Organic light emitting diode and organic light emitting device
AssigneeLG Display Co., Ltd.
InventorsSeung-Hyun Kim, Young-Kwan Jung, Hee-Yeol Kim
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Abstract
An organic light emitting diode (OLED) and an organic light emitting device comprising the OLED (e.g., a display device or a lighting device) are described. The OLED includes a plurality of emitting parts each of which can include an emitting material layer between two electrodes. Each of the emitting material layers is spaced apart from each other or from the electrodes. As the distances among the electrodes and the emitting material layers and/or among emitting material layers are controlled, the OLED can secure sufficient amount of light emission as well as beneficial luminous efficiency and wide viewing angle.
Claims25
An organic light emitting diode, comprising:
- a reflective electrode;
- a transmissive electrode facing the reflective electrode;
- and
- an emissive layer between the reflective electrode and the transmissive electrode, the emissive layer including:
- a first emitting part between the reflective electrode and the transmissive electrode, the first emitting part comprising a first emitting material layer;
- a second emitting part between the first emitting part and the transmissive electrode, the second emitting part comprising a second emitting material layer;
- a third emitting part between the second emitting part and the transmissive electrode, the third emitting part comprising a third emitting material layer;
- a first charge generation layer between the first emitting part and the second emitting part;
- and
- a second charge generation layer between the second emitting part and the third emitting part,
- wherein a first distance from a top surface of the reflective electrode to a bottom surface of the first emitting material layer, a second distance from the bottom surface of the first emitting material layer to a bottom surface of the second emitting material layer, a third distance from the bottom surface of the second emitting material layer to a bottom surface of the third emitting material layer, and a fourth distance from the bottom surface of the third emitting material layer to a bottom surface of the transmissive electrode have a ratio of 3.0 to 3.75:1:2.0 to 2.75:1.5 to 2.25.
An organic light emitting diode, comprising:
- a reflective electrode;
- a transmissive electrode facing the reflective electrode;
- and
- an emissive layer between the reflective electrode and the transmissive electrode, the emissive layer including:
- a first emitting part between the reflective electrode and the transmissive electrode, the first emitting part comprising a first emitting material layer;
- a second emitting part between the first emitting part and the transmissive electrode;
- a third emitting part disposed between the second emitting part and the transmissive electrode;
- a first charge generation layer between the first emitting part and the second emitting part;
- and
- a second charge generation layer between the second emitting part and the third emitting part,
- wherein a distance between a top surface of the reflective electrode and a bottom surface of the first emitting material layer is in a range between 1400 Å and 1500 Å.
An organic light emitting diode, comprising:
- a reflective electrode;
- a first emitting part on the reflective electrode, the first emitting part comprising a first emitting material layer configured to emit blue light;
- a first charge generation layer on the first emitting part;
- a second emitting part on the first charge generation layer, the second emitting part including a second emitting material layer comprising a red emitting material layer configured to emit red light and a green emitting material layer configured to emit green light, the green emitting material layer on the red emitting material layer;
- a second charge generation layer on the second emitting part;
- a third emitting part on the second charge generation layer, the third emitting part including a third emitting material layer configured to emit the blue light;
- and
- a transmissive electrode on the third emitting part,
- wherein a distance between a top surface of the reflective electrode and a bottom surface of the first emitting material layer is in a range between 1400 Å and 1500 Å.
Dependencies are inferred from the claim text.