Organic electroluminescence device and monoamine compound 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 hole transport region includes a monoamine compound represented by at least one of the following Formulae 2 to 8:
• wherein in Formula 2 to 8,
• Ar1 and Ar2 are each independently a substituted or unsubstituted alkyl group having 1 to 10 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroaryl group having 2 to 30 ring carbon atoms, provided that when any one of Ar1 and Ar2 is 3-dibenzofuranyl, the other one of Ar1 and Ar2 is not 9-phenanthryl,
• L is a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms, or a substituted or unsubstituted heteroarylene group having 2 to 30 ring carbon atoms,
• R1 is a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, or a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms,
• R2 is a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, or a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms,
• a is an integer of 0 to 3,
• m is an integer of 0 to 1, and
• n is an integer of 0 to 6,
• wherein in Formula 3,
• i) when one of Ar1 and Ar2 is a naphthalene group or a phenyl group substituted with a naphthalene group and the other one of Ar1 and Ar2 is a substituted or unsubstituted aryl group,
• the naphthalene group in the one of Ar1 and Ar2 is unsubstituted, or
• the substituted or unsubstituted aryl group of the other one of Ar1 and Ar2 is a substituted or unsubstituted aryl group having 7 to 30 ring carbon atoms, and
• ii) L is a substituted or unsubstituted arylene group having 6 to 30 ring carbon atoms,
• wherein in Formula 4, a is an integer of 1 to 3,
• wherein in Formula 6,
• i) Ar1 and Ar2 are not dimethylfluorenyl groups,
• ii) when any one of Ar1 and Ar2 is a p-biphenyl group and the other one of Ar1 and Ar2 includes an aryl substituent, the number of ring carbon atoms in the aryl substituent is 13 to 30,
• iii) L is a phenylene group, a is an integer of 1 or more and 3 or less, and when L includes an m-phenylene group, Ar1 and Ar2 are not an unsubstituted or alkyl-substituted phenyl group, or an unsubstituted p-biphenyl group, and
• vi) when Ar1 and Ar2 are each a heteroaryl group comprising S, or one of Ar1 or Ar2 is a heteroaryl group comprising S, and an other one of Ar1 or Ar2 is a heteroaryl group comprising O, the heteroaryl group comprising S is a substituted or unsubstituted dibenzothiophene group, and the heteroaryl group comprising O is a substituted or unsubstituted dibenzofuran group, and
• wherein in Formula 7 and Formula 8,
• i) Ar1 and Ar2 are not an unsubstituted p-biphenyl group or an unsubstituted p-terphenyl group,
• ii) when Ar1 and Ar2 are a fluorene group or a fluorene derivative, Ar1 and Ar2 are substituents represented by Formula 7a;
• wherein in Formula 7a,
• R3 is a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, or a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms,
• R4 and R5 are each independently a hydrogen atom, a deuterium atom, a halogen atom, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, or a substituted or unsubstituted aryl group having 6 to 30 ring carbon atoms, and/or combine with each other to form a ring,
• is an integer of 0 or more and 3 or less,
• p is an integer of 0 or more and 4 or less,
• iii) L is a substituted or unsubstituted phenylene group, and
• vi) when one of Ar1 and Ar2 is an unsubstituted 2-dibenzofuran group, an unsubstituted 2-dibenzothiophene group, an unsubstituted 3-dibenzofuran group, or an unsubstituted 3-dibenzothiophene group, the other one of Ar1 and Ar2 is a substituted or unsubstituted phenylnaphthyl group, a substituted or unsubstituted dibenzofuran group, or a substituted or unsubstituted dibenzothiophene group.