Abstract
The family of rare-earth doped phosphors has drawn pronounced attention in technological of fingerprint visualization, anti-counterfeiting, and phosphor-converted light-emitting diodes applications. A series of NaSrGd(1–x–y)EuxDyy(WO4)3 powder luminescent materials were synthesized by a solid-state reaction. The emission color of NaSrGd(WO4)3:Dy3+ phosphor could be tunned via changing concentrations of Eu3+ ion. In addition, the phosphors exhibit narrow red-light emission at 610 nm caused by the electric dipole transition 5D0 → 7F2 of Eu3+. Especially, the phosphor exhibits superior thermal stability, its emission intensity of optimum sample remained ± 15% over the temperature range from 233 to 393 K. The Commission International de I’Eclairage (CIE) chromaticity coordinates of x = 0.4 are (0.6388, 0.3371) with a high color purity (92.84%). More importantly, prepared color-changing device of phosphors achieves a high level of optical safety. The results demonstrate that their materials can be potentially applied to the field of white light-emitting diodes (LEDs) and optical anti-counterfeiting.
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Acknowledgements
This work was supported by the National Natural Science Foundation of China (Grant No. 51572195).
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Hong Liu: methodology, supervision, writing-original draft preparation; Huihua Ye: methodology; RH: supervision; WL: methodology; JL: validation; ST: investigation, visualization; XW: writing-review and editing, funding, supervision; YL: supervision; XY: supervision.
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Liu, H., Li, W., Ye, H. et al. Red/deep-red emitting phosphors of Eu3+/Dy3+ co-doped NaSrGd(WO4)3 for LED and optical anti-counterfeiting. Appl. Phys. A 130, 25 (2024). https://doi.org/10.1007/s00339-023-07172-1
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DOI: https://doi.org/10.1007/s00339-023-07172-1