Development of SrWO:Ho/Yb green phosphor for optical thermometry application

• Published in: Physical chemistry chemical physics : PCCP Vol. 25; no. 46; pp. 32184 - 32195
• Main Authors: Gopal, Ram, Kumari, Chandni, Manam, Jairam
• Format: Journal Article
• Published: 29.11.2023
• ISSN: 1463-9076; 1463-9084
• DOI: 10.1039/d3cp04574a

In recent years, the growth of luminescent materials for optical thermometry applications has gained substantial attention due to their non-invasive and contactless nature. This research article presents the synthesis, characterization, and potential application of SrWO 4 :Ho 3+ /Yb 3+ phosphors as temperature-sensitive materials. The inspection of the structural properties is done by X-ray diffraction and Raman and FTIR spectroscopy. The X-ray diffraction signifies the single tetragonal phase of the materials without any impurity or secondary phase. Nine Raman active modes are detected in the Raman spectra of pure SrWO 4 and 10 Raman active bands are present in the doped samples. The morphology and elemental composition are visualised by field emission scanning electron microscopy (FESEM) and energy dispersive X-ray (EDX) spectroscopy. The spectral properties of these phosphors are evaluated by down-conversion and up-conversion photoluminescence, signifying their suitability for solid state lighting and optical thermometry in various temperature regimes. The phosphors can generate green and yellow light under blue and near-infrared radiation, respectively. The sensitivity of 3.19 × 10 −3 K −1 ensures the promising prospects of SrWO 4 :Ho 3+ /Yb 3+ phosphors for precise and reliable temperature sensing in diverse fields. SrWO 4 : Ho 3+ /Yb 3+ phosphor exhibiting down-conversion and up-conversion photoluminescence for green light generation and optical thermometry applications.