Organic light emitting diode and method of manufacturing the same

An organic light emitting diode comprising:

• a first electrode that is optically reflective;
• a second electrode that is optically transmissible and faces the first electrode;
• an organic emission layer interposed between the first electrode and the second electrode, the organic emission layer comprising:
• at least two first emission layers each comprising a mixed layer that contains a host material and a dopant material, and
• at least one second emission layer comprising only the host material,
• wherein the first emission layer and the second emission layer are alternatively stacked;
• and
• a carrier injection transport layer interposed between the organic emission layer and the first electrode or the second electrode.

An organic light emitting diode comprising:

• a first electrode that is optically reflective;
• a second electrode that is optically transmissible and faces the first electrode;
• an organic emission layer interposed between the first electrode and the second electrode, the organic emission layer comprising a first stack and a second stack, each of the first and second stack comprising:
• a first emission layer comprising a mixed layer that contains a host material and a dopant material, and
• a second emission layer comprising only the host material,
• wherein an order of the first emission layer and the second emission layer in the first stack is other than an order of the first and second emission layers in the second stack;
• and
• a carrier injection transport layer interposed between the organic emission layer and the first electrode or the second electrode.

An organic light emitting diode comprising:

• a first electrode;
• a second electrode that faces the first electrode;
• and
• an organic emission layer interposed between the first electrode and the second electrode, the organic emission layer comprising:
• a first emission layer comprising a host material and a dopant material, and
• a second emission layer comprising only the host material.