β-SiAlON:Eu2+ Phosphor-in-Glass Film: An Efficient Laser-Driven Color Converter for High-Brightness Wide-Color-Gamut Projection Displays,Laser & Photonics Reviews

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β-SiAlON:Eu2+ Phosphor-in-Glass Film: An Efficient Laser-Driven Color Converter for High-Brightness Wide-Color-Gamut Projection Displays
Laser & Photonics Reviews ( IF 9.8 ) Pub Date : 2021-09-23 , DOI: 10.1002/lpor.202100317
Xiangming Yue ₁ , Ju Xu _{1,

2} , Hang Lin _{1,

2} , Shisheng Lin ₁ , Renfu Li ₁ , Bo Wang ₃ , Qiugui Huang ₄ , Pengfei Wang ₄ , Ping Sui ₄ , Yao Cheng _{1,

2} , Yuansheng Wang _{1,

2}

Affiliation

The green-emissive laser phosphor is urgently demanded for projection displays to compensate the “Green Gap.” Herein, the well-known β-SiAlON:Eu²⁺ with admirable luminescent feature is incorporated into robust silicate glass matrix, cosintered on sapphire plate, and then constructed into “phosphor wheel,” succeeding in retaining excellent green-emissive performance and meanwhile relieving the luminescence droop at high pumping density of blue laser. Probing the local effect of laser–matter interaction reveals that the luminescence saturation is majorly determined by thermal quenching, but the influence of intensity quenching cannot be ignored. Systematical works are performed to optimize glass composition, cosintering procedure, sample parameters, and optical path, turning out the maximal quantum efficiency of 60%, thermal conductivity of 9.5 W m⁻¹ K⁻¹, and high saturation threshold far beyond 22 W mm⁻². In a proof-of-concept experiment, accompanied with red laser diode, the constructed light engine yields a high brightness with luminous flux of 1310 lm (luminance of 880 Mcd m⁻²), a low étendue of ≈1.5 mm², and a wide color gamut of 112.5% National Television System Committee (NTSC), demonstrating the composite material as an efficient laser-driven color converter for projection displays.

中文翻译：

β-SiAlON:Eu2+ 玻璃内磷膜：一种用于高亮度广色域投影显示器的高效激光驱动色彩转换器

投影显示迫切需要绿色发射激光荧光粉来补偿“绿色差距”。这里，众所周知的 β-SiAlON:Eu ²⁺具有令人赞叹的发光特性的硅酸盐玻璃基体加入坚固的硅酸盐玻璃基体，共烧结在蓝宝石板上，然后构造成“磷光轮”，成功地保持了出色的绿色发射性能，同时缓解了蓝色激光在高泵浦密度下的发光下降。探索激光-物质相互作用的局部效应表明，发光饱和度主要由热猝灭决定，但强度猝灭的影响不容忽视。进行系统的工作以优化玻璃成分、共烧结程序、样品参数和光路，结果最大量子效率为 60%，热导率为 9.5 W m ^-1 K ^-1，饱和阈值远超过 22 W mm ⁻². 在概念验证实验中，配合红色激光二极管，构建的光引擎产生高亮度，光通量为 1310 lm（亮度为 880 Mcd m ^-2），折射率低 ≈1.5 mm ²，以及112.5% 国家电视系统委员会 (NTSC) 的宽色域，证明该复合材料是一种用于投影显示的高效激光驱动色彩转换器。

更新日期：2021-11-11

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