Organic light emitting diode and organic light emitting display device including the same

An organic light emitting display device, comprising:

• a substrate including a red pixel region, a green pixel region and a blue pixel region;
• and
• an organic light emitting diodes positioned over the substrate and corresponding to at least one of the red pixel region, the green pixel region and the blue pixel region, the organic light emitting diode including:
• a first electrode;
• a second electrode facing the first electrode;
• a first emitting part including a first emitting material layer and a first electron transporting layer and positioned between the first electrode and the second electrode;
• a second emitting part including a second emitting material layer and positioned between the first emitting part and the second electrode;
• an n-type charge generation layer contacting the first electron transporting layer and positioned between the first electron transporting layer and the second emitting part;
• and
• a p-type charge generation layer contacting the n-type charge generation layer and positioned between the n-type charge generation layer and the second emitting part,
• wherein the first electron transporting layer includes a first compound, and the n-type charge generation layer includes a second compound and an n-type dopant,
• wherein a lowest unoccupied molecular orbital (LUMO) energy level of the first compound is higher than a LUMO energy level of the second compound, and a difference between the LUMO energy level of the first compound and the LUMO energy level of the second compound is about 0.3 to 1.0 eV, wherein the first compound is represented by Formula 1:
• wherein each of X1, X2 and X3 is independently N or CR, and at least one of X1, X2 and X3 is N,
• wherein R is selected from the group consisting of hydrogen, a substituted or unsubstituted C1 to C10 alkyl group, a substituted or unsubstituted C6 to C30 aryl group and a substituted or unsubstituted C3 to C30 heteroaryl group,
• wherein L1 is a substituted or unsubstituted C6 to C30 arylene group, and a is 0 or 1, and
• wherein each of Ar1 and Ar2 is independently selected from the group consisting of a substituted or unsubstituted C6 to C30 aryl group and a substituted or unsubstituted C3 to C30 heteroaryl group,
• wherein the second compound is represented by Formula 3:
• wherein L2 is a substituted or unsubstituted C6 to C30 arylene group, and b is 0 or 1, and
• wherein Ar3 is selected from the group consisting of a substituted or unsubstituted C6 to C30 aryl group and a substituted or unsubstituted C3 to C30 heteroaryl group containing at least one of O and S.