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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 Na2TiF6:Mn4+ Red Phosphors for Warm White Light Emitting Diodes
- 发光学报 2015年36卷第12期 页码：1402-1408
- 作者机构：
1. 江西理工大学 冶金与化学工程学院, 江西 赣州 341000
2. 国家离子型稀土资源高效开发利用工程技术研究中心, 江西 赣州 341000
- 作者简介：
- 基金信息：江西省自然科学基金(20132BAB206020)();江西省高等学校科技落地计划(KJLD14045)();江西省教育厅科学技术研究项目(GJJ14408)();国家
DOI：10.3788/fgxb20153612.1402
中图分类号： O482.31纸质出版日期：2015-12-10，
收稿日期：2015-9-10，
修回日期：2015-9-30，
扫 描 看 全 文
罗洋, 江建青, 侯得健等. 共沉淀法制备暖白光LED用Na<sub>2</sub>TiF<sub>6</sub>:Mn<sup>4+</sup>红色荧光粉及其发光性能研究[J]. 发光学报, 2015,36(12): 1402-1408
LUO Yang, JIANG Jian-qing, HOU De-jian etc. Co-precipitation Synthesis and Luminescence Properties of Na<sub>2</sub>TiF<sub>6</sub>:Mn<sup>4+ </sup>Red Phosphors for Warm White Light Emitting Diodes[J]. Chinese Journal of Luminescence, 2015,36(12): 1402-1408
罗洋, 江建青, 侯得健等. 共沉淀法制备暖白光LED用Na<sub>2</sub>TiF<sub>6</sub>:Mn<sup>4+</sup>红色荧光粉及其发光性能研究[J]. 发光学报, 2015,36(12): 1402-1408 DOI： 10.3788/fgxb20153612.1402.
LUO Yang, JIANG Jian-qing, HOU De-jian etc. Co-precipitation Synthesis and Luminescence Properties of Na<sub>2</sub>TiF<sub>6</sub>:Mn<sup>4+ </sup>Red Phosphors for Warm White Light Emitting Diodes[J]. Chinese Journal of Luminescence, 2015,36(12): 1402-1408 DOI： 10.3788/fgxb20153612.1402.
摘要
采用简便的共沉淀法制备了不同Mn
4+
掺杂摩尔分数的Na
2
TiF
6
:Mn
4+
红色荧光粉。通过X射线衍射仪、扫描电子显微镜、红外光谱仪、荧光光谱仪对荧光粉的结构、形貌、傅立叶红外光谱、激发和发射光谱及荧光寿命曲线进行了表征。结果表明
Mn
4+
的掺杂没有改变Na
2
TiF
6
的晶格结构
样品具有六方结构。Mn
4+
最佳掺杂摩尔分数为4.77%
量子效率为74%。在460 nm激发下
最强窄带发射峰位于628 nm处(
2
E
g
-
4
A
2
)
色坐标为(0.681
0.317)。
2
E
g
能级的荧光寿命曲线遵循双指数衰减
其荧光寿命值为3.148 ms。
Abstract
Na
2
TiF
6
:Mn
4+
red phosphors with different Mn
4+
doping mole fraction were synthesized by the co-precipitation method. Structure
morphology
photoluminescence excitation and emission spectra as well as decay curve of Na
2
TiF
6
:Mn
4+
phosphors were studied by X-ray diffraction (XRD)
scanning electron microscope (SEM)
Fourier transform infrared spectroscopy (FT-IR) and fluorescence spectrometer. As-prepared Na
2
TiF
6
:Mn
4+
phosphors have hexagonal structures. Under 460 nm excitation
intense red emissions corresponding to
2
E
g
-
4
A
2
transitions of Mn
4+
are observed. The optimum doping mole fraction of Mn
4+
is 4.77% and the quantum efficiency is 74% for this phosphor. The chromaticity coordinates of the Na
2
TiF
6
:Mn
4+
phosphors are (0.681
0.317). Decay curve of
2
E
g
state for as-prepared Na
2
TiF
6
:Mn
4+
sample fits the second order exponential behavior
and the average lifetime is 3.148 ms.
关键词
Na2TiF6:Mn4+红色荧光粉白光LEDs共沉淀法
Keywords
Na2TiF6:Mn4+red phosphorwhite LEDsco-precipitation
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