{TAIL ~ an organic layer} formed on the first electrode, the organic layer including {HEAD ~ at least an organic light} emitting layer; and 
{ TAIL ~ an organic layer } formed on the first electrode , the organic layer including { HEAD ~ at least an organic light } emitting layer ; and
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH