Title:
OXIDE PHOSPHOR, LIGHT EMITTING DEVICE, AND METHOD FOR PRODUCING OXIDE PHOSPHOR
Document Type and Number:
WIPO Patent Application WO/2022/137847
Kind Code:
A1
Abstract:
The present invention provides an oxide phosphor having an emission peak in a wavelength range from red light to near infrared light. Provided is an oxide phosphor having a composition that includes Ge, O (oxygen), Cr, at least one first element M1 selected from the group consisting of Li, Na, K, Rb, and Cs, and at least one second element M2 selected from the group consisting of Ca, Sr, Mg, Ba, and Zn, wherein, when the molar ratio of Ge in 1 mole of the composition of the oxide phosphor is 6, the molar ratio of the first element M1 is in the range of 1.5 to 2.5, the molar ratio of the second element M2 is in the range of 0.7 to 1.3, the molar ratio of O (oxygen) is in the range of 12.9 to 15.1, and the molar ratio of Cr is 0.2 or less, and the oxide phosphor has an emission peak wavelength in the range of 700 nm to 1050 nm in the emission spectrum thereof.
Inventors:
MURAZAKI YOSHINORI (JP)
Application Number:
PCT/JP2021/041001
Publication Date:
June 30, 2022
Filing Date:
November 08, 2021
Export Citation:
Assignee:
NICHIA CORP (JP)
International Classes:
C09K11/08; C09K11/61; C09K11/62; C09K11/64; C09K11/66; C09K11/67; C09K11/73; C09K11/80; H01L33/50
Domestic Patent References:
| WO2018207703A1 | 2018-11-15 |
Foreign References:
| CN110257064A | 2019-09-20 | |||
| CN111647404A | 2020-09-11 | |||
| JP2020188044A | 2020-11-19 | |||
| CN112111274A | 2020-12-22 | |||
| CN108467733A | 2018-08-31 | |||
| JP2018518046A | 2018-07-05 |
Attorney, Agent or Firm:
TAKEUCHI, ICHIZAWA & ASSOCIATES (JP)
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