Organic light-emitting diode

An organic light emitting diode comprising:

• a positive electrode;
• a negative electrode disposed to face the positive electrode;
• a light emitting layer provided between the positive electrode and the negative electrode;
• a hole adjusting layer having one or more layers provided between the positive electrode and the light emitting layer;
• and
• a hole transport layer,
• wherein the organic light emitting diode comprises on the negative electrode a capping layer comprising the following compound:
• wherein the hole adjusting layer is positioned between the light emitting layer and the hole transport layer, and
• wherein one or more layers in the hole adjusting layer comprise at least one compound of Formula 1-1 to 1-3:
• wherein in Formula 1-1 to 1-3:
• L1 is a direct bond or a phenylene, and 11 is 1;
• L2 is a direct bond, a phenylene, or biphenylene, and 12 is 1;
• L3 is a direct bond or a phenylene, and 13 is 1;
• Ar1 is a phenyl group that is unsubstituted or substituted with a phenyl group, a biphenyl group, or a terphenyl group;
• a biphenyl group that is unsubstituted or substituted with a phenyl group or a biphenyl group;
• a terphenyl group that is unsubstituted or substituted with a phenyl group;
• a quaterphenyl group;
• a naphthyl group;
• a fluorenyl group that is unsubstituted or substituted with one or more selected from the group consisting of a methyl group, a phenyl group, and a naphthyl group;
• a carbazolyl group;
• a dibenzofuran group;
• and a dibenzothiophene group;
• R1 is hydrogen, deuterium, a methyl group, a t-butyl group, or a phenyl group, and r1 is 1;
• R2 is hydrogen, deuterium, phenyl, biphenyl, or naphthyl, and r2 is 1;
• G11 and G12 are the same as or different from each other, and are each independently an unsubstituted alkyl group;
• G111 and G112 are the same as or different from each other, and are each independently hydrogen, a methyl group, or a t-butyl group;
• G113 and G114 are hydrogen, and g113 and g114 are each 5;
• g111 and g112 are each an integer from 1 to 5;
• and
• when g111 and g112 are each 2 or more, two or more structures in the parentheses are the same as or different from each other;
• and
• the light emitting layer comprises a host selected from among the following compounds: