Wide-responsive-range multicolor temperature-dependent photoluminescence of LiYW2O8/LiYW2O8:Eu3+ phosphors for anti-counterfeiting

被引：2
作者：
Wang, Shanwen [1 ]
Wang, Wenxiang [1 ]
Zhang, Jiachi [1 ]
机构：
[1] Lanzhou Univ, Natl & Local Joint Engn Lab Opt Convers Mat & Tech, Lanzhou 730000, Peoples R China
来源：
JOURNAL OF LUMINESCENCE | 2024年 / 275卷
基金：
中国国家自然科学基金;
关键词：
Temperature-dependent photoluminescence; Phosphor; Anti-counterfeiting; LiYW2O8:Eu3+; THERMAL-STABILITY; LUMINESCENCE; EARTH; EMISSION; BEHAVIOR; STATES; EU3+; BAND; RE;
D O I：
10.1016/j.jlumin.2024.120811
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Temperature-dependent photoluminescence (PL) strongly depends on temperature and can be applied for non-contact PL anti-counterfeiting. However, it still needs a temperature-dependent PL phosphor with significant PL color changes over a wide range around room temperature. In this work, the LiYW2O8/LiYW2O8:Eu3+ phosphors are presented. The PL of the phosphors consists of a broadband host emission and narrow Eu3+ emissions, which show significantly different temperature dependences over a large range (room temperature +/- 160 degrees C). It indicates that as the temperature increases from -140 degrees C to 180 degrees C, the PL color of the LiYW2O8 changes from green to blue and that of the LiYW2O8:Eu3+ changes from green-blue to red. Based on the unique multicolor temperature-dependent PL, a PL anti-counterfeiting logo is designed based on the LiYW2O8/LiYW2O8:Eu3+ phosphors and polydimethylsiloxane (PDMS) polymer. The results show that the PL color of the logo significantly changes with temperature, and therefore the LiYW2O8/LiYW2O8:Eu3+ phosphors are promising for designing PL anti-counterfeiting.
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页数：6
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