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Designing Color-tunable luminescent thermometers and information encryption based on Pr3+ or Sm3+ doped SrNb2O6: Tb3+ phosphors via energy transfer
[Display omitted] •MMCT → IVCT and MMCT → 4f ET processes based Tb3+-Pr3+/Sm3+ doped SNO are discussed.•The effect of different ET process on temperature sensing performance has been investigated.•Tb3+or Pr3+ doped SNO exhibit good potential application of information hiding and encryption. Color-tu...
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Published in: | Optics and laser technology 2022-12, Vol.156, p.108603, Article 108603 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | [Display omitted]
•MMCT → IVCT and MMCT → 4f ET processes based Tb3+-Pr3+/Sm3+ doped SNO are discussed.•The effect of different ET process on temperature sensing performance has been investigated.•Tb3+or Pr3+ doped SNO exhibit good potential application of information hiding and encryption.
Color-tunable luminescence intensity ratio thermometers and information encryption are firstly designed through different energy transfer mechanism. Herein, two types thermometric materials, SrNb2O6: Tb3+, Pr3+ and SrNb2O6: Tb3+, Sm3+ are prepared. The Tb3+ and Pr3+ typical emissions show luminescence mechanism between two intervalence charge transfer states. Whereas, Tb3+ and Sm3+ emissions are related to energy migration from intervalence charge transfer state to 4f level. Interestingly, (5D4→7F5)Tb3+/(1D2→3H4)Pr3+ or (5D4→7F5)Tb3+/(4G5/2→6H7/2)Sm3+ have different temperature sensing properties due to distinct energy transfer processes and provide visualization of temperature measurement. The former gains high sensitivity (Sa = 0.012 K−1) at high temperature region, and the latter reach as high as Sa = 0.028 K−1 at low temperature. Besides, using multi-mode color emission of Tb3+ or Pr3+ doped SrNb2O6 achieves information hiding. This work not only shows new strategy to develop high-efficiency luminescent thermometers but also develop flexible optical encryption technology. |
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ISSN: | 0030-3992 1879-2545 |
DOI: | 10.1016/j.optlastec.2022.108603 |