Organic light-emitting device

An organic light-emitting device comprising:

• a first electrode;
• a second electrode;
• an emission layer between the first electrode and the second electrode;
• a first hole transport layer between the first electrode and the emission layer;
• and
• a second hole transport layer between the first hole transport layer and the emission layer,
• wherein the first hole transport layer comprises a first compound represented by Formula 1 and the second hole transport layer comprises a second compound represented by Formula 2:
• wherein, in Formulae 1 and 2,
• Ar1 to Ar3, and Ar11 are each independently selected from a substituted or unsubstituted C3-C10cycloalkylene group, a substituted or unsubstituted C2-C10heterocycloalkylene group, a substituted or unsubstituted C3-C10cycloalkenylene group, a substituted or unsubstituted C2-C10heterocycloalkenylene group, a substituted or unsubstituted C6-C60arylene group, and a substituted or unsubstituted C2-C60heteroarylene group;
• a1 to a3 are each independently an integer from 0 to 5;
• c1 is an integer from 1 to 5;
• R1, R2, R4 to R8, R13, and R14 are each independently selected from a hydrogen atom, a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine, a hydrazone, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a substituted or unsubstituted C1-C60alkyl group, a substituted or unsubstituted C2-C60alkenyl group, a substituted or unsubstituted C2-C60alkynyl group, a substituted or unsubstituted C1-C60alkoxy group, a substituted or unsubstituted C3-C10cycloalkyl group, a substituted or unsubstituted C2-C10heterocycloalkyl group, a substituted or unsubstituted C3-C10cycloalkenyl group, a substituted or unsubstituted C2-C10heterocycloalkenyl group, a substituted or unsubstituted C6-C60aryl group, a substituted or unsubstituted C6-C60aryloxy group, a substituted or unsubstituted C6-C60arylthio group, a substituted or unsubstituted C2-C60heteroaryl group, —N(Q1)(Q2), and —Si(Q3)(Q4)(Q5), where Q1 to Q5 are each independently selected from a C1-C60alkyl group, a C1-C60alkoxy group, a C6-C60aryl group, and a C2-C60heteroaryl group;
• R3, R11, and R12 are each independently selected from a hydrogen atom, a deuterium atom, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine, a hydrazone, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a substituted or unsubstituted C1-C60alkyl group, a substituted or unsubstituted C2-C60alkenyl group, a substituted or unsubstituted C2-C60alkynyl group, a substituted or unsubstituted C3-C10cycloalkyl group, a substituted or unsubstituted C2-C10heterocycloalkyl group, a substituted or unsubstituted C3-C10cycloalkenyl group, a substituted or unsubstituted C2-C10heterocycloalkenyl group, a substituted or unsubstituted C6-C60aryl group, a substituted or unsubstituted C2-C60heteroaryl group, and —Si(Q3)(Q4)(Q5), where Q3 to Q5 are each independently selected from a C1-C60alkyl group, a C1-C60alkoxy group, a C6-C60aryl group, and a C2-C60heteroaryl group;
• b1, b4, c2, and c3 are each independently an integer from 1 to 4;
• and
• b2 and b3 are each independently an integer from 1 to 3.