Light-emitting element, monoamine compound for the light-emitting element, and electronic apparatus including the light-emitting element

A monoamine compound represented by Formula 1:

• wherein, in Formula 1,
• L1 to L3 are each independently a direct linkage, a substituted or unsubstituted arylene group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroarylene group having 5 to 30 ring-forming carbon atoms,
• atoms at an ortho position with respect to N in L1 to L3 are each independently bonded to hydrogen or deuterium,
• Ar1 is a substituted or unsubstituted aryl group having 10 to 30 ring-forming carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 30 ring-forming carbon atoms,
• a case where Ar1 is an aryl group in which a plurality of phenyl groups is connected by a direct linkage is excluded,
• at least two selected from among Ra1 to Ra5 are each a substituted or unsubstituted phenyl group, and the rest are each independently hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl group having 1 to 15 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 5 to 30 ring-forming carbon atoms,
• a case where Ra1 and Ra5 are each a phenyl group at the same time is excluded,
• Rc is hydrogen, deuterium, or fluorine,
• at least one selected from among Rb1 to Rb6 is a substituted or unsubstituted phenyl group, and the rest are each independently hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl group having 1 to 15 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 5 to 30 ring-forming carbon atoms,
• when Ra2 and Ra3 are each a phenyl group or Ra3 and Ra4 are each a phenyl group, then L1 is a direct linkage,
• the monoamine compound comprises no nitrogen-containing heterocyclic group,
• the monoamine compound comprises no cyclic group comprising a carbon atom which comprises sp3 hybrid orbitals, and
• any hydrogen of the monoamine compound is optionally substituted with deuterium.

An electronic apparatus comprising a display device,

• the display device comprising:
• a base layer;
• a circuit layer on the base layer;
• and
• a display element layer on the circuit layer and comprising a light-emitting element,
• wherein the light-emitting element comprises:
• a first electrode;
• a hole transport region on the first electrode and comprising a monoamine compound represented by Formula 1;
• 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, in Formula 1,
• L1 to L3 are each independently a direct linkage, a substituted or unsubstituted arylene group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroarylene group having 5 to 30 ring-forming carbon atoms,
• atoms at an ortho position with respect to N in L1 to L3 are each independently bonded to hydrogen or deuterium,
• Ar1 is a substituted or unsubstituted aryl group having 10 to 30 ring-forming carbon atoms or a substituted or unsubstituted heteroaryl group having 5 to 30 ring-forming carbon atoms,
• a case where Ar1 is an aryl group in which a plurality of phenyl groups is connected by a direct linkage is excluded,
• at least two selected from among Ra1 to Ra5 are each a substituted or unsubstituted phenyl group, and the rest are each independently hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl group having 1 to 15 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 5 to 30 ring-forming carbon atoms,
• a case where Ra1 and Ra5 are each a phenyl group at the same time is excluded,
• Rc is hydrogen, deuterium, or fluorine,
• at least one selected from among Rb1 to Rb6 is a substituted or unsubstituted phenyl group, and the rest are each independently hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl group having 1 to 15 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 ring-forming carbon atoms, or a substituted or unsubstituted heteroaryl group having 5 to 30 ring-forming carbon atoms,
• when Ra2 and Ra3 are each a phenyl group or Ra3 and Ra4 are each a phenyl group, then L1 is a direct linkage,
• the monoamine compound comprises no nitrogen-containing heterocyclic group,
• the monoamine compound comprises no cyclic group comprising a carbon atom that comprises sp3 hybrid orbitals, and
• any hydrogen of the monoamine compound is optionally substituted with deuterium.