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首页> 外文期刊>Solid State Communications >Correlation of photoluminescence of (Y, Ln)VO4 : Eu3+ (Ln = Gd and La) phosphors with their crystal structures
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Correlation of photoluminescence of (Y, Ln)VO4 : Eu3+ (Ln = Gd and La) phosphors with their crystal structures

机译：（Y，Ln）VO4：Eu3 +（Ln = Gd和La）荧光粉的光致发光与其晶体结构的相关性

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摘要

We have studied the photoluminescence (PL) of (Y, Ln)VO4:Eu3+ (Ln = La and Gd) phosphors and the correlation of the PL of those phosphor with their crystal structure. It is found that (Y, Gd)VO4:Eu3+ phosphors have the same crystal structure as YVO4:Eu, which is tetragonal with a little different lattice parameters. In the case of (Y, La)VO4:Eu phosphors, however, the gradual change from tetragonal to monoclinic structure of host lattice was observed as the amount of La ion increased. To investigate the PL property of (Y, Ln)VO4:Eu3+ (Ln = La and Gd) phosphors, vacuum ultraviolet (VUV) and ultraviolet (UV) excitation were used. The favorable crystal structure for the PL intensity of orthovanadate phosphor under 147 and 254 nm excitation was tetragonal containing Gd ion and under 365 nm excitation was monclinic containing La ion which might have the lowest site symmetry for Eu3+ ion. (c) 2005 Elsevier Ltd. All rights reserved.
机译：我们研究了（Y，Ln）VO4：Eu3 +（Ln = La和Gd）荧光粉的光致发光（PL）以及这些荧光粉的PL与它们的晶体结构的相关性。发现（Y，Gd）VO4：Eu3 +磷光体具有与YVO4：Eu相同的晶体结构，YVO4：Eu3是四方晶，其晶格参数略有不同。但是，在（Y，La）VO4：Eu荧光粉的情况下，随着La离子量的增加，观察到主晶格从四方结构向单斜结构逐渐变化。为了研究（Y，Ln）VO4：Eu3 +（Ln = La和Gd）荧光粉的PL特性，使用了真空紫外（VUV）和紫外（UV）激发。在147和254 nm激发下，原钒酸盐磷光体的PL强度的有利晶体结构是含Gd离子的四方晶，而在365 nm激发下，含La离子的单斜晶可能对Eu3 +离子具有最低的位对称性。 （c）2005 Elsevier Ltd.保留所有权利。

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