide, gallium sulfide, strontium sulfide, barium sulfide, zinc oxide, yttrium oxide, aluminum nitride, gallium nitride, indium nitride, zinc selenide, zinc telluride, strontium gallium sulfide, and a combination thereof, and wherein the impurity element is at least an element selected from the group consisting of lithium, sodium, potassium, rubidium, cesium, nitrogen, phosphorus, arsenic, antimony, and bismuth.