| 主权项 |
1. An organic electroluminescent device comprising:
an anode; an emission layer; an anode-side hole transport layer between the anode and the emission layer, the anode-side hole transport layer comprising an anode-side hole transport material and an electron accepting material doped in the anode-side hole transport material; a middle hole transport layer between the anode-side hole transport layer and the emission layer, the middle hole transport layer comprising a middle hole transport material; and an emission layer-side hole transport layer between the middle hole transport layer and the emission layer, the emission layer-side hole transport layer being adjacent to the emission layer, wherein the emission layer-side hole transport layer comprises an emission layer-side hole transport material represented by Formula 1: wherein Ar1 to Ar5 are each independently selected from a substituted or unsubstituted aryl group having 6 to 50 carbon atoms for forming a ring and a substituted or unsubstituted heteroaryl group having 5 to 50 carbon atoms for forming a ring, m is an integer selected from 0 to 4, and n is an integer selected from 0 to 3, R1 is selected from hydrogen, deuterium, a substituted or unsubstituted aryl group having 6 to 50 carbon atoms for forming a ring, a substituted or unsubstituted heteroaryl group having 5 to 50 carbon atoms for forming a ring, and a substituted or unsubstituted alkyl group having 1 to 50 carbon atoms, and L1 is selected from a direct linkage, a substituted or unsubstituted arylene group having 6 to 18 carbon atoms for forming a ring, and a substituted or unsubstituted heteroarylene group having 5 to 15 carbon atoms for forming a ring. |
