Origins of heat and luminous saturation in LuAG:Ce thin films for high-power laser lightingOA
The performance of high-power laser-driven lighting systems is fundamentally limited by an insufficient understanding of the mechanisms governing heat generation and luminous saturation in color-converting materials.In this study,Ce-doped Lu3Al5O12(LuAG:Ce)thin films synthesized through spray pyrolysis across a doping range of 0.1-4.0 mol% are systematically investigated to elucidate these effects.Heat generation,resulting from the Stokes shift,is found to scale with both Ce concentration and excitation power density,emerging as a critical factor that constrains luminescence output.At an optimized doping level of 2.5 mol%Ce,the films achieve a luminous flux of 1618.3 lm and exhibit a saturation threshold of 28 W·mm^(-2)under ambient conditions.Incorporation of water cooling reduces the local laser spot temperature by approximately 42.3℃ at the same excitation intensity,effectively raising the saturation threshold to 32 W·mm^(-2)and increasing luminous flux to 1938.6 lm,representing a 19.8% enhancement.These results demonstrate that nonradiative transitions,arising from thermal quenching,lead to luminous saturation.Collectively,this study clarifies the origins of heat generation and luminous saturation in LuAG:Ce films under high-power laser excitation and underscores the critical roles of Ce doping optimization and heat dissipation in enhancing solid-state lighting performance.
Bingguo Xue;Shaohong Liu;Huiying Hu;Limin Zhou;Hao Cui;Hongying Pei;Wenyan Zhou;Manmen Liu;Haigang Dong;Ming Wen;Li Chen;Wei Wang;Song Li;Liang Zuo
School of Materials Science and Engineering,Northeastern University,Shenyang 110819,ChinaSchool of Materials Science and Engineering,Northeastern University,Shenyang 110819,China State Key Laboratory of Precious Metal Functional Materials,Yunnan Precious Metals Laboratory Co.,Ltd.,Kunming 650106,ChinaSchool of Materials Science and Engineering,Northeastern University,Shenyang 110819,ChinaState Key Laboratory of Precious Metal Functional Materials,Yunnan Precious Metals Laboratory Co.,Ltd.,Kunming 650106,ChinaState Key Laboratory of Precious Metal Functional Materials,Yunnan Precious Metals Laboratory Co.,Ltd.,Kunming 650106,ChinaSino-Platinum Metals Semiconductor Materials(Yunnan)Co.,Ltd.,Kunming 650106,ChinaSino-Platinum Metals Semiconductor Materials(Yunnan)Co.,Ltd.,Kunming 650106,ChinaState Key Laboratory of Precious Metal Functional Materials,Yunnan Precious Metals Laboratory Co.,Ltd.,Kunming 650106,China Sino-Platinum Metals Semiconductor Materials(Yunnan)Co.,Ltd.,Kunming 650106,ChinaState Key Laboratory of Precious Metal Functional Materials,Yunnan Precious Metals Laboratory Co.,Ltd.,Kunming 650106,ChinaState Key Laboratory of Precious Metal Functional Materials,Yunnan Precious Metals Laboratory Co.,Ltd.,Kunming 650106,ChinaState Key Laboratory of Precious Metal Functional Materials,Yunnan Precious Metals Laboratory Co.,Ltd.,Kunming 650106,ChinaSchool of Materials Science and Engineering,Northeastern University,Shenyang 110819,ChinaSchool of Materials Science and Engineering,Northeastern University,Shenyang 110819,ChinaSchool of Materials Science and Engineering,Northeastern University,Shenyang 110819,China
通用工业技术
laser-driven lightingLu3Al5O12(LuAG:Ce)thin filmspray pyrolysisheat generationluminous saturation
《Journal of Advanced Ceramics》 2026 (2)
P.197-210,14
supported by the National Natural Science Foundation of China(Nos.51977027 and 51967008)the Natural Science Foundation of Liaoning Province(No.2025-MS-038)the Scientific and Technological Project of Yunnan Precious Metals Laboratory(Nos.YPML-2023050250,YPML-2022050206,YPML-20240502061,YPML-20240502062,and YPML20240502091).
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