Organic electroluminescence device

An organic electroluminescence device, comprising:

• an anode;
• a hole transport region provided on the anode;
• an emission layer provided on the hole transport region;
• an electron transport region provided on the emission layer;
• and
• a cathode provided on the electron transport region,
• wherein the emission layer includes a first compound represented by the following Formula 1 and a second compound represented by the following Formula 2:
• where L is selected from a substituted or unsubstituted arylene having 6 to 30 carbon atoms for forming a ring, or a substituted or unsubstituted heteroarylene having 4 to 30 carbon atoms for forming a ring,
• X is a divalent linker, and
• Ar1 and Ar2 are each independently represented by the following Formula 3:
• wherein Y is selected from O, S, NR3, CR4R5, or SiR6R7,
• R1 and R2 are each independently selected from a substituted or unsubstituted alkyl having 1 to 20 carbon atoms, a substituted or unsubstituted aryl having 6 to 30 carbon atoms for forming a ring, a substituted or unsubstituted heteroaryl having 4 to 30 carbon atoms for forming a ring, a substituted or unsubstituted alkoxy, a substituted or unsubstituted aryloxy, a substituted or unsubstituted amino, a substituted or unsubstituted cyano, a substituted or unsubstituted silyl, a halogen, deuterium, or hydrogen,
• R3, R4, R5, R6, and R7 are each independently selected from a substituted or unsubstituted alkyl having 1 to 20 carbon atoms, a substituted or unsubstituted aryl having 6 to 30 carbon atoms for forming a ring, or a substituted or unsubstituted heteroaryl having 4 to 30 carbon atoms for forming a ring,
• m is an integer of 0 to 3, and
• n is an integer of 0 to 4.