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Unique sandwich design of high-efficiency heat-conducting phosphor-in-glass film for high-quality laser-driven white lighting

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Journal of Advanced Ceramics 2022年第12期11卷 1889-1900页

作者： Yang PENG Zikang YU Jiuzhou ZHAO Qing WANG Jiaxin LIU Bo SUN Yun MOU Mingxiang CHEN School of Aerospace Engineering Huazhong University of Science and TechnologyWuhan 430074China School of Mechanical Science and Engineering Huazhong University of Science and TechnologyWuhan 430074China

Multi-color phosphor-in-glass(PiG)film has been considered as a promising color converter in high-quality laser lighting owing to its outstanding merits of phosphor versatility,tunable luminescence,and simple ***,the opto-thermal properties of PiG film are severely affected by the photon reabsorption and backward scattering of phosphor structure and the heat conduction of ***,a unique sandwich design of phosphor structure was introduced in the multi-color PiG film for high-quality laser *** elaborately synthesizing the borosilicate glass with low glass transition temperature(T_(g)),similar expansion coefficient,and high refractive index(RI),the sandwiched PiGs were prepared by sintering(~600℃)broadband green and red phosphor glass films on the double sides of *** green and red PiG films were tightly coated on the sapphire with no delamination and maintained higher luminescence intensity than raw phosphors at high *** simultaneously coupling photon reabsorption and backward scattering,the sandwiched green PiG film-sapphire-red PiG film(G-S-R PiG)yields a high-quality white light with a high luminous efficacy of 163 lm/W and an excellent color rendering index(CRI)of 85.4 under a laser power of 2.4 W,which are the best comprehensive results yet *** from the ingenious sandwich design with heat-conducting sapphire and thin PiG films,the G-S-R PiG displays low working temperatures(laser *** work reveals the role of sandwiched phosphor structure in photon loss and heat dissipation,which provides a new strategy to design PiG films for high-quality laser lighting.

关键词： laser-driven lighting phosphor-in-glass(PiG)film sandwich structure color quality heat dissipation

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Patterned phosphor-in-glass films with efficient thermal management for high-power laser projection displays

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Journal of Advanced Ceramics 2023年第11期12卷 2075-2086页

作者： Zezhong Yang Song Zheng Guoyu Xi Tao Pang Shaoxiong Wang Qingying Ye Bin Zhuang Daqin Chen College of Physics and Energy Fujian Provincial Key Laboratory of Quantum Manipulation and New Energy MaterialsFujian Normal UniversityFuzhou 350117China Huzhou Key Laboratory of Materials for Energy Conversion and Storage College of ScienceHuzhou UniversityHuzhou 313000China Fujian Provincial Collaborative Innovation Center for Advanced High-Field Superconducting Materials and Engineering Fujian Normal UniversityFuzhou 350117China Fujian Provincial Engineering Technology Research Center of Solar Energy Conversion and Energy Storage Fujian Normal UniversityFuzhou 350117China

Recently,high-performance color converters excitable by blue laser diode(LD)have sprung up for projection ***,the thermal accumulation effect of the color converters is a non-negligible problem under high-power LD ***,we developed novel opto-functional composites(patterned CaAlSiN3:Eu^(2+)phosphor-in-glass film–Y_(3)Al_(5)O_(12):Ce^(3+)phosphor-in-glass film@Al_(2)O_(3)plate with aluminum"heat sink")via a thermal management methodology of combining"phosphor wheel"and"heat sink"for a lighting source of highpower laser projection *** new composite design makes it effective to transport generated thermal phonons away to reduce the thermal ionization process,and to yield stable and high-quality white light with brightness of 4510 lm@43 W,luminous efficacy of 105 lm/W,correlated color temperature of 3541 K,and color rendering index of ***,the phosphor-in-glass film-converted laser projection system was also successfully designed,showing a more vivid color effect compared to a traditional LED-based *** work emphasizes the importance of the thermal management upon high-power laser irradiation,and hopefully facilitates the development of a new LD-driven lighting source for high-power laser projection displays.

关键词： phosphor-in-glass(PiG)film laser-driven lighting luminescent materials heat dissipation glass ceramics

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