Organic light emitting device, organic light emitting display apparatus having the organic light emitting device and method of manufacturing the same

An organic light emitting display apparatus comprising:

• a first substrate;
• a switching device on the first substrate;
• an organic light emitting device electrically connected to the switching device, wherein the organic light emitting device comprises:
• a first electrode;
• a hole injection layer on the first electrode;
• a hole transport layer on the hole injection layer;
• an organic light emitting layer on the hole transport layer;
• a first electron transport layer on the organic light emitting layer wherein the first electron transport layer comprises a first material for improving a thermal stability, a second material for improving a luminous efficiency and a third material for reducing a driving voltage;
• a second electron transport layer on the organic light emitting layer, wherein the second electron transport layer is laminated with the first electron transport layer;
• an electron injection layer on the second electron transport layer;
• and
• a second electrode on the electron injection layer, wherein the second electrode faces the first electrode;
• and
• a second substrate on the organic light emitting device.

A method of manufacturing an organic light emitting display apparatus, the method comprising:

• providing a first electrode on a first substrate on which a switching device is formed;
• providing a hole injection layer on the first electrode;
• providing a hole transport layer on the hole injection layer;
• providing an organic light emitting layer on the hole transport layer;
• providing a first electron transport layer on the organic light emitting layer wherein the first electron transport layer comprising a first material for improving a thermal stability, a second material for improving a luminous efficiency and a third material for reducing a driving voltage;
• providing a second electron transport layer on the organic light emitting layer wherein the second electron transport layer is laminated with the first electron transport layer;
• providing an electron injection layer on the second electron transport layer;
• providing a second electrode on the electron injection layer, wherein the second electrode faces the first electrode;
• and
• encapsulating the switching device and the organic light emitting layer with a second substrate.