The yellow-to-blue intensity ratio (Y/B) of Dy3+ emission
The yellow-to-blue intensity ratio (Y/B) of Dy3+ emission
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DOI：
10.1016/0925-8388(93)90174-l
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发表时间：
1993-02
影响因子：
6.2
通讯作者：
Q. Su;Z. Pei;L. Chi;Hongjie Zhang;Zhong L. Zhang;Feng Zou
中科院分区：
文献类型：
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作者：
Q. Su;Z. Pei;L. Chi;Hongjie Zhang;Zhong L. Zhang;Feng Zou
制备了各种硼酸盐、钒酸盐、铌酸盐、锑酸盐、钛酸盐、锆酸盐和掺杂Dy3+的CaS。报告了影响 Dy3+ 发射的黄蓝强度比 (Y/B) 的因素。Y/B 随着复合氧化物 Dy-O-M 中相邻元素 M 的 Z/ror 电负性降低而增加。 Dy3+和O2−之间的共价程度越大，Y/Bis就越大。当Dy3+位于反中心且高度对称的位点时，Dy3+不发光。看来，位于偏离逆中心位点的 Dy3+ 的 Y/B 大于位于无逆中心位点的 Dy3+ 的 Y/B。当 Dy3+ 替换为同价元素时，Y/B 随 Dy3+ 浓度的变化变化不大，但当 Dy3+ 替换基体中不同价态的元素时，Y/B 确实取决于 Dy3+ 的浓度，因为形成了缺陷 在这种情况下。
Various borates, vanadates, niobates, antimonates, titanates, zirconates and CaS doped with Dy3+were prepared. Factors which have an effect on the yellow-to-blue intensity ratio (Y/B) of Dy3+emission are reported.Y/Bincreases with decreasingZ/ror electronegativity of the next-neighbour element M in the complex oxides Dy-O-M. The greater the degree of covalency between Dy3+and O2−, the greaterY/Bis. When Dy3+is located at a site with an inverse centre and high symmetry, Dy3+displays no luminescence. It seems thatY/Bof Dy3+located at a site deviated from an inverse centre is greater than that of Dy3+located at a site without an inverse centre.Y/Bdoes not vary much with the variation in concentration of Dy3+when Dy3+is substituted for an element with the same valency, but it does depend on the concentration of Dy3+when Dy3+is substituted for an element with a different valency in the matrix, because defects are formed in this case.