Wavelength conversion element, light-emitting semiconductor component including a wavelength conversion element, method for producing a wavelength conversion element and method for producing a light-emitting semiconductor component including a wavelength conversion element
Various embodiments may relate to a wavelength conversion element including at least one sintered wavelength converting material, wherein a grid is formed by channels within the sintered wavelength converting material, the channels are at least partially surrounded by the sintered wavelength converting material, the channels reach at least partially through the sintered wavelength converting material in a direction perpendicular or oblique to a main extension direction of the wavelength conversion element, and the channels contain a non-converting sintered separator material.
1. A wavelength conversion element comprising at least one sintered wavelength converting material, wherein
a grid is formed by channels within the sintered wavelength converting material, the channels are at least partially surrounded by the sintered wavelength converting material,
the channels reach at least partially through the sintered wavelength converting material in a direction perpendicular or oblique to a main extension direction of the wavelength conversion element,
the channels contain a non-converting sintered separator material, and the non-converting sintered separator material is non-transmissive to ultraviolet and/or visible light, and
wherein the non-converting sintered separator material absorbs the ultraviolet and/or visible light.
2. The wavelength conversion element according to claim 1 , wherein the channels extend at least partially parallel in the main extension direction of the wavelength conversion element.
3. The wavelength conversion element according to claim 1 ,
wherein the channels completely reach through the sintered wavelength converting material or the channels partially reach through the sintered wavelength converting material.
4. The wavelength conversion element according to claim 1 , wherein the sintered wavelength converting material contains a doped ceramic material selected from one or more of the following materials: YAG: Ce, LuAG:Ce, LuYAG:Ce.
5. The wavelength conversion element according to claim 1 , wherein the sintered wavelength converting material contains one or more materials selected from the group: (AE)SiON, (AE)SiAlON, (AE)AlSiN 3 , (AE) 2 Si 5 N 8 , wherein AE is an alkaline earth metal; sulfides; orthosilicates.
6. The wavelength conversion element according to claim 1 ,
wherein the sintered wavelength converting material contains a wavelength conversion substance dispersed in a matrix material.
7. The wavelength conversion element according to claim 1 ,
wherein the non-converting sintered separator material contains carbon black.
8. A method for producing a wavelength conversion element, the method comprising:
providing a support sheet with a top side and a bottom side lying opposite the top side,
providing a wavelength converting material on the top side of the support sheet,
patterning the wavelength converting material directly or indirectly, thereby forming channels in the wavelength converting material which are at least partially surrounded by the wavelength converting material,
filling the channels with a slurry of non-converting separator material, wherein the non-converting material is non-transmissive to ultraviolet and/or visible light, and
sintering the wavelength conversion element.
9. The method according to claim 8 , wherein
the direct patterning of the wavelength converting material comprises:
forming the channels in a grid-like pattern within the wavelength converting material by selectively removing the wavelength converting material, whereby the channels completely reach, at least in places, through the wavelength converting material, and whereby regions at least partially free of the wavelength converting material are formed.
10. The method according to claim 9 , wherein
the direct patterning is performed such that in addition the channels reach at least partially through the support sheet.
11. The method according to claim 8 , wherein the indirect patterning of the wavelength converting material comprises:
bringing removable insular regions on the top side of the support sheet, wherein the removable insular regions are spaced apart from each other, the wavelength converting material is filled at least in places between the removable insular regions, and the insular regions are removed from the top side of the support sheet, thereby forming the channels.
12. The method according to claim 11 , wherein the removable insular regions comprise a photoresist.
13. The method according to claim 8 , wherein the support sheet comprises an undoped ceramic sheet.
14. The method according to claim 8 , wherein the wavelength conversion element is pre-sintered before sintering.
15. A light-emitting semiconductor component comprising a pixelated light-emitting semiconductor chip, which emits primary radiation during operation via a light coupling-out surface along an emission direction, and a wavelength conversion element,
the wavelength conversion element comprising at least one sintered wavelength converting material, wherein
a grid is formed by channels within the sintered wavelength converting material,
the channels are at least partially surrounded by the sintered wavelength converting material,
the channels reach at least partially through the sintered wavelength converting material in a direction perpendicular or oblique to a main extension direction of the wavelength conversion element,
the channels contain a non-converting sintered separator material, and
the non-converting sintered separator material is non-transmissive to ultraviolet and/or visible light,
wherein the non-converting sintered separator material absorbs the ultraviolet and/or visible light,
wherein the wavelength conversion element is arranged on the light coupling-out surface of the light-emitting semiconductor chip.