Electroluminescent phosphor
The electroluminescent phosphor of this invention is comprised of zinc sulfide activated with copper and iodine and may produce an emission with an x color coordinate from 0.145 to 0.155 and a y color coordinate from 0.085 to 0.095. The phosphor preferably contains from about 0.08 to about 0.90 weight percent (wt. %) copper.
1. An electroluminescent phosphor having an emission with an x color coordinate from 0.145 to 0.155 and a y color coordinate from 0.085 to 0.095, wherein the phosphor is comprised of zinc sulfide activated with copper and iodine.
2. The electroluminescent phosphor of claim 1 wherein the y color coordinate is from 0.090 to 0.095.
3. The phosphor of claim 1 wherein the phosphor contains from about 0.08 to about 0.9 weight percent copper.
4. The electroluminescent phosphor of claim 2 wherein the x color coordinate is from 0.150 to 0.155.
5. The phosphor of claim 4 wherein the phosphor contains from about 0.08 to about 0.9 weight percent copper.