Dichromatic fluorescent splicing color wheel: Enabling high-quality laser lighting on high thermal conductivity AlN substrate

doi:10.1016/j.jmst.2024.12.067

J. Mater. Sci. Technol. ›› 2025, Vol. 230: 129-138.DOI: 10.1016/j.jmst.2024.12.067

• Research Article • Previous Articles Next Articles

Dichromatic fluorescent splicing color wheel: Enabling high-quality laser lighting on high thermal conductivity AlN substrate

Yanrong Liang^a, Xiangjia Sun^a, Tongtong Zhu^a, Haitao Wang^a, Shuo Wang^a, Xiaojuan Liang^a,*, Weidong Xiang^a,*, Weiwei Huan^b,*, Jie Li^c,*, Junlong Wang^c,*

^aCollege of Chemistry and Materials Engineering, Wenzhou University, Wenzhou 325035, China;
^bCollege of Chemistry and Materials Engineering, Zhejiang A&F University, Hangzhou 311300, China;
^cCollege of Food and Health, Zhejiang A&FUniversity, Hangzhou 311300, China

Received:2024-09-26 Revised:2024-11-28 Accepted:2024-12-08 Published:2025-09-20 Online:2025-09-15
Contact: *E-mail addresses: lxj6126@126.com (X. Liang), wzuxwd001@126.com (W. Xiang), huanweiwei@zafu.edu.cn (W. Huan), lijie@zafu.edu.cn (J. Li), wangjunlong0804@aliyun.com (J. Wang)

Abstract

Abstract: In recent years, the development of solid-state lighting devices has increasingly shifted towards high-power laser illumination, making it imperative to develop fluorescent conversion materials with exceptional thermal stability and luminous quality. In this study, we introduced a highly reflective TiO₂ substrate in combination with a high thermal conductivity AlN substrate to design a Ce:YAG-PiG-TiO₂-AlN Film (Ce:YAG PTAF) color converter with outstanding photothermal performance. Remarkably, the thermal conductivity of this material reaches 48.28 W m^-1 K^-1. Notably, the optimized PTAF can withstand a high-power output of up to 12.14 W in a static environment, with a maximum luminous flux (LF_max) of 2284.6 lm and maximum luminous efficacy (LE_max) of 222.35 lm W^-1, showcasing its excellent optical properties. Furthermore, the fabricated Ce:YAG-PiG-TiO₂-AlN-Wheel (Ce:YAG PTAW), equipped with a motor operating at 7200 r/min, emits an extraordinary brightness of 4404 lm under 88 W of ultra-high laser irradiation, with stability surpassing that of commercial silicone color wheels, thanks to its superior Li₂O-Al₂O₃-SiO₂ (LAS) glass system. Interestingly, we designed an innovative spatially separated two-color segmented wheel structure, effectively mitigating the photon reabsorption phenomenon caused by the overlap of the fluorescent powder absorption peaks. When the ratio of Ce:YAG to Ce:GdYAG is 240:120, it yields white light with a color rendering index (CRI) of 80.2, and luminous flux remaining at 3317.8 lm. When encapsulated in a reflective module, it accurately reflects the true color states of objects. These results collectively indicate that both Ce:YAG PTAF and PTAW possess significant application potential in the realm of high-power laser illumination.

Key words: Ce:YAG, AlN substrate, Laser lighting, Dichromatic fluorescent splicing color wheel

Yanrong Liang, Xiangjia Sun, Tongtong Zhu, Haitao Wang, Shuo Wang, Xiaojuan Liang, Weidong Xiang, Weiwei Huan, Jie Li, Junlong Wang. Dichromatic fluorescent splicing color wheel: Enabling high-quality laser lighting on high thermal conductivity AlN substrate[J]. J. Mater. Sci. Technol., 2025, 230: 129-138.

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Dichromatic fluorescent splicing color wheel: Enabling high-quality laser lighting on high thermal conductivity AlN substrate

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