| 助熔剂NaF对YAG∶Ce荧光粉结构及发光性能影响 |
| Effect of NaF Flux on Structure and Luminescence of YAG∶Ce Phosphor |
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| 摘要: 利用化学共沉淀法，研究氟化钠助熔剂对YAG∶Ce荧光粉结构及发光性能影响。采用XRD分析不同含量氟化钠助熔剂的YAG晶相形成过程，通过SEM和荧光光谱研究氟化钠助熔剂对其发光和形貌影响规律。结果表明，含氟化钠助熔剂的YAG∶Ce荧光粉，合成温度可降低300 ℃，且不影响YAG晶相形成；随氟化钠添加量增加，荧光粉结晶度增加，发光强度增强；NaF添加量6%为最佳，其颗粒表面呈规则类球状，粒径1 μm左右，分布较均匀，氟化钠在荧光粉晶相形成过程中除具有助熔剂作用外，Na+还具有电荷补偿的作用；探讨氟化钠引起荧光粉光致发光峰蓝移的机理。 |
| 关键词: YAG∶Ce3+ 荧光粉 助熔剂 电荷补偿剂 |
| 基金项目: |
| Abstract: Spherical-like Y3Al5O12∶Ce(YAG∶Ce) phosphor powders with good photoluminescence intensities were prepared by co-precipitation containing NaF flux. XRD analysis shows that phase-pure phosphors can be obtained at temperatures about 1 100 ℃ and their crystallization enhance with increasing content of NaF flux. From SEM photographs, as-prepared particles are spherical-like shapes, narrow size distributions with mean size mostly at 1 μm. The optimal photoluminescence intensity of the YAG∶Ce phosphor powders were obtained on the condition of containing 6%NaF. Apart from being used as flux in process of phosphor synthesis, Na+ ion in NaF is also the charge compensator. In addition, mechanism of photoluminescence peak blue shift for YAG∶Ce phosphor caused by NaF flux is also discussed. |
| Keywords: YAG∶Ce3+ phosphor flux charge compensator |
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| 黎学明,孔令峰,李武林,杨文静.助熔剂NaF对YAG∶Ce荧光粉结构及发光性能影响[J].无机化学学报,2009,25(5):865-868. |
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