Organic light emitting diode and organic light emitting device

An organic light emitting diode, comprising:

• a first electrode;
• a second electrode facing the first electrode;
• and
• an emissive layer disposed between the first electrode and the second electrode,
• wherein the emissive layer comprises:
• a first emitting part;
• a second emitting part disposed between the first emitting part and the second electrode;
• and
• a first charge generation layer disposed between the first emitting part and the second emitting part,
• wherein one of the first emitting part and the second emitting part comprises a first blue emitting material layer, and
• wherein another of the first emitting part and the second emitting part comprises:
• a red emitting material layer comprising a first red host;
• a yellow-green emitting material layer disposed between the red emitting material layer and the second electrode, and comprising a first yellow-green host;
• a green emitting material layer disposed between the yellow-green emitting material layer and the second electrode, and comprising a first green host,
• wherein each of the red emitting material layer and the green emitting material layer has a thickness larger than a thickness of the yellow-green emitting material layer;
• and
• optionally, wherein the thickness of the green emitting material layer is larger than the thickness of the red emitting material layer.