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1μm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。
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.
出处
《无机化学学报》
SCIE
CAS
CSCD
北大核心
2009年第5期865-868,共4页
Chinese Journal of Inorganic Chemistry
基金
国家自然科学基金资助项目(No.10476035)
重庆市自然科学基金重点资助项目(No.2005BA4016)
