Organic electroluminescence device and compound including nitrogen for organic electroluminescence device

An organic electroluminescence device, comprising:

• a first electrode;
• a hole transport region on the first electrode;
• an emission layer on the hole transport region;
• an electron transport region on the emission layer;
• and
• a second electrode on the electron transport region,
• wherein the emission layer comprises a compound including nitrogen represented by Formula 1:
• wherein in Formula 1,
• Q1 is NAr1, O or S,
• Ar1 is a hydrogen atom, a deuterium atom, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or a substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms for forming a ring,
• R1 and R2 are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted amino group, a substituted or unsubstituted silyl group, a substituted or unsubstituted boryl group, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted aralkyl group having 6 to 30 carbon atoms, a substituted or unsubstituted haloalkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted arylthio group having 6 to 30 carbon atoms, a substituted or unsubstituted phosphine oxy group, a substituted or unsubstituted phosphine sulfide group, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or a substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms for forming a ring, and R1 and R2 are each independently optionally combined with an adjacent group to form a ring,
• “a” and “b” are each independently an integer of 0 to 4,
• “n” is 0 or 1, and
• M1 and M2 are each independently represented by Formulae 2 or 3:
• wherein in Formulae 2 and 3,
• X1 to X6 are each independently CR3 or N,
• at least one of X1 to X4 is N,
• R3 is a hydrogen atom, a deuterium atom, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or a substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms for forming a ring, and R3 is optionally combined with an adjacent group to form a ring,
• W is O, NAr3, or CAr4Ar5,
• Ar2 to Ar5 are each independently a hydrogen atom, a deuterium atom, a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted aralkyl group, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms for forming a ring, or a substituted or unsubstituted heteroaryl group having 2 to 30 carbon atoms for forming a ring, and Ar2 to Ar5 are each independently optionally combined with an adjacent group to form a ring.