{HEAD ~ The method} 1 wherein the P N junction is doped with {TAIL ~ more than one luminescent activator ion} 
{ HEAD ~ The method } 1 wherein the P N junction is doped with { TAIL ~ more than one luminescent activator ion }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL