Sol–gel composition of multicomponent hybrid precursors to long afterglow of Ca_xSr_1 − xAl₂O₄: Eu²⁺ phosphors

详细信息	查看全文 | 推荐本文 |

• 作者：Bing Yan ; Junjie Wu
• 关键词：Sol– ; gel preparation ; Luminescence ; Long afterglow ; Hybrid precursors
• 刊名：Materials Letters
• 出版年：2007
• 期刊代码：59_0167577x
• 类别：ms
• 出版时间：October 2007
• 卷：61
• 期：26
• 页码：4851-4853
• 文件大小：318 K

摘要

Ca_xSr_{1 − x}Al₂O₄: Eu²⁺ photoluminescent materials with high brightness and long afterglow were in situ synthesized by hybrid precursor assembly sol–gel technology in a reductive atmosphere. The particle size of luminescent materials is in the range of 30–60 nm by the estimation of XRD. And SEM shows that there exists uniform morphology and microstructure owing to the hybrid precursors. The influence of co-doping Ca²⁺ and Sr²⁺ on the luminescence of the phosphor was studied. Their excitation and emission spectra were very similar to that of SrAl₂O₄: Eu²⁺ phosphors and all of them have long afterglow phenomenon. Changing the co-doping concentrations of Ca²⁺ and Sr²⁺ in Ca_xSr_{1 − x}Al₂O₄: Eu²⁺ phosphors, the luminescent intensities are different. When the proportion of Ca and Sr is 6 to 4, the phosphor reaches the strongest emitting intensity.