表面活性剂后处理对 YAG：Ce3+荧光粉发光特性的影响

摘要

采用固相法制备 YAG： Ce3+黄色荧光粉，以油酸、聚乙二醇、十二烷基磺酸钠和十二烷基硫酸钠等表面活性剂作为后处理剂，考察其种类、浓度和性质等对荧光粉发光性能的影响，进一步对浸泡温度以及浸泡时间等工艺条件进行了对比研究，并通过荧光光谱和扫描电子显微镜等手段对处理前后 YAG： Ce3+荧光粉的发光性能、表面形貌和老化性能等方面进行了表征和分析。结果表明，YAG： Ce3+荧光粉的最佳后处理工艺条件为：十二烷基硫酸钠较为理想，经2.4％十二烷基硫酸钠处理后，YAG： Ce3+荧光粉的发光强度约提高8.4％，浸泡温度为50℃，浸泡时间为60 min。%YAG: Ce3 + Yellow phosphors prepared by solid-state method. Several kinds of surfactants,such as,oleic acid,polyethylene glycol,sodium dodecyl sulfonate and sodium dodecyl sulfate are selected as post-processing reagent. Influence of the kinds and concentration of the post-processing reagent solution, the soaking temperature and soaking time on the PL intensity of YAG: Ce3 + were investigated. Fluores-cence spectrometer,and scanning electron microscopy( SEM),etc. techniques are used to examine the properties of the post-treatment YAG: Ce3 + . The results showed that the optimum conditions were:after 2. 4% sodium dodecyl sulfate post-treatment,PL intensity of the YAG: Ce3 + phosphors are improved obvi-ously to 8. 4% ,the soaking temperature and soaking time is 60 min and 50 ℃.