{HEAD ~ An organic light emitting device} consists of a layered structure including a top multilayer stack, a bottom multilayer stack, a cavity layer between the top multilayer stack and the bottom multilayer stack, and {TAIL ~ an organic light emitting region} within the cavity layer 
{ HEAD ~ An organic light emitting device } consists of a layered structure including a top multilayer stack , a bottom multilayer stack , a cavity layer between the top multilayer stack and the bottom multilayer stack , and { TAIL ~ an organic light emitting region } within the cavity layer
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH