发光学报Issue(12)：1402-1408,7.DOI:10.3788/fgxb20153612.1402
共沉淀法制备暖白光LED用Na2TiF6：Mn4+红色荧光粉及其发光性能研究
Co-precipitation Synthesis and Luminescence Properties of Na2 TiF6:Mn4+ Red Phosphors for Warm White Light Emitting Diodes
摘要
Abstract
Na2 TiF6∶Mn4+ red phosphors with different Mn4+ doping mole fraction were synthesized by the co-precipitation method. Structure, morphology, photoluminescence excitation and emission spectra as well as decay curve of Na2 TiF6∶ Mn4+ phosphors were studied by X-ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR) and fluorescence spectrometer. As-prepared Na2 TiF6∶ Mn4+phosphors have hexagonal structures. Under 460 nm excitation, intense red emissions corresponding to 2 Eg-4 A2 transitions of Mn4+ are ob-served. The optimum doping mole fraction of Mn4+ is 4. 77% and the quantum efficiency is 74% for this phosphor. The chromaticity coordinates of the Na2TiF6∶Mn4+phosphors are (0. 681, 0. 317). Decay curve of 2 Eg state for as-prepared Na2 TiF6∶Mn4+ sample fits the second order exponential be-havior, and the average lifetime is 3. 148 ms.关键词
Na2 TiF6∶Mn4+/红色荧光粉/白光LEDs/共沉淀法Key words
Na2 TiF6∶Mn4+/red phosphor/white LEDs/co-precipitation分类
数理科学引用本文复制引用
罗洋,江建青,侯得健,游维雄,叶信宇..共沉淀法制备暖白光LED用Na2TiF6：Mn4+红色荧光粉及其发光性能研究[J].发光学报,2015,(12):1402-1408,7.基金项目
江西省自然科学基金 （）
江西省高等学校科技落地计划 （）
江西省教育厅科学技术研究项目 （）
国家自然科学基金（51304086）资助项目 （）
