Comparative Analysis of Spectral Broadening Techniques for Optical Temperature Sensing in Yttrium Fluoride (YF3) Doped with Neodymium
Year: 2025
Type: article
Abstract: In this work, YF3:Nd3+ powder was synthesized using the microwave-assisted hydrothermal method at a low temperature (140 °C) and short synthesis time (1 h). The photoluminescence and optical temperature sensing properties of YF3:Nd3+ were examined using 800 nm laser excitation, focusing on the emission corresponding to the 4F3/2 → 4I9/2 transition of Nd3+. The performance of YF3:Nd3+ as an optical temperature sensor was evaluated using the full width at half maximum (FWHM), band broadening at 30% of maximum intensity (Δλ30%), and valley-to-peak intensity ratio (VPR) techniques. All techniques demonstrated good repeatability and reproducibility. The best results were obtained using the VPR (V1/P1) method, which exhibited the highest relative sensitivity and the lowest temperature uncertainty, with values of 0.69 ± 0.02% K−1 and 0.46 ± 0.09 K at 303 K, respectively. YF3:Nd3+ shows promise as an optical temperature sensor operating entirely within the first biological window.
Source: Sensors
DOI: 10.3390/s25072324
Institution: Universidade Federal de Sergipe
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: gold
Estimated APC paid: $3,137
Funders: Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Ministério da Ciência, Tecnologia e Inovação, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Fundação de Apoio à Pesquisa e à Inovação Tecnológica do Estado de Sergipe, Fundação de Amparo à Ciência e Tecnologia do Estado de Pernambuco, Instituto Nacional de Fotônica
OpenAlex ID: W4409235554