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

An organic light emitting diode, comprising:

• first and second electrodes facing each other;
• a first emitting part between the first and second electrodes, and including a first emitting material layer and an electron transporting layer;
• a second emitting part between the first emitting part and the second electrode, and including a second emitting material layer;
• and
• a charge generation layer between the first and second emitting parts,
• wherein at least one of the electron transporting layer and the charge generation layer includes an organic compound represented by following Formula:
• wherein each of X1 to X5 is independently selected from a carbon atom or a nitrogen atom, and at least two or three of X1 to X5 are N,
• wherein each of R1 and R2 is independently selected from a substituted aryl group, a non-substituted aryl group, a substituted heteroaryl group or a non-substituted heteroaryl group, and a is an integer between 0 to 3, and
• wherein each of L1 and L2 is independently selected from a substituted arylene group, a non-substituted arylene group, a substituted heteroarylene group or a non-substituted heteroarylene group, and b is 0 or 1.

An organic light emitting display device, comprising:

• a substrate;
• an organic light emitting diode over the substrate and including:
• first and second electrodes facing each other,
• a first emitting part between the first and second electrodes, and including a first emitting material layer and an electron transporting layer,
• a second emitting part between the first emitting part, and the second electrode and including a second emitting material layer, and
• a charge generation layer between the first and second emitting parts;
• and
• a thin film transistor between the substrate and the organic light emitting diode and connected to the first electrode,
• wherein at least one of the electron transporting layer and the charge generation layer includes an organic compound represented by following Formula:
• wherein each of X1 to X5 is independently selected from a carbon atom or a nitrogen atom, and at least two or three of X1 to X5 are N,
• wherein each of R1 and R2 is independently selected from a substituted aryl group, a non-substituted aryl group, a substituted heteroaryl group or a non-substituted heteroaryl group, and a is an integer between 0 to 3, and
• wherein each of L1 and L2 is independently selected from a substituted arylene group, a non-substituted arylene group, a substituted heteroarylene group or a non-substituted heteroarylene group, and b is 0 or 1.