Ce:YAG/A12O3 composites for laser-excited solid-state white lighting
Abstract
A method for fabricating a composite useful in a white light emitting device, includes mixing a phosphor and a filler to form a mixture; sintering the mixture (e.g., using spark plasma sintering) to form a composite; and annealing the composite to reduce oxygen vacancies and improve optical properties of the composite. Also disclosed is a white light emitting device including a laser diode or light emitting diode optically pumping the phosphor in the composite to produce white light. The composite fabricated using the method (and having. e.g., at most 50% phosphor by weight) can (1) reduce an operating temperature of the phosphor by 55 degrees, (2) increase an external quantum efficiency (e.g., by at least 15%) of the white light emitting device, and (3) result in color points and quality of the white light that is equal to or improved, as compared to without the filler.
- Inventors:
- Issue Date:
- Research Org.:
- Univ. of California, Santa Barbara, CA (United States)
- Sponsoring Org.:
- USDOE Advanced Research Projects Agency - Energy (ARPA-E)
- OSTI Identifier:
- 1892749
- Patent Number(s):
- 11286419
- Application Number:
- 16/320,295
- Assignee:
- The Regents of the University of California (Oakland, CA)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA
C - CHEMISTRY C09 - DYES C09K - MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- DOE Contract Number:
- AR0000671
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 07/31/2017
- Country of Publication:
- United States
- Language:
- English
Citation Formats
Cozzan, Clayton J., DenBaars, Steven P., and Seshadri, Ram. Ce:YAG/A12O3 composites for laser-excited solid-state white lighting. United States: N. p., 2022.
Web.
Cozzan, Clayton J., DenBaars, Steven P., & Seshadri, Ram. Ce:YAG/A12O3 composites for laser-excited solid-state white lighting. United States.
Cozzan, Clayton J., DenBaars, Steven P., and Seshadri, Ram. Tue .
"Ce:YAG/A12O3 composites for laser-excited solid-state white lighting". United States. https://www.osti.gov/servlets/purl/1892749.
@article{osti_1892749,
title = {Ce:YAG/A12O3 composites for laser-excited solid-state white lighting},
author = {Cozzan, Clayton J. and DenBaars, Steven P. and Seshadri, Ram},
abstractNote = {A method for fabricating a composite useful in a white light emitting device, includes mixing a phosphor and a filler to form a mixture; sintering the mixture (e.g., using spark plasma sintering) to form a composite; and annealing the composite to reduce oxygen vacancies and improve optical properties of the composite. Also disclosed is a white light emitting device including a laser diode or light emitting diode optically pumping the phosphor in the composite to produce white light. The composite fabricated using the method (and having. e.g., at most 50% phosphor by weight) can (1) reduce an operating temperature of the phosphor by 55 degrees, (2) increase an external quantum efficiency (e.g., by at least 15%) of the white light emitting device, and (3) result in color points and quality of the white light that is equal to or improved, as compared to without the filler.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2022},
month = {3}
}
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