Nanomaterials and Chemistry Key Laboratory, Faculty of Chemistry and Materials Engineering, Wenzhou University, Zhejiang Province, Wenzhou 325027, P. R. China.
MOE Key Laboratory of Bioinorganic and Synthetic Chemistry/School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou 510275, P. R. China.
Dalton Trans. 2018 Oct 7;47(37):12944-12950. doi: 10.1039/c8dt02818d. Epub 2018 Aug 23.
Red phosphors composed of Mn-activated complex fluorides have attracted considerable attention for applications in warm white light-emitting diodes (WLEDs). In the present study, we report a facile strategy to synthesize a novel red phosphor LiSrGaF:Mn (LSGF:Mn) at room temperature, and we also discuss its formation mechanism. Mn ions occupy Ga sites located at the centers of distorted [GaF] octahedrons and emit intense red luminescence when excited by UV or blue light. The effects of synthesis conditions such as the type of strontium salts, the concentrations of KMnF and NH·HO, and the reaction temperature have been investigated. The luminescence intensity of the phosphor LSGF:Mn has been improved by optimizing the synthetic parameters. The as-prepared phosphor LSGF:Mn exhibits broad and intense absorption in the blue region and bright luminescence in the red region, which indicate that it is promising for applications in warm WLEDs.
基于锰激活的复杂氟化物的红色荧光粉因其在暖白光发光二极管（WLED）中的应用而受到广泛关注。在本研究中，我们报道了一种在室温下合成新型红色荧光粉 LiSrGaF:Mn（LSGF:Mn）的简便策略，并讨论了其形成机制。Mn 离子占据位于扭曲的[GaF]八面体中心的 Ga 位，在紫外光或蓝光激发下发射出强的红光。我们研究了合成条件（如锶盐的类型、KMnF 和 NH·HO 的浓度以及反应温度）对其的影响。通过优化合成参数，提高了荧光粉 LSGF:Mn 的发光强度。所制备的 LSGF:Mn 荧光粉在蓝色区域具有宽而强的吸收，在红色区域具有明亮的发光，表明其在暖 WLED 中有应用前景。
