首页|Lu3+对Er2Mo4O15∶Tm3+功率响应上转换发光色度的影响

Lu3+对Er2Mo4O15∶Tm3+功率响应上转换发光色度的影响

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在前期报道的Er2Mo4O15∶4%Tm3+体系中,通过引入惰性的Lu3+对Er3+进行格位替换,使得功率响应的色度调控能力实现31.5%的提升.机理研究表明,当Lu3+掺杂时,晶胞收缩使得Er3+-Tm3+耦合加强,处于4I11/2能级的电子被更多地以Er3+→Tm3+→Er3+的方式选择性布居红光发射能级,从而使得低功率时的IR/IG增大.由于增强的Er3+-Tm3+耦合使得功率项系数增大,所以IR/IG表现出更好的功率响应特性.该研究报道了一种精细调控Er3+-Tm3+耦合的策略,可为功率响应变色上转换发光的设计提供参考.
Influence of Lu3+on Power-responsive Upconversion Luminescence Chromaticity of Er2Mo4O15∶Tm3+
In the Er2Mo4O15∶Tm3+system reported in the previous paper,by introducing inert Gd3+and Lu3+to replace Er3+,the power-responsive color change has been improved by 31.5%.The study of the physical mechanism shows that when Lu3+is doped,the contraction of the lattice strengthens the Er3-Tm3+coupling,and the electrons at the 4I 11/2 energy level are more populated into the light-emitting level for red UCL in the form of Er3+→Tm3+→ Er3+,thus making the IR/IG larger at low power.On the other hand,thanks to the improved Er3+-Tm3+coupling,the coefficient of the power term is larger,followed by a better power response behavior.This study reports a new strategy for fine-tuning Er3+-Tm3+coupling and provides a reference for the regulation of power-responsive color regulation of UCL.

upconversion luminescencedynamic anti-counterfeitingpower response

赵佳瑞、庞涛

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湖州师范学院 理学院,浙江湖州 313000

上转换发光 动态防伪 功率响应

国家自然科学基金项目湖州市自然科学基金项目国家级大学生创新创业训练计划项目

121472192022YZ06202210347025

2024

湖州师范学院学报
湖州师范学院

湖州师范学院学报

影响因子:0.301
ISSN:1009-1734
年,卷(期):2024.46(2)
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