JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
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2025
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IF 14.3
Yanrong Liang,Xiangjia Sun,Tongtong Zhu,Haitao Wang,Shuo Wang,Xiaojuan Liang,Weidong Xiang,Weiwei Huan,Jie Li,Junlong Wang
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 TiO 2 substrate in combination with a high thermal conductivity AlN substrate to design a Ce:YAG-PiG-TiO 2 -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-TiO 2 -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 Li 2 O-Al 2 O 3 -SiO 2 (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.
研究领域:
光学材料
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固态照明
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热管理技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
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IF 5.1
Xidong Wang,Yanrong Liang,Jiawei Liu,Qianxiong Wen,Cong Zhao,Xiaojuan Liang,Zhaopin Chen,Weidong Xiang
Phosphors in glass films (PiFs) is considered ideal conversion materials for laser lighting, but heat dissipation issue is the main challenge limiting its development. Therefore, it is urgent to find more excellent heat dissipation materials. Herein, we proposed to use AlN with high thermal conductivity as the substrate, and innovatively introduced TiO 2 coating to improve the interface reflection ability and solve the possible problems of shedding and cracking. After a series of optimizations, the LSN PiG-TiO 2 -AlN (PTA) color converter obtained a high thermal conductivity of 29W m −1 k −1 and a low surface temperature. At an input power of 5.2W, the luminous efficiency can reach 175 lm/W and the relative initial intensity can still be maintained by 95.3% at 200 °C. Benefiting from the extremely strong heat dissipation capacity of the AlN substrate, the LSN PTA color converter maintains its relative luminous intensity at 95 % of the initial intensity after 24 h of continuous illumination, which is the best value recorded so far. In addition, LSN PTA is combined with CaAlSiN 3 :Eu 2+ phosphor to achieve high-quality white light with a CRI of 82.5. The above results indicate that LSN PiG-TiO 2 -AlN color converters have a promising research prospect in the field of laser lighting.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
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2023
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IF 4.9
Qianxiong Wen,Cong Zhao,Meilin Fu,Yusai Xu,Xiangjia Sun,Jiaying Zheng,Yanrong Liang,Weidong Xiang,Xiaojuan Liang,Zhaoping Chen
Phosphor-in-glass (PiG) has been prepared into various types of phosphor films owing to its simplicity process, exceptional color purity, and convenient color adjustability. Nevertheless, existing reflective PiGs films have encountered limitations in terms of stability and feasibility as reliable color converters, mainly attributed to issues related to thermal deposition and insufficient optical efficiency. Herein, we propose to use AlN substrate with superior thermal conductivity to coat the TiO 2 layer to obtain TiO 2 –AlN (TA), which enhances the reflectivity of blue light to facilitate the light conversion process. By incorporating highly thermally stable LuAG:Ce-PiGs on a TA substrate, the LuAG:Ce-PiTA converter exhibits a luminous flux of 1102 lm@6.4 W, and maintains a relative intensity of 94.6% at 473 K benefiting from the high thermal conductivity of 34.1 W/(m·K). The addition of CASN 3 :Eu to the color converter 50 L&10C-PiTA enables an impressive CRI of 90.7. Relative luminescence intensities of LuAG:Ce-PiTA and 50 L&10C-PiTA only decrease by 5.35% and 3.28%, respectively, in the 24 h illumination aging decay test of the reflective laser module. The results confirm the suitability of the optimally designed TA substrate for LuAG:Ce color converter applications in high-power reflective laser illumination.
研究领域:
材料科学
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光学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
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2025
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IF 5.6
Gaohong Wu,Xiangjia Sun,Yanrong Liang,Jiaying Zheng,Yulan Xie,Zhaoping Chen,Jian Xu,Weidong Xiang,Xiaojuan Liang
To address the thermal management challenge in phosphor-in-glass (PiG) materials for laser lighting due to low glass matrix thermal conductivity, this study developed YAG:Ce 3+ -Al 2 O 3 PiG composites reinforced with Al 2 O 3 particles, achieving a thermal conductivity of 78.6 W/(m·K). A TiO 2 reflective layer optimized for reflection and light conversion was introduced between the AlN substrate and PiG layer. Systematic optimization of Al 2 O 3 content and preparation conditions yielded YAG:Ce 3+ -Al 2 O 3 PiG composites with exceptional performance: maximum luminous flux (LF) of 2515 lm under blue laser excitation, saturation threshold (ST) of 27.57 W/mm 2 , and luminous efficiency (LE) of 174.7 lm/W. LF and ST increased by 184.5 % and 167.4 %, respectively, compared to non-Al 2 O 3 counterparts. The surface temperature of 9 wt% Al 2 O 3 PiG reached 363.85 K, 34.4 % lower than the working temperature of the sample without Al 2 O 3 addition. Stable light emission and high photothermal stability confirm its potential as a high-brightness laser lighting material.
研究领域:
材料科学
·
光学工程
·
热管理
·
固态照明
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）