An organic light {HEAD ~ emitting device} having an anode, {TAIL ~ a cathode} and an organic layer between the anode and the cathode is provided 
having
An organic light { HEAD ~ emitting device } having an anode , { TAIL ~ a cathode } and an organic layer between the anode and the cathode is provided
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH