Thermally robust and highly efficient green‐emitting luminescent ceramics are gradually attracting great attention as promising phosphors using in high‐brightness laser phosphor display to reduce serious speckle noise as well as high cost. However, lumen density is still seriously restricting their potential applications especially under high‐power density laser due to insufficient absorption of blue laser and significant thermal quenching. Here, we report an Al₂O₃‐LuAG: Ce composite ceramic phosphor (CCP) for high‐brightness laser phosphor display. Owing to good optical properties and high thermal conductivity of Al₂O₃, the Al₂O₃‐LuAG: Ce CCP shows high photoluminescence quantum yield (79.6%), low thermal quenching (only 3.2% loss in luminescence at 200°C), and high thermal conductivity (18.9 W·m⁻¹·K⁻¹). Moreover, the Al₂O₃, as scattering centers, enhances the Rayleigh–Mie scattering of the blue laser, and hence the absorption of the Al₂O₃‐LuAG: Ce CCP exhibits a remarkable improvement (~2.3 times) at 450 nm. Finally, with optimized thickness (0.3 mm) of Al₂O₃‐LuAG: Ce CCP, an excellent luminous efficiency (216 lm·W⁻¹) and outstanding lumen density (6129 lm·mm⁻²) of the green‐emitting light source was obtained by driving under a high‐power density (28.33 W·mm⁻²) blue laser. All of those validate the suitability of the Al₂O₃‐LuAG: Ce CCP for high‐brightness display.

中文翻译：

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Al2O3-LuAG的高流明密度：用于高亮度显示的Ce复合陶瓷

作为高亮度激光磷光体显示器中使用的有前途的磷光体，它可以减少严重的斑点噪声并提高成本，因此，耐热性强，高效的绿色发光陶瓷正逐渐引起人们的广泛关注。但是，由于蓝光吸收不足和明显的热猝灭，流明密度仍然严重限制了其潜在的应用，特别是在高功率密度激光器下。在这里，我们报告了用于高亮度激光荧光粉显示的Al ₂ O ₃ ‐LuAG：Ce复合陶瓷荧光粉（CCP）。由于Al ₂ O _3的良好的光学性能和高的导热性，所以Al ₂ O ₃－LuAG：Ce CCP表现出高的光致发光量子产率（79.6％），低的热猝灭（在200°C时只有3.2％的发光损失）和高的热导率（18.9 W·m ^-1 ·K ^-1）。此外，Al ₂ O ₃作为散射中心，增强了蓝色激光的瑞利-米氏散射，因此，Al ₂ O ₃ -LuAG：Ce CCP的吸收在450 nm处有显着改善（〜2.3倍） 。最后，通过优化厚度（0.3 mm）的Al ₂ O ₃ -LuAG：Ce CCP，具有出色的发光效率（216 lm·W ^-1）和出色的流明密度（6129 lm·mm ^-2））是通过在高功率密度（28.33 W·mm ^-2）的蓝色激光下驱动获得的。所有这些都证明了Al ₂ O ₃ -LuAG：Ce CCP适用于高亮度显示。