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Developing efficient temperature-sensing window under down-conversion energy transfer scheme
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DOI：10.1016/j.ceramint.2025.10.096.png)
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Abstract
En 中文
Lanthanide-ion luminescence is highly sensitive to temperature due to the unique sharp 4f–4f transitions (with 4f–5d transitions relevant only in selected ions such as Ce3+ and Eu2+). Traditional lanthanide-doped thermal sensing materials typically rely on an up-conversion scheme, where excitation by high-energy photons results in thermally coupled energy states. These systems follow the Boltzmann distribution, which constrains their sensitivity and often requires high-power and expensive excitation sources, limiting their further application such as temperature sensing window. In this study, we propose a novel temperature-sensing mechanism based on a down-conversion energy transfer scheme, which offers significant advantages over the up-conversion approach. Using a Tm3+ and Yb3+ co-doped Y2Zr2O7 transparent ceramic system, we applied a temperature-dependent rate equation model in these transparent ceramic window materials, demonstrating the feasibility of this approach for efficient temperature sensing. By adjusting the Yb3+ concentration, we achieved a sensitivity of up to 0.3 % K−1, utilizing low-cost excitation sources. This work combines theoretical analysis with experimental validation to showcase the potential of down-conversion luminescence for high-efficiency, cost-effective temperature sensing applications.