Preparation and luminescent performances of thermally stable redemitting phosphor-in-glass for high-power lighting
Preparation and luminescent performances of thermally stable redemitting phosphor-in-glass for high-power lighting
复制标题
高功率照明用热稳定玻璃红光荧光粉的制备及其发光性能
DOI：
10.1016/j.jallcom.2018.07.052
复制
发表时间：
2018
影响因子：
6.2
通讯作者：
Luo Xiaobing
中科院分区：
文献类型：
--
作者：
Peng Yang;Mou Yun;Zhuo Yong;Li Hong;Wang Xinzhong;Chen Mingxiang;Luo Xiaobing
玻璃内磷（PiG）已成为大功率发光二极管（led）的一种很有前途的无树脂颜色转换器。然而，由于红光发射光谱的不足，其发光性能仍然面临挑战。在碲酸盐玻璃基体中引入3.5MgO·0.5MgF2·GeO2:Mn4+(MFG:Mn4+)荧光粉颗粒，制备出稳定的大功率发光猪。研究了制备猪的显微结构和发光性能。将制备的猪基发光二极管与紫外（UV） led芯片结合制成猪基发光二极管，并通过改变荧光粉含量来调节其光学性能。因此，引入的荧光粉晶体在烧结过程中具有化学稳定性，并在玻璃基体中保持完整。随着荧光粉含量的增加，红光发射强度增大。此外，制备的PiG能减弱MFG:Mn4+荧光粉的热猝灭，在高温下表现出良好的热稳定性。结果表明，所制备的PiG是一种稳定、高效的大功率照明发红变换器。
Phosphor-in-glass (PiG) has become as a promising resin-free color converter for high-power light-emitting diodes (LEDs). However, the challenge in luminescent performances of PiG still remain due to the deficiency of red emission spectrum. Herein, a stable red-emitting PiG was prepared for high-power lighting by introducing 3.5MgO·0.5MgF2·GeO2:Mn4+(MFG:Mn4+) phosphor particles into a tellurite glass matrix. The microstructures and luminescent performances of prepared PiGs were investigated. PiG-based LEDs were fabricated by combining the prepared PiGs and ultraviolet (UV)-LED chips and their optical performances were adjusted by altering phosphor content. Consequently, the introduced phosphor crystals are chemically stable under sintering process and maintain intact in the glass matrix. With the increase of phosphor content, the red emission intensity is increased. Furthermore, the prepared PiG weakens the thermal quenching of MFG:Mn4+phosphor and exhibits excellent thermal stability under high temperature operation. The results demonstrate that the prepared PiG is a stable and efficient red-emitting converter for high-power lighting.