Organic light emitting diode

An organic light emitting diode comprising a substrate comprising:

• a first subpixel, a second subpixel, and a third subpixel;
• a plurality of first electrodes disposed in the first subpixel, the second subpixel, and the third subpixel;
• a second electrodes disposed opposite to the first electrodes;
• an emission layer disposed between the first electrodes and the second electrode and comprising a first emission layer, a second emission layer and a third emission layer;
• the first emission layer is disposed between the first electrode in the first subpixel and the second electrode and emits a first colored light;
• the second emission layer is disposed between the first electrode in the second subpixel and the second electrode and emits a second colored light;
• the third emission layer is disposed between the first electrode in the third subpixel and the second electrode and emits a third colored light;
• a hole transport layer disposed between the first electrode and the emission layer;
• an electron transport layer disposed between the emission layer and the second electrode;
• and
• a layer for improving third colored light efficiency disposed between the third emission layer and the hole transport layer;
• wherein, the first colored light is a red light, the second colored light is a green light, and the third colored light is a blue light,
• wherein the layer for improving third colored light efficiency comprises a carbazole-based compound represented by Formula 1 below;
• wherein, the electron transport layer comprises an electron transport material represented by one of Formulas 10A, 10B, 10C, and 20A:
• wherein, in Formula 1,
• L50 is a substituted or unsubstituted C6-C60 arylene group or a substituted or unsubstituted C2-C60 heteroarylene group;
• y is an integer of 1 to 5;
• R50 and R51 are each independently, a substituted or unsubstituted C6-C60aryl group, or a substituted or unsubstituted C2-C60 heteroaryl group;
• R60 to R67 are each independently, 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 group, 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-C60 alkyl group, a substituted or unsubstituted C2-C60 alkenyl group, a substituted or unsubstituted C2-C60 alkynyl group, a substituted or unsubstituted C1-C60 alkoxy group, a substituted or unsubstituted C3-C10 cycloalkyl group, a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C6-C60 aryloxy group, or a substituted or unsubstituted C6-C60 arylthio group;
• in Formulae 10A to 10C,
• Ar41 and Ar42 are each independently, a substituted or unsubstituted C6-C60 aryl group or a substituted or unsubstituted C2-C60 heteroaryl group;
• L1 and L2 are each independently, a substituted or unsubstituted C6-C60 arylene group or a substituted or unsubstituted C2-C60 heteroarylene group;
• a and b are each independently, 0, 1 or 2;
• R1 and R2 are each independently, a substituted or unsubstituted benzimidazolyl group, a substituted or unsubstituted benzoxazolyl group, a substituted or unsubstituted benzothiazolyl group, a substituted or unsubstituted benzopyrimidinyl group, a substituted or unsubstituted imidazopyridinyl group, a substituted or unsubstituted quinolinyl group, a substituted or unsubstituted isoquinolinyl group, a substituted or unsubstituted quinazolyl group, a substituted or unsubstituted pyridinyl group, a substituted or unsubstituted pyrimidinyl group, a substituted or unsubstituted pyrazinyl group, a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted pyrenyl group, a substituted or unsubstituted chrysenyl group, a substituted or unsubstituted fluorenyl group or a substituted or unsubstituted phenanthrenyl group;
• R3 and R4 are each independently, a C1-C20 alkyl group, a C6-C20 aryl group;
• a C1-C20 alkyl group, or a C2-C20 aryl group, each of which can be substituted with at least one of a deuterium atom, —F, —Cl, —Br, —I, —CN, a hydroxyl group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, or a phosphoric acid group or a salt thereof;
• and
• wherein, in Formula 20A,
• T1 to T3 are each independently, an N or a C(R100), wherein R100 is a hydrogen atom;
• a deuterium atom;
• —F;
• —Cl;
• —Br;
• —I;
• —CN;
• a hydroxyl group;
• —NO2;
• an amino group;
• an amidino group;
• a hydrazine group;
• 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 C1-C60 alkyl group;
• a C1-C60 alkoxy group;
• a C1-C60 alkyl group;
• a C1-C60 alkoxy group;
• each of which can be substituted with at least one of a deuterium atom, —F, —Cl, —Br, —I, —CN, a hydroxyl group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone, a carboxyl group or a salt thereof, a sulfonic acid group or a salt thereof, or a phosphoric acid group or a salt thereof;
• Ar201 to Ar203 are each independently, a substituted or unsubstituted C6-C60 arylene group or a substituted or unsubstituted C2-C60 heteroarylene group;
• p, q and r are each independently, 0, 1 or 2;
• Ar211 to Ar213 are each independently, a substituted or unsubstituted C6-C60 aryl group or a substituted or unsubstituted C2-C60heteroaryl group.