Photoluminescence Properties and Mn → Tm Energy Transfer of Lalitio: Mn, Tm for Thermometry and Nir-Led Applications
SSRN, ISSN: 1556-5068
2024
- 57Usage
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Article Description
Over the span of years, Mn4+-doped red phosphors have been utilized to meaningful optoelectronic devices due to their outstanding optical properties, and Tm3+ usually is an activator ion because of its efficient up-conversion emission, but inverse processes are rarely used. Herein, we have successful synthesized a series of novel La0.557Li0.33Ti1-xO3:xMn4+ (x = 0.1%-7%) phosphors. The photoluminescence properties have been detailed analysis. Using Mn4+-Tm3+ co-doped strategy, we successfully synthesis La0.557-yLi0.33Ti0.993O3:0.7%Mn4+, yTm3+ phosphors. upon excitation with 360 nm light, it exhibits two distinct emission peaks at 729 nm and 806 nm. The emission intensity of Tm3+ was greatly improved after Mn4+ doping, which is due to the energy transfer of Mn4+ to Tm3+. In terms of potential applications, utilizing fluorescence intensity ratio technology, La0.551Li0.33Ti0.993O3:0.7%Mn4+,0.6%Tm3+ exhibits maximum absolute and relative sensitivities of 3.25% K-1 and 3.49% K-1, thereby demonstrating its potential for application in optical thermometry. Furthermore, The NIR-LED using phosphor and 365 nm chips reveal potential applications of the La0.551Li0.33Ti0.993O3:Mn4+,Tm3+ phosphor in NIR night vision and biosensing.
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