In {TAIL ~ a preferred embodiment}, the p type zinc oxide film contains {HEAD ~ arsenic} and is grown on a gallium arsenide substrate 
In { TAIL ~ a preferred embodiment } , the p type zinc oxide film contains { HEAD ~ arsenic } and is grown on a gallium arsenide substrate
OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH