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Cation Engineering-Regulated Sr(AlGa)Si2O8:Er3+/Yb3+ Phosphor Enables High-Performance Optical Temperature Sensing and Information Anticounterfeiting Encryption
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DOI：10.1016/j.ceramint.2026.08.067.png)
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Abstract
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• A novel Sr(AlGa)Si2O8:0.01Er3+, 0.09Yb3+ upconversion phosphor was successfully prepared via cation engineering, where Ga3+ substitution for Al3+ induces lattice distortion that reduces matrix symmetry, resulting in a 10.80-fold enhancement in luminescence intensity under 980 nm excitation. • The phosphor demonstrates superior dual-mode temperature sensing performance, achieving maximum relative sensitivities of 1.503%K-1 (at 980 nm) and 9.739%K-1 (at 808 nm) in 293-493 K, outperforming most reported feldspar-based and Er3+-doped luminescent materials. • Benefiting from its unique dual-mode luminescence behavior, the phosphor enables high-security programmable encryption and multimode anticounterfeiting, providing a practical approach for developing multifunctional optical materials suitable for both harsh-environment monitoring and information security applications.
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