IP Library Granted Patent US 9,543,471
Granted Patent B2
US 9,543,471 · App. 14/889,316 · Granted Jan 10, 2017

Optoelectronic component and method for the production thereof

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Quick Facts
Patent No.
US 9,543,471
App. No.
14/889,316
Granted
Jan 10, 2017
Kind
B2
Abstract

An optoelectronic device ( 10, 1010 ) having a semiconductor layer structure ( 100, 1100 ) comprising a first light-active layer ( 140 ) and a second light-active layer ( 240 ). A first tunnel junction ( 200 ) is formed between the first light-active layer ( 140 ) and the second light-active layer ( 240 ). A first Bragg reflector ( 160 ) is formed between the first light-active layer ( 140 ) and the first tunnel junction ( 200 ). A second Bragg reflector ( 260 ) is formed between the second light-active layer ( 240 ) and the first tunnel junction ( 200 ).

Claims (45)

1. An optoelectronic device having a semiconductor layer structure comprising:

a substrate;

a first light-active layer and a second light-active layer,

wherein a first tunnel junction is formed between the first light-active layer and the second light-active layer,

wherein a first Bragg reflector is formed between the first light-active layer and the first tunnel junction, and

wherein a second Bragg reflector is formed between the second light-active layer and the first tunnel junction;

wherein at least a portion of an electromagnetic radiation emitted by the first light-active layer leaves the optoelectronic device via the substrate,

wherein the optoelectronic device is a light emitting diode, and

wherein at least a portion of the electromagnetic radiation emitted in the semiconductor layer structure leaves the optoelectronic device through a surface of the semiconductor layer structure that faces away from the substrate.

2. The optoelectronic device according to claim 1 ,

wherein the first Bragg reflector is configured to reflect electromagnetic radiation from the first light-active layer which impinges on the first Bragg reflector.

3. The optoelectronic device according to claim 2 ,

wherein the first light-active layer is configured to emit electromagnetic radiation with a wavelength from a first wavelength interval, wherein the first Bragg reflector is configured to reflect electromagnetic radiation with a wavelength from the first wavelength interval.

4. The optoelectronic device according to claim 3 ,

wherein the first Bragg reflector comprises a plurality of alternating first layers, which comprise a first material, and second layers, which comprise a second material.

5. The optoelectronic device according to claim 4 ,

wherein each pair of a first layer and an adjacent second layer together comprises an optical thickness which is at least as great as half a wavelength of electromagnetic radiation emitted by the first light-active layer.

6. The optoelectronic device according to claim 4 ,

wherein the first material and the second material have different refractive indices.

7. The optoelectronic device according to claim 4 ,

wherein the first material and the second material are group-III phosphides.

8. The optoelectronic device according to claim 4 ,

wherein the first material and the second material are group-III nitrides.

9. The optoelectronic device according to claim 1 ,

wherein the first Bragg reflector is n-doped and the second Bragg reflector is p-doped, or the first Bragg reflector is p-doped and the second Bragg reflector is n-doped.

10. The optoelectronic device according to claim 1 ,

wherein the second Bragg reflector is configured to reflect electromagnetic radiation from the second light-active layer which impinges on the second Bragg reflector.

11. The optoelectronic device according to claim 1 ,

wherein the first tunnel junction comprises a p-doped region with a degree of doping of at least 10^20 per cubic centimeter and an n-doped region with a degree of doping of at least 10^20 per cubic centimeter.

12. The optoelectronic device according to claim 11 ,

wherein a spacer layer is arranged between the p-doped region of the first tunnel junction and the n-doped region of the first tunnel junction,

wherein the spacer layer has a lower degree of doping than the p-doped region of the first tunnel junction and is preferably undoped.

13. The optoelectronic device according to claim 1 ,

wherein the first light-active layer takes the form of a quantum film structure.

14. The optoelectronic device according to claim 1 ,

wherein the semiconductor layer structure comprises a third light-active layer,

wherein a second tunnel junction is arranged between the second light-active layer and the third light-active layer,

wherein a third Bragg reflector is formed between the second light-active layer and the second tunnel junction,

wherein a fourth Bragg reflector is formed between the third light-active layer and the second tunnel junction.

15. The optoelectronic device according to claim 1 ,

wherein the first Bragg reflector is nontransparent for electromagnetic radiation emitted in the first light-active layer.

16. The optoelectronic device according to claim 1 ,

wherein the second Bragg reflector is nontransparent for electromagnetic radiation emitted in the second light-active layer.

17. The optoelectronic device according to claim 16 ,

wherein in the first tunnel junction an absorption of the electromagnetic radiation, which is emitted in the first and second light-active layers, is prevented by the reflection of the electromagnetic radiation at the first Bragg reflector and the second Bragg reflector.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 3, 2020
From: OSRAM OPTO SEMICONDUCTORS GMBH
To: OSRAM OLED GMBH
Reel/Frame 051467/0906 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jan 26, 2016
From: NAGEL, PETER; ILLEK, STEFAN; STRASSBURG, MARTIN
To: OSRAM OPTO SEMICONDUCTORS GMBH
Reel/Frame 037582/0492 →