| 通过SiO2涂层改善BaSi2O2N2∶Eu2荧光粉的热性能 |
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| 引用本文： | 张云鹏,陈晓春,符义兵,梁超.通过SiO2涂层改善BaSi2O2N2∶Eu2荧光粉的热性能[J].人工晶体学报,2019,48(7):1247-1253. |
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| 作者姓名： | 张云鹏 陈晓春 符义兵 梁超 |
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| 作者单位： | 北京化工大学,北京,100029;江苏博睿光电有限公司,南京,241000 |
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| 摘 要： | 本文研究了SiO2涂层对BaSi2O2N2∶ Eu2蓝绿色荧光粉发光性能和热性能的影响.采用溶胶-凝胶法制备了SiO2包覆的BaSi2O2N2∶Eu2+蓝绿色荧光粉.实验结果表明,最佳镀膜量为6wt;,当镀膜量大于此值时,荧光粉亮度迅速降低.涂覆SiO2后,在150℃下BaSi2O2 N2∶Eu2荧光粉的热猝灭性能提高了2.4;,在500℃热降解后荧光粉的发光性能提高了15;.SiO2涂层显著提高了BaSi2O2N2∶Eu2+荧光粉的热稳定性.SiO2涂层的作用机理是在荧光粉表面和氧化气氛之间形成阻挡层,保护Eu2的发光中心在热加热过程中不被氧化.
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| 关 键 词： | LED照明 全光谱 BaSi2O2N2∶Eu2+ SiO2涂层 |
Improving the Thermal Properties of BaSi2O2N2 ∶Eu2 + Phosphor by SiO2 Coating |
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| ZHANG Yun-peng,CHEN Xiao-chun,FU Yi-bing,LIANG Chao.Improving the Thermal Properties of BaSi2O2N2 ∶Eu2 + Phosphor by SiO2 Coating[J].Journal of Synthetic Crystals,2019,48(7):1247-1253. |
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| Authors: | ZHANG Yun-peng CHEN Xiao-chun FU Yi-bing LIANG Chao |
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| Abstract: | In this paper,the effect of SiO2 coating on the luminescence and thermal properties of BaSi2O2N2∶ Eu2 + blue-green phosphors was investigated.The BaSi2O2N2 ∶ Eu2 + blue-green phosphor was coated with SiO2 by sol-gel method.The experimental results show that the optimal coating amount is 6wt;,the phosphor brightness is rapidly decrease when the amount larger than this value.After coating SiO2,the thermal quenching performance of BaSi2O2N2∶ Eu2+ phosphor at 150 ℃ was increased by 2.4;,and the luminescence performance of the phosphor after thermal degradation at 500 ℃ was increased by 15;.SiO2 coating significantly improves the thermal stability of BaSi2O2N2∶Eu2+ phosphors.The mechanism of SiO2 coating is that a blocking layer is formed between the surface of the phosphor and the oxidizing atmosphere protects the luminescent center of Eu2+ from being oxidizing during thermal heating. |
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