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LaPO4∶Ce3+,Tb3+荧光屏的制备及表征

DOI: 10.7521/j.issn.0454-5648.2014.06.10

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Abstract:

采用重力沉积法在石英基片上涂敷LaPO4∶Ce3+,Tb3+荧光粉制备了LaPO4∶Ce3+,Tb3+荧光屏。通过X射线衍射仪、扫描电子显微镜(SEM)和荧光分光光度计对荧光屏进行表征,研究了黏结剂、电解质、荧光粉的用量对荧光屏性能的影响。结果表明调整黏结剂、电解质的用量可制备荧光粉和基片结合良好的荧光屏,荧光屏的主晶相仍为LaPO4。SEM分析表明荧光涂层致密、均匀,厚度约为40μm。荧光光谱分析表明,在200~300nm紫外光激发下可发射主发射峰为543nm的绿色荧光。随黏结剂用量的增加,发光强度先增大后减小,性能最佳的黏结剂体积浓度为3%;随电解质用量的增加,发射光强度先增高后降低,当其质量分数为0.01%时,发光强度最大;随着荧光粉用量的增加,透过荧光屏的发射光强度降低。

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