Patent · US Active

Stable red ceramic phosphors and technologies including the same

US10964853B2 · kind B2 · utility

0Cited by

1References

8Claims

0Family size

Assignee

Osram OLED GMBH · DE

Inventors

Yi Zheng · Lynnfield, US
Sonja Tragl · Augsburg, DE
Juliane Kechele · Stadtbergen, DE
Johanna Strube-Knyrim · Weil, DE
Madis Raukas · Boston, US
Stefan Lange · Shepperton, GB
Daniel Bichler · Augsburg, DE

Key dates

Filing date	Sep 19, 2016
Grant date	Mar 30, 2021
Priority date	—
Expiry date	Sep 17, 2037

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC09K11/77347
WIPO fieldBasic materials chemistry
WIPO sectorChemistry

Abstract

Wavelength converters including coarse particles/grains of a red nitride phosphor are disclosed. In some embodiments the red nitride phosphor is a (Ca,Sr,Ba)2Si5N8:Eu phosphor with a D50 grain size or a D50 particle size that is ≥5 microns. The red nitride phosphor may be encapsulated within an organic matrix or present in an inorganic matrix. In the latter case, the inorganic matrix may include fine grains with a D50 grain size <5 microns. Methods of making such wavelength converters and devices including such wavelength converters are also described.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.