Composition for organic electroluminescent device, organic electroluminescent device including the same, and boron compound

A boron compound represented by Formula 1:

• wherein, in Formula 1,
• R11, R12, R13, R14, R21, R22, R23, R24, R31, R32, R33, R34, R41, R42, R51, R52, R53, R54, R55, and R6 are each independently a hydrogen atom, a cyano group, a halogen atom, a deuterium atom, a substituted or unsubstituted aryl group, a substituted or unsubstituted heteroaryl group, a substituted or unsubstituted diarylamino group, a substituted or unsubstituted diheteroarylamino group, a substituted or unsubstituted arylheteroarylamino group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted heteroaryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted heteroarylthio group, or a linker,
• each Ar is independently a substituted or unsubstituted benzene ring, or a substituted or unsubstituted heteroaromatic ring having 5 or 6 ring-forming atoms, wherein Ar optionally comprises a linker,
• m is an integer from 0 to 4, n is an integer from 1 to 5, and a sum of m and n is 5,
• the linker is a single bond or a linking group, and
• ring 3 and ring 6 are not bonded together via the linker, ring 3 and Ar are not bonded together via the linker, ring 4 and ring 6 are not bonded together via the linker, and ring 4 and Ar are not bonded together via the linker.

An organic electroluminescent device comprising:

• a first electrode;
• a second electrode;
• an organic layer arranged between the first electrode and the second electrode,
• wherein the organic layer comprises an emission layer;
• and
• wherein the organic layer further comprises a composition, the composition comprising a boron compound represented by Formula 1 and a phosphorescent material,
• wherein, in Formula 1,
• R11, R12, R13, R14, R21, R22, R23, R24, R31, R32, R33, R34, R41, R42, R51, R52, R53, R54, R55, and R6 are each independently a hydrogen atom, a cyano group, a halogen atom, a deuterium atom, a substituted or unsubstituted aryl group, a substituted or unsubstituted heteroaryl group, a substituted or unsubstituted diarylamino group, a substituted or unsubstituted diheteroarylamino group, a substituted or unsubstituted arylheteroarylamino group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted heteroaryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted heteroarylthio group, or a linker,
• each Ar is independently a substituted or unsubstituted benzene ring, or a substituted or unsubstituted heteroaromatic ring having 5 or 6 ring-forming atoms, wherein Ar optionally comprises a linker,
• m is an integer from 0 to 4, n is an integer from 1 to 5, and a sum of m and n is 5,
• the linker is a single bond or a linking group, and
• ring 3 and ring 6 are not bonded together via the linker, ring 3 and Ar are not bonded together via the linker, ring 4 and ring 6 are not bonded together via the linker, and ring 4 and Ar are not bonded together via the linker.

An electronic apparatus comprising an organic electroluminescent device, the organic electroluminescent device comprising:

• a first electrode;
• a second electrode;
• an organic layer arranged between the first electrode and the second electrode,
• wherein the organic layer comprises an emission layer;
• and
• wherein the organic layer further comprises a composition, the composition comprising a boron compound represented by Formula 1 and a phosphorescent material,
• wherein, in Formula 1,
• R11, R12, R13, R14, R21, R22, R23, R24, R31, R32, R33, R34, R41, R42, R51, R52, R53, R54, R55, and R6 are each independently a hydrogen atom, a cyano group, a halogen atom, a deuterium atom, a substituted or unsubstituted aryl group, a substituted or unsubstituted heteroaryl group, a substituted or unsubstituted diarylamino group, a substituted or unsubstituted diheteroarylamino group, a substituted or unsubstituted arylheteroarylamino group, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryloxy group, a substituted or unsubstituted heteroaryloxy group, a substituted or unsubstituted arylthio group, a substituted or unsubstituted heteroarylthio group, or a linker,
• each Ar is independently a substituted or unsubstituted benzene ring, or a substituted or unsubstituted heteroaromatic ring having 5 or 6 ring-forming atoms, wherein Ar optionally comprises a linker,
• m is an integer from 0 to 4, n is an integer from 1 to 5, and a sum of m and n is 5,
• the linker is a single bond or a linking group, and
• ring 3 and ring 6 are not bonded together via the linker, ring 3 and Ar are not bonded together via the linker, ring 4 and ring 6 are not bonded together via the linker, and ring 4 and Ar are not bonded together via the linker.