Laser-driven white lighting has been considered as a next-generation high-brightness white lighting source. Thermally stable color converter is an essential down-conversion material for phosphor-converted white laser diodes (pc-wLDs), which inevitably endures high-density laser excitation and huge heat shock from conversion loss. In this work, we proposed a thermally self-managing phosphor-in-glass (PiG) converter to enhance the heat dissipation of reflective pc-wLDs. The PiG converter was prepared by printing and sintering a phosphor glass film on the cold side of thermoelectric cooler (TEC). By controlling the input current of TEC, the heat generated from phosphors under high-power laser excitation was effectively and initiatively dissipated into the ambient environment due to the Peltier effect of TE materials. As the laser power (LP) increases from 0.73 to 5.6 W, the working temperature of PiG film slowly increases from 2.3°C to 6.1°C. The maximum temperature of PiG film is reduced by 61.1 °(~91%) at the LP of 5.6 W. Furthermore, the PiG-TEC-based pc-wLD achieves a cool white light and stable light quality under various LPs. At the LP of 4.5 W, the correlated color temperature (CCT) of pc-wLD is 6449 K, and the chromaticity coordinate of pc-wLD is (0.3139, 0.3274). The results indicate that the proposed PiG-TEC converter enhances the thermal performance of high-brightness laser-driven white lighting.

中文翻译：

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通过热自管理玻璃中磷光体增强磷光体转换的白色激光二极管的散热

激光驱动的白光照明被认为是下一代高亮度白光光源。热稳定颜色转换器是磷光转换白光激光二极管 (pc-wLD) 必不可少的下转换材料，它不可避免地要承受高密度激光激发和转换损耗带来的巨大热冲击。在这项工作中，我们提出了一种热自管理玻璃中荧光粉 (PiG) 转换器，以增强反射式 pc-wLD 的散热。PiG 转换器是通过在热电冷却器 (TEC) 的冷侧印刷和烧结磷光体玻璃膜来制备的。通过控制TEC的输入电流，由于TE材料的珀耳帖效应，荧光粉在高功率激光激发下产生的热量可以有效主动地散发到周围环境中。随着激光功率（LP）从 0.73 W 增加到 5.6 W，PiG 薄膜的工作温度从 2.3°C 缓慢增加到 6.1°C。PiG 薄膜的最高温度在 5.6 W 的 LP 下降低了 61.1°(~91%)。此外，基于 PiG-TEC 的 pc-wLD 在各种 LP 下实现了冷白光和稳定的光质量。在 4.5 W LP 下，pc-wLD 的相关色温 (CCT) 为 6449 K，pc-wLD 的色度坐标为 (0.3139, 0.3274)。结果表明，所提出的 PiG-TEC 转换器提高了高亮度激光驱动白光照明的热性能。基于 PiG-TEC 的 pc-wLD 在各种 LP 下实现了冷白光和稳定的光质量。在 4.5 W LP 下，pc-wLD 的相关色温 (CCT) 为 6449 K，pc-wLD 的色度坐标为 (0.3139, 0.3274)。结果表明，所提出的 PiG-TEC 转换器提高了高亮度激光驱动白光照明的热性能。基于 PiG-TEC 的 pc-wLD 在各种 LP 下实现了冷白光和稳定的光质量。在 4.5 W LP 下，pc-wLD 的相关色温 (CCT) 为 6449 K，pc-wLD 的色度坐标为 (0.3139, 0.3274)。结果表明，所提出的 PiG-TEC 转换器提高了高亮度激光驱动白光照明的热性能。