EP-4739748-A1 - LUMINOPHORE, PROCESS FOR PRODUCING A LUMINOPHORE, USE OF A LUMINOPHORE, AND OPTOELECTRONIC COMPONENT

EP4739748A1EP 4739748 A1EP4739748 A1EP 4739748A1EP-4739748-A1

Abstract

The invention relates to a luminophore (1) with the sum formula Li 8-2x-a MB x+c MF a MC 1-c [MAMD 4-z-b ME z MG b N 4-z+b-c O 8+z-b+c ]:E, wherein 0≤x≤4, 0≤c≤1, 0≤z≤4, 0≤a≤8, 0≤b≤4, 0≤2x+a≤8, 0≤z+b≤4, - 4≤-z+b-c≤4. The invention also relates to a process for producing a luminophore, to the use of a luminophore, and to an optoelectronic component.

Inventors

SEIBALD, Markus
WURST, KLAUS
STOLL, Christiane
LANGE, STEFAN
PHILIPP, Frauke
TRAGL, SONJA
VORSTHOVE, Mark
RIESSBECK, Max Kilian
Heymann, Gunter
HUPPERTZ, Hubert

Assignees

ams-OSRAM International GmbH

Dates

Publication Date: 20260513
Application Date: 20240701

Claims (1)

2023PF00709 July 1, 2024 P2023,0785 WO N - 164 - Patent claims 1. Phosphor (1) with the empirical formula Li 8-2x-a MB x+c MF a MC 1-c [MAMD 4-zb ME z MG b N 4-z+bc O 8+z-b+c ]:E, where - 0 ≤ x ≤ 4, 0 ≤ c ≤ 1, 0 ≤ z ≤ 4, 0 ≤ a ≤ 8, 0 ≤ b ≤ 4, - 0 ≤ 2x+a ≤ 8, 0 ≤ z+b ≤ 4, -4 ≤ -z+bc ≤ 4, - MB is an element or a combination of elements selected from the group of divalent elements, - MC is an element or a combination of elements selected from the group of trivalent elements, - MA is Li and/or Na, - MD is an element or a combination of elements selected from the group of tetravalent elements, - ME is an element or a combination of elements selected from the group of trivalent elements, - MF is an element or a combination of elements selected from the group of monovalent elements, - MG is an element or a combination of elements selected from the group of pentavalent elements, and - E is an activator element. 2. Phosphor (1) according to the preceding claim, wherein - MB is an element or a combination of elements selected from the following group: Be, Mg, Ca, Sr, Ba, Zn, - MC is an element or a combination of elements selected from the following group: Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, - MD is an element or a combination of elements selected from the following group: Si, Ge, Sn, Pb, Ti, Zr, Hf, 2023PF00709 July 1, 2024 P2023,0785 WO N - 165 - - ME is an element or a combination of elements selected from the following group: B, Al, Ga, In, Sc, Cr, - MF is an element or a combination of elements selected from the following group: Na, K, Rb, Cs, Au, Cu, Pt, Ag, - MG is an element or a combination of elements selected from the following group: V, Nb, Ta, P, As, Sb, and/or - E is an element or a combination of elements selected from the following group: Eu, Ce, Pr, Nd, Sm, Tb, Dy, Ho, Er, Tm, Yb, Mn, Cr, Ni, Bi, Cu, Ag, Ti, U. 3. Phosphor (1) according to one of the preceding claims, wherein the phosphor has the empirical formula Li 8 MC[LiSi 4 N 4 O 8 ]:E. 4. Phosphor (1) according to one of the preceding claims, wherein a crystal structure of a host structure of the phosphor has at least one structural element selected from the following group: MA(N,O) 4 tetrahedron, MD(N,O) 4 tetrahedron, ME(N,O) 4 tetrahedron, MG(N,O) 4 tetrahedron. 5. Phosphor (1) according to one of the preceding claims, wherein in the crystal structure of the host structure of the phosphor MC and/or E are eight-fold coordinated. 6. Phosphor (1) according to one of the preceding claims, wherein MC is an element or a combination of elements selected from the group Gd, Dy, Ho, Pr, Nd, Y, Tb, Er, Tm, Lu, Sm and Yb. 7. Phosphor (1) of the 2023PF00709 July 1, 2024 P2023,0785 WO N - 166 - - an element or a combination of elements selected from the group of monovalent elements, - an element or a combination of elements selected from the group of trivalent elements, - an element or a combination of elements selected from the group of tetravalent elements, - oxygen and/or nitrogen, and - an activator element E. 8. Phosphor (1) according to one of the preceding claims, wherein the phosphor (1) has an emission spectrum with an emission maximum in the green to yellow range of the electromagnetic spectrum. 9. Phosphor (1) according to one of the preceding claims, wherein the phosphor (1) has an emission spectrum with an emission maximum in the near-infrared to infrared range of the electromagnetic spectrum. 10. Phosphor (1) according to one of the preceding claims, wherein the phosphor (1) has an emission spectrum with an emission maximum in the green to yellow range of the electromagnetic spectrum and with an emission maximum in the orange to red range and/or near infrared to infrared range of the electromagnetic spectrum. 11. Method for producing a phosphor (1) according to one of the preceding claims with the steps: - providing reactants, - mixing the reactants to form a reactant mixture, - heating the reactant mixture. 2023PF00709 July 1, 2024 P2023,0785 WO N - 167 - 12. A method for producing a phosphor (1) according to claim 11, wherein the heating takes place to a first temperature in the range between 700 °C and 1600 °C inclusive. 13. Use of the phosphor (1) according to one of claims 1 to 10 in a light source. 14. Optoelectronic component (10) with - a radiation-emitting semiconductor chip (11) and - a conversion element (12) with the phosphor (1) according to one of claims 1 to 10. 15. Optoelectronic component (10) according to claim 14, wherein the conversion element (12) has at least one further phosphor.

Description

2023PF00709 July 1, 2024 P2023,0785 WO N - 1 - Description PHONOGRAPH, METHOD FOR PRODUCING A PHONOGRAPH, USE OF A PHONOGRAPH, AND OPTOELECTRONIC COMPONENT A phosphor, a method for producing a phosphor, a use of a phosphor, and an optoelectronic component are described. One of the objects is to provide an improved phosphor. Furthermore, an efficient method for producing a phosphor is to be provided. In addition, a use and an efficient optoelectronic component are to be provided, each with the phosphor. A phosphor is specified. The phosphor can be uncharged on the outside. This means that there can be a complete charge balance between positive and negative charges in the phosphor on the outside. On the other hand, it is also possible that the phosphor does not formally have a complete charge balance to a small extent. With the stated compositions or molecular formulas, it is possible that the phosphor contains further elements, for example in the form of impurities. Taken together, the impurities amount to no more than 1 per mille, in particular no more than 100 ppm (parts per million), for example no more than 10 ppm. In particular, these impurities are present in a proportion of no more than 5 mol%, 2023PF00709 July 1, 2024 P2023,0785 WO N - 2 - in particular of at most 1 mol%, for example of at most 0.1 mol%, present in the phosphor. Here and below, phosphors are described using compositions or molecular formulas. The elements listed in the compositions or molecular formulas are present in charged form. Here and below, elements and/or atoms in relation to the compositions or molecular formulas of the phosphors thus mean ions in the form of cations and anions, even if this is not explicitly stated. This also applies to element symbols if, for the sake of clarity, they are mentioned without a charge number. According to at least one embodiment, the phosphor comprises an element or a combination of elements selected from the group of monovalent elements. The term "valence" in relation to a specific element means how many elements with a simple opposite charge are needed in a chemical compound to achieve charge balance. The term "valence" therefore includes the charge number of the element. Elements with a valence of one are called monovalent elements. Monovalent elements are often simply positively charged in chemical compounds and have a charge number of +1. Charge balancing in a chemical compound can, for example, take place via another element that is simply negatively charged. Monovalent elements are usually selected here 2023PF00709 July 1, 2024 P2023,0785 WO N - 3 - from the group formed by alkali elements and elements of the subgroups. According to at least one embodiment, the phosphor comprises an element or a combination of elements selected from the group of trivalent elements. Elements with a valence of three are referred to as trivalent elements. Trivalent elements are often three times positively charged in chemical compounds and have a charge number of +3. Charge equalization in a chemical compound can take place, for example, via three other elements, each of which is singly negatively charged, or another element that is three times negatively charged. Trivalent elements are generally selected from the group formed by elements of the subgroups, in particular the rare earth elements, and by elements of the 3rd main group. Here and in the following, rare earth elements are understood to mean the following elements: Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu. According to at least one embodiment, the phosphor comprises an element or a combination of elements selected from the group of tetravalent elements. Elements with a valence of four are referred to as tetravalent elements. Tetravalent elements are often four times positively charged in chemical compounds and have a charge number of +4. A charge balance in a chemical compound can be achieved, for example, via four additional elements, each of which is singly negatively charged, or two additional elements that are doubly negatively charged. 2023PF00709 July 1, 2024 P2023,0785 WO N - 4 - take place. Tetravalent elements are generally selected from the group formed by elements of the 4th main group and by elements of the subgroups. According to at least one embodiment, the phosphor comprises oxygen and/or nitrogen. In particular, the oxygen is doubly negatively charged. In particular, the nitrogen is triply negatively charged. Oxygen and/or nitrogen serve, for example, to balance the charge for the monovalent elements, the trivalent elements and the tetravalent elements. According to at least one embodiment, the phosphor comprises an activator element E. It is also possible for the phosphor to comprise a combination of activator elements. As a rule, the phosphor has a host structure into which foreign elements are introduced as an activator element. The activator element can absorb electromagnetic radiation of an excitati