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首页> 外文期刊>Optical Materials >Design of laser-driven SiO_2-YAG:Ce composite thick film: Facile synthesis, robust thermal performance, and application in solid-state laser lighting
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Design of laser-driven SiO_2-YAG:Ce composite thick film: Facile synthesis, robust thermal performance, and application in solid-state laser lighting

机译：激光驱动的SiO_2-YAG：Ce复合厚膜设计：合成简便，鲁棒的热性能及其在固态激光照明中的应用

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摘要

In recent times, there have been rapid advances in the solid-state laser lighting technology. Due to the large amounts of heat accumulated from the high flux laser radiation, color conversion materials used in solid-state laser lighting devices should possess high durability, high thermal conductivity, and low thermal quenching. The aim of this study is to develop a thermally robust SiO2-YAG:Ce composite thick film (CTF) for high-power solid-state laser lighting applications. Commercial colloidal silica which was used as the source of SiO2, played the roles of an adhesive, a filler, and a protecting agent. Compared to the YAG:Ce powder, the CIF exhibits remarkable thermal stability (11.3% intensity drop at 200 degrees C) and durability (4.5% intensity drop after 1000 h, at 85 degrees C and 85% humidity). Furthermore, the effects of the substrate material and the thickness of the CTF on the laser lighting performance were investigated in terms of their thermal quenching and luminescence saturation behaviors, respectively. The CTF with a thickness of 50 mu m on a sapphire substrate does not show luminescence saturation, despite a high-power density of incident radiation i.e. 20 W/mm(2). These results demonstrate the potential applicability of the CTF in solid-state laser lighting devices. (C) 2017 Elsevier B.V. All rights reserved.
机译：近年来，固态激光照明技术得到了迅速的发展。由于高通量激光辐射会积聚大量热量，因此用于固态激光照明设备的颜色转换材料应具有较高的耐用性，较高的导热性和较低的热猝灭性。这项研究的目的是开发一种用于高功率固态激光照明应用的具有热稳定性的SiO2-YAG：Ce复合厚膜（CTF）。用作SiO2来源的市售胶体二氧化硅起着粘合剂，填料和保护剂的作用。与YAG：Ce粉末相比，CIF具有出色的热稳定性（在200摄氏度时强度下降11.3％）和耐久性（在85摄氏度和85％湿度下1000小时后强度下降4.5％）。此外，分别从基板材料和CTF的厚度对它们的热淬灭和发光饱和行为的角度研究了其对激光照明性能的影响。尽管入射辐射的功率密度很高，即20 W / mm（2），但在蓝宝石衬底上厚度为50μm的CTF并未显示出发光饱和。这些结果证明了CTF在固态激光照明设备中的潜在适用性。 （C）2017 Elsevier B.V.保留所有权利。

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