研究目的
Improving thermal uniformity in laser illuminations by optimizing phosphor model coupled with thermal and optical behavior and developing a ring-shaped phosphor convertor.
研究成果
The study concluded that a patterned phosphor concentration structure could lower the highest temperature of the phosphor layer (9.4% maximum) and the phosphor convertor with high-concentration center has more uniform heat distribution. The calculation and theory in this work may provide help to avoid thermal quenching in laser illumination.
研究不足
The design of the patterned concentration structure is preliminary and needs further investigation. The calculation and theory may provide help to avoid thermal quenching in laser illumination but require more detailed studies for optimization.
1：Experimental Design and Method Selection:
The study improved the current optical-thermal model by coupling the optical behavior of red (nitride)/yellow (YAG) phosphor and thermal conductivity of different hybrid particles concentrations.
2：Sample Selection and Data Sources:
High power laser diode (LD) with the central wavelength of 450 nm was used to activate the phosphor.
3：List of Experimental Equipment and Materials:
An IR camera (FLIR A6000 serious) for thermal measurement, integrating sphere with a diameter of
4：2 m connected with a spectroradiometer from Ocean Optics? for optical measurement. Experimental Procedures and Operational Workflow:
The thermal and optical measurements were conducted to evaluate the performance of the phosphor convertor.
5：Data Analysis Methods:
The study analyzed the thermal conductivity, thermal resistance, and heat generation of the phosphor layer, and the optical performance was evaluated through spectrum and chromatic coordinates distributions.
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