Converter Material, Method for Producing a Converter Material, and Optoelectronic Component

• US 20150255688A1
• Filed: 11/04/2013
• Published: 09/10/2015
• Est. Priority Date: 11/07/2012
• Status: Active Grant

• Current Assignee: OSRAM OLED GMBH (Ams-Osram AG)
• Original Assignee: Osram Opto Semiconductors GmbH (Ams-Osram AG)
• Inventors: Stoll, Ion, Gtz, Britta
• Granted Patent: US 10,297,727 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: C09K 11/02 Use of particular materials as binders, particle coatings or suspension media therefor
• CPC Class Codes: C09K 11/025 non-luminescent particle coatings or suspension media
• CPC Class Codes: C09K 11/08 containing inorganic luminescent materials
• CPC Class Codes: C09K 11/565 with zinc cadmium
• CPC Class Codes: C09K 11/883 with zinc or cadmium
• CPC Class Codes: G02B 1/10 Optical coatings produced by application to, or surface treatment of, optical elements G02B1/08 takes precedence
• CPC Class Codes: H01L 2224/48091 Arched
• CPC Class Codes: H01L 2924/00014 the subject-matter covered by the group, the symbol of which is combined with the symbol of this group, being disclosed without further technical details
• CPC Class Codes: H01L 2933/0041 relating to wavelength conversion elements
• CPC Class Codes: H01L 33/501 characterised by the materials, e.g. binder
• CPC Class Codes: H01L 33/502 Wavelength conversion materials
• CPC Class Codes: H01L 33/504 Elements with two or more wavelength conversion materials
• CPC Class Codes: H01L 33/507 the elements being in intimate contact with parts other than the semiconductor body or integrated with parts other than the semiconductor body
• CPC Class Codes: H01L 33/56 Materials, e.g. epoxy or silicone resin

Abstract

A converter material includes a porous inorganic matrix material having a multiplicity of pores. A multiplicity of inorganic nanoparticles are applied on the surface of the matrix material. The nanoparticles are suitable for converting electromagnetic radiation in a first wavelength range into electromagnetic radiation in a second wavelength range. A method for producing such a converter material and an optoelectronic component that includes such a converter material are furthermore specified.

Claims

1-20. -20. (canceled)

21. A converter material comprising:

a porous inorganic matrix material having a plurality of pores; and

a plurality of inorganic nanoparticles applied on a surface of the matrix material, wherein the nanoparticles are suitable for converting electromagnetic radiation in a first wavelength range into electromagnetic radiation in a second wavelength range.

22. The converter material according to claim 21, wherein the pores have an average diameter of between 2 nanometers and 50 nanometers inclusive.

23. The converter material according to claim 21, wherein the nanoparticles have a diameter of between 1 nanometer and 50 nanometers inclusive.

24. The converter material according to claim 21, wherein the nanoparticles are arranged in a manner spaced apart from one another on the surface of the pores.

25. The converter material according to claim 21, wherein a further plurality of nanoparticles are applied to the surface of the pores and are suitable for converting electromagnetic radiation in the first wavelength range into electromagnetic radiation in a third wavelength range.

26. The converter material according to claim 21, wherein the converter material forms a plurality of converter particles.

27. The converter material according to claim 26, wherein the converter particles have a diameter of between 1 micrometer and 50 micrometers inclusive.

28. The converter material according to claim 26, wherein the converter particles have a diameter of between 20 nanometers and 1000 nanometers inclusive.

29. The converter material according to claim 21, wherein the converter material is shaped as a planar plate or as a domed plate.

30. The converter material according to claim 21, wherein the inorganic matrix material comprises an oxide of one of the following materials or of a mixture of the following materials:

silicon, aluminum, tantalum, titanium, zirconium, cerium, tin, niobium.

31. The converter material according to claim 21, wherein the inorganic nanoparticles comprise one of the following materials:

zinc sulfide, cadmium sulfide, zinc selenide, zinc oxide, cadmium selenide, cadmium oxide, indium phosphide, copper indium sulfide, lead sulfide.

32. The converter material according to claim 21, wherein the inorganic nanoparticles are core-shell nanoparticles.

33. The converter material according to claim 21, wherein the nanoparticles are arranged only on the surface of the pores, while a volume region of the pores is free of the nanoparticles.

34. The converter material according to claim 21, wherein:

the converter material forms a plurality of converter particles;

the nanoparticles are arranged in a manner spaced apart from one another on the surface of the pores; and

the nanoparticles are arranged only on the surface of the pores, while a volume region of the pores is free of the nanoparticles.

38. A method for processing the particles of the converter material according to claim 26, wherein the processing uses one of the following methods:

potting, printing, electrophoretic deposition, spray coating, molding, sol-gel process.

35. A method for producing a converter material, the method comprising:

providing a porous inorganic matrix material having a plurality of pores;

introducing a plurality of nanoparticles into the pores; and

adsorbing the nanoparticles on a surface of the pores.

36. The method according to claim 35 wherein:

the nanoparticles are introduced into a solvent;

the solvent with the nanoparticles is introduced into the pores of the inorganic matrix material;

the nanoparticles adsorb on the surface of the pores; and

the solvent is removed again from the pores.

37. The method according to claim 36, wherein the nanoparticles in the solvent have a concentration that is not greater than 150 mg/ml.

39. An optoelectronic component comprising:

a semiconductor body, which emits electromagnetic radiation in a first wavelength range from a radiation exit surface during operation; and

a converter material adjacent to the exit surface of the semiconductor body, wherein the converter material comprises a porous inorganic matrix material having a plurality of pores, on the surface of which a plurality of inorganic nanoparticles are applied, wherein the nanoparticles are suitable for converting electromagnetic radiation in a first wavelength range into electromagnetic radiation in a second wavelength range.

40. The optoelectronic component according to claim 39, wherein the converter material is present as converter particles in a potting.