{HEAD ~ The compositions} may be in {TAIL ~ optoelectronic devices} including photodiodes, visible spectrum photodetectors, and photovoltaic devices  
in
{ HEAD ~ The compositions } may be in { TAIL ~ optoelectronic devices } including photodiodes , visible spectrum photodetectors , and photovoltaic devices
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH