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Ce:YAG/Al2O3 COMPOSITES FOR LASER-EXCITED SOLID-STATE WHITE LIGHTING
Ce:YAG/Al2O3 COMPOSITES FOR LASER-EXCITED SOLID-STATE WHITE LIGHTING
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机译:Ce:YAG / Al 2 Sub> O 3 Sub>复合材料用于激光激发固态白光
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摘要
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.
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