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采用高分子网络凝胶法,在较低温度下制备了YAG:Er~(3+)纳米晶粉体.分别用热重-差热分析(TG-DSC)、X射线衍射(XRD)、扫描电子显微镜(SEM)以及激发和发射光谱对样品进行了表征.结果表明:石榴石晶相的形成温度为880℃,与YAG纳米晶粉体相比,用Er~(3+)代替Y~(3+)后,YAG:Er~(3+)纳米晶粉体还是以石榴石晶相为主,未发生明显变化;YAG:Er3~(3+)纳米晶粉体有丰富的吸收谱线,并且在260nm激发光激发下YAG:Er~(3+)纳米晶粉体可以发射出377nm紫光,可以作为紫光光源的考虑对象. 相似文献
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A new self-adaptive phosphor coating technology has been successfully developed,which adopted a slurry method combined with a self-exposure process.A phosphor suspension in the water-soluble photoresist was applied and exposed to LED blue light itself and developed to form a conformal phosphor coating with self-adaptability to the angular distribution of intensity of blue light and better-performing spatial color uniformity.The self-adaptive phosphor coating technology had been successfully adopted in the wafer surface to realize a waferlevel scale phosphor conformal coating.The first-stage experiments show satisfying results and give an adequate demonstration of the flexibility of self-adaptive coating technology on application of WLSCP. 相似文献