Organic Light-Emitting Device and Organic Light-Emitting Display Device Using the Same

An organic light-emitting display device comprising:

• a substrate having regularly arranged first to third subpixels;
• a thin film transistor provided at each of the first to third subpixels;
• and
• first to third organic light-emitting devices, each of which is electrically connected to the thin film transistor at a corresponding one of the first to third subpixels, each of the first to third organic light-emitting devices comprising a first electrode, a second electrode opposite the first electrode, the second electrode being used as an exit side, first to n-th (n being a natural number equal to or greater than 2) stacks disposed between the first and second electrodes, the first to n-th stacks having light-emitting layers that emit light having a same color, and (n-1) charge generation layers disposed between neighboring ones of the first to n-th stacks, each of the (n-1) charge generation layers comprising an n-type charge generation layer and a p-type charge generation layer,
• wherein the light-emitting layers in the first to n-th stacks of each of the first to third subpixels emit light having a same color, and
• wherein, in at least one of the first to third subpixels,
• the second electrode abuts on the n-th stack,
• the light-emitting layer of the n-th stack is a phosphorescent light-emitting layer,
• the light-emitting layer of at least one of the first to (n-1)-th stacks is a fluorescent light-emitting layer, and
• distances from an interface between the n-type and p-type charge generation layers of each of the charge generation layers to the light-emitting layers of stacks adjacent thereto are the same, or a distance from the interface between the n-type charge generation layer and the p-type charge generation layer to the light-emitting layer of a stack close to the second electrode is greater than a distance from the interface between the n-type charge generation layer and the p-type charge generation layer to the light-emitting layer of the stack close to the first electrode.

An organic light-emitting display device comprising:

• a substrate;
• a first electrode of a first subpixel and a first electrode of a second subpixel on the substrate;
• a first light-emitting layer on the first electrode of the first subpixel, wherein the first light-emitting layer is a fluorescent light-emitting layer and is configured to emit light of a first color;
• a second light-emitting layer on the first electrode of the second subpixel disposed adjacent to the first light-emitting layer, wherein the second light-emitting layer is a fluorescent light-emitting layer and is configured to emit light of a second color;
• a charge generation layer on the first light-emitting layer and the second light-emitting layer;
• a third light-emitting layer on the charge generation layer overlapping the first light-emitting layer, wherein the third light-emitting layer is a phosphorescent light-emitting layer and is configured to emit light of the first color;
• a fourth light-emitting layer on the charge generation layer disposed adjacent to the third light-emitting layer and overlapping the second light-emitting layer, wherein the fourth light-emitting layer is a phosphorescent light-emitting layer and is configured to emit light of the second color;
• and
• a second electrode on the third light-emitting layer and the fourth light-emitting layer.