The light emitting device 1, wherein {HEAD ~ the semiconductor layer} is {TAIL ~ a GaN layer} 
is
The light emitting device 1 , wherein { HEAD ~ the semiconductor layer } is { TAIL ~ a GaN layer }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL