A facile method to synthesize red phosphor K2TiF6:Mn4 with high luminescence efficiency
A facile method to synthesize red phosphor K2TiF6:Mn4 with high luminescence efficiency
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一种简便合成高发光效率红色荧光粉K2TiF6:Mn4的方法
DOI：
10.1007/s10854-019-02260-6
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发表时间：
2019
期刊：
影响因子：
--
通讯作者：
Wang Zhengliang
中科院分区：
文献类型：
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作者：
Yang Juan;Wang Qin;Zhuang Jingru;He Pei;Teng Mingyu;Wang Zhengliang
在本工作中，用H2O代替剧毒的Hf作为溶剂，在室温下用一种简便的方法制备了K2TiF6：Mn4+红色荧光粉。用X射线衍射仪和扫描电子显微镜对其结构和形貌进行了表征。得到的K2Ti0.96F6：0.04Mn4+在蓝光区有较强的激发带，窄带发射具有较高的色纯度。用商品Y3Al5O12：Ce3+和K2Ti0.96F6：0.04Mn4+制备的白色发光二极管具有优异的光电性能(显色指数88.4K，色温4138K，发光效率178.5 lm/W)。因此，这种合成荧光粉可以在WLED上找到应用。
In current work, a red-emitting phosphor K2TiF6:Mn4+was prepared by a facile method using H2O to replace high toxic HF as solvent at room temperature. Its structure and morphology were characterized by the XRD and SEM measurement. The obtained K2Ti0.96F6:0.04Mn4+presents intense excitation band in the blue-light region and narrow-band emission with high color purity. Meanwhile, this sample is of the excellent thermal-quenching resistance and its emission intensity at 160 °C is still higher than that at 20 °C. The white light-emitting diode (wLED) fabricated with the commercial Y3Al5O12:Ce3+and K2Ti0.96F6:0.04Mn4+shows excellent photoelectric performances (the color rendering index of 88.4, the color temperature of 4138 K, and the luminous efficiency of 178.5 lm/W). So this as-synthesized phosphor may be find application on wLEDs.