School of Materials Science and Engineering, Chonnam National University, Buk-gu, Gwangju 500-757, South Korea.
Opt Lett. 2013 Sep 1;38(17):3298-300. doi: 10.1364/OL.38.003298.
Potential white light-emitting diode (LED) phosphor SrGa2S4, which remains superfluous due to its unstable nature in the presence of moisture, was successfully integrated in a high-power white LED system by developing a glass-based phosphor plate. A glass system with softening temperature at around 600°C, which lies far below the possible decomposition temperature of the sulfide phosphor, provides a stable shield. Physical properties such as thermal stability, transparency, and lower porosity along with chemical stability under operating conditions of the LEDs ensure long-term operability. H2S emission due to the decomposition of sulfide phosphors, which leads to corrosion of LED electrodes, was contained using the developed plate. Higher thermal resistivity of the developed glass system in comparison with conventional resins ensures lower thermal quenching of the luminescence and better color purity.
潜在的白光发光二极管（LED）荧光粉 SrGa2S4 由于其在潮湿环境下的不稳定性而被多余，通过开发一种基于玻璃的荧光粉板，成功地集成到高功率白光 LED 系统中。软化温度在 600°C 左右的玻璃系统，远低于硫化物荧光粉可能的分解温度，提供了一个稳定的屏蔽。物理性质，如热稳定性、透明度和较低的孔隙率，以及在 LED 工作条件下的化学稳定性，确保了长期的可操作性。使用开发的板可以抑制由于硫化物荧光粉分解而导致的 H2S 排放，这会导致 LED 电极腐蚀。与传统树脂相比，开发的玻璃系统具有更高的热阻，确保了发光的热猝灭更低，颜色纯度更好。
