Details

Autor(en) / Beteiligte

• Zheng, Jinjie
• Shen, Honglie
• Li, Yufang
• Li, Hechao
• Yue, Zhen

Titel

Structural and luminescent performance and optical thermometry of Pr3+ doped SrWO4 down-conversion phosphors

Ist Teil von

• Journal of alloys and compounds, 2023-12, Vol.968, p.172112, Article 172112

Ort / Verlag

Elsevier B.V

Erscheinungsjahr

2023

Link zum Volltext

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A series of Pr3+ doped SrWO4 phosphors were synthesized using solid-state reaction routes. The phase composition, photoluminescence and temperature sensitivities of as-prepared materials were investigated. Rietveld refinement of measured XRD data was applied to analyze the lattice parameters. The optical transition was elaborated using UV–visible diffuse reflectance spectra and photoluminescence spectra. The photoluminescence measurements confirmed the strong visible light emission from the developed phosphors under both UV excitation at 250 nm and blue excitation at 450 nm. Notably, the maximum emission intensity was observed at a Pr3+ doping concentration of 2 mol%. Furthermore, the fluorescence intensity ratio (FIR) technique was employed, focusing on the emissions originating from the 3P0 and 1D2 state of Pr3+ within the temperature range of 298–598 K. Two FIR groups were adopted in this case, which can verify each other to achieve self-calibration. Typically, SrWO4:0.02Pr3+ exhibited remarkable performance as a temperature sensor, displaying an absolute sensitivity (Sa) of 3.11%K−1 and a relative sensitivity (Sr) of 0.81%K−1. As a result, the significant temperature-dependent PL and remarkable down-conversion luminescence make the SrWO4:Pr3+ material a promising candidate for optical thermometers and UV to visible converters of solar cell applications. •Intense visible emission of SrWO4:Pr3+ excited by 250 nm and 450 nm was observed.•FIR from non-thermally coupled energy levels was used for temperature sensing.•The wide-range and highly-sensitive of optical temperature sensing were realized.•The self-calibration of temperature measurement was achieved by two FIR groups.