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