High-quantum-efficiency Eu3+-doped TeO2-B2O3-PbO glasses for non-contact optical temperature sensing excited by 405 nm laser.
VICENTE, Fabio Simões de; CHAIM, Thiago Ardana; HERNANDES, Antônio Carlos.
VICENTE, Fabio Simões de; CHAIM, Thiago Ardana; HERNANDES, Antônio Carlos.
Abstract: We report the synthesis and comprehensive optical characterization of a high TeO2 concentration lead boro-tellurite (TBP) glass with composition 70TeO2-20B2O3-10PbO doped with different concentrations (0.5-2.0 mol %) of Eu3+ ions. The Eu3+-doped TBP glasses exhibit high optical transparency, enhanced structural stability, and intense red photoluminescence under low-power 405 nm laser excitation (10 mW), with emission quantum efficiencies up to 80.3 %. Judd-Ofelt analysis and decay time measurements confirm the efficient radiative properties of the Eu3+ ions in this glass matrix. A high-performance non-contact optical thermometry system was developed using the temperature-dependent luminescence intensity ratio (LIR) between the 5D0?7F2 (613 nm) and 5D0?7F1 (592 nm) transitions and a valley at 602 nm, allowing for accurate temperature readout from 18 to 298 °C (291 to 571 K). The Eu3+-doped TBP glasses exhibited excellent reversibility, thermal stability, and sensitivity, with best thermometric response for the sample TBP:2.0Eu3+ with maximum relative sensitivity of 0.89 % K-1 and temperature resolution as low as 0.26 K at 571 K. These results position Eu3+-doped TBP glasses as promising candidates for robust, low-cost, and high-resolution optical thermometric applications in harsh environments.
@article={003295767,author = {VICENTE, Fabio Simões de; CHAIM, Thiago Ardana; HERNANDES, Antônio Carlos.},title={High-quantum-efficiency Eu3+-doped TeO2-B2O3-PbO glasses for non-contact optical temperature sensing excited by 405 nm laser},journal={Optical Materials},note={v. 174, p. 118005-1118005-10 + supplementary material},year={2026}}