Organic light-emitting component

Patent metadata

Field	Value
Publication number	US-9385338-B2
Application number	US-201314383511-A
Country	US
Kind code	B2
Filing date	Mar 1, 2013
Priority date	Mar 6, 2012
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

An organic light-emitting component includes a first light-emitting layer sequence, which is designed to emit light in a first wavelength range during the operation of the component. A second light-emitting layer sequence is designed to emit light in a second wavelength range during the operation of the component. A charge carrier generating layer sequence is designed to output charge carriers to the first light-emitting layer sequence and to the second light-emitting layer sequence during the operation of the component. The first wavelength range differs from the second wavelength range. The charge carrier generating layer sequence is arranged between the first light-emitting layer sequence and the second light-emitting layer sequence in a stacking direction of the organic light-emitting component.

First claim

The invention claimed is:

1. An organic light-emitting component comprising:
a first light-emitting layer sequence, which is designed to emit light in a first wavelength range during operation of the component, wherein the first wavelength range comprises the spectral range of blue light;
a second light-emitting layer sequence, which is designed to emit light in a second wavelength range during the operation of the component, wherein the second wavelength range comprises the spectral range of red-green mixed light, and wherein the organic light-emitting component is configured to emit white light;
a charge carrier generating layer sequence between the first light-emitting layer sequence and the second light-emitting layer sequence in a stacking direction of the organic light-emitting component, wherein the charge carrier generating layer sequence is designed to output charge carriers to the first light-emitting layer sequence and to the second light-emitting layer sequence during the operation of the component, wherein the charge carrier generation layer sequence exclusively comprises layers which are formed with an undoped organic material selected from the group consisting of HAT-CN, NDN-26, NET-18, LG-201, and wherein the charge carrier generating layer sequence has a thickness of, at most, 25 nm in the stacking direction; and
two at least partly reflective electrodes that form an optical microcavity of the organic light-emitting component, wherein the first and second light-emitting layer sequences are arranged between the electrodes and wherein all light-emitting layer sequences are arranged in a first amplification region of the optical microcavity.

2. The organic light-emitting component according to claim 1 , wherein exactly one charge carrier generating layer sequence is arranged between each pair of adjacent light-emitting layer sequences.

3. The organic light-emitting component according to claim 1 , wherein each charge carrier generating layer sequence directly adjoins two light-emitting layer sequences.

4. The organic light-emitting component according to claim 1 , wherein the charge carrier generating layer sequence acts as a tunnel barrier.

5. The organic light-emitting component according to claim 1 , wherein a first of the electrodes is light-nontransmissive and the first light-emitting layer sequence is located nearer to the first of the electrodes than the second light-emitting layer sequence.

6. The organic light-emitting component according to claim 1 , wherein the charge carrier generating layer sequence comprises a p-side layer that directly adjoins the first light-emitting layer sequence or the second light-emitting layer sequence, and wherein the p-side layer comprises HAT-CN.

7. The organic light-emitting component according to claim 1 , wherein the charge carrier generating layer sequence comprises an n-side layer that directly adjoins the first light-emitting layer sequence or the second light-emitting layer sequence, wherein the n-side layer comprises a material selected from the group consisting of NDN-26, NET-18, and LG-201.

8. The organic light-emitting component according to claim 1 , wherein the mechanism of light generation is different in different light-emitting layer sequences.

9. The organic light-emitting component according to claim 1 , wherein light generation in the first light-emitting layer sequence takes place by fluorescence and light generation in the second light-emitting layer sequence takes place by phosphorescence.

10. The organic light-emitting component according to claim 1 ,
wherein the charge carrier generating layer sequence comprises a p-side layer and an n-side layer, the p-side layer directly adjoining one of the two light-emitting layer sequences and the n-side layer directly adjoining the other of the two light-emitting layer sequences;
wherein the p-side layer comprises of HAT-CN; and
wherein the n-side layer comprises a material selected from the group consisting of NDN-26, NET-18, and LG-201.

Assignees

• Osram Opto Semiconductors Gmbh
• Osram Oled Gmbh

Inventors

• Wehlus Thomas
• Jaeger Arndt

Classifications

• H10K50/818

  Reflective anodes, e.g. ITO combined with thick metallic layers · CPC title

• H10K50/13

  comprising stacked EL layers within one EL unit · CPC title

• H10K50/131 Primary

  with spacer layers between the electroluminescent layers · CPC title

• H01L51/504 Primary

  Electricity · mapped topic

• H01L51/5218

  Electricity · mapped topic