Tailoring the Luminescence Properties of Cs2TeCl6 Nanocrystals via High-Pressure and Low-Temperature Stimuli for Multiparameter Optical Manometry and Thermometry

W4414554026 · 수집 2026-10-04 18:16:39

T11878 Solid-state spectroscopy and crystallography

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To search for a bifunctional luminescent platform for optical manometry and thermometry, Cs2TeCl6 nanocrystals were prepared. Excited at 456 nm, the designed nanocrystals emitted dazzling orange emission, whose fluorescence intensity, full width at half-maximum (fwhm), and decay time were sensitive to temperature. Through analyzing the temperature-dependent lifetime, the thermometric properties of the resulting nanocrystals were evaluated, resulting in a high relative sensitivity of 3.76% K-1. The pressure-related Raman spectra demonstrated the splendid structural stability and reversibility of the studied samples. By studying the pressure-dependent Raman modes, one knows that the maximum pressure sensitivity of the Cs2TeCl6 nanocrystals was 9.62 cm-1 GPa-1. Furthermore, as the pressure increases, a distinct spectral blue-shift was observed in the synthesized nanocrystals, contributing to the controllable luminescence at high-pressure. Through analyzing the pressure-dependent emission band centroid and fwhm, one knows that the maximum pressure sensitivities of the resultant nanocrystals were 3.54 and 4.82 nm GPa-1, respectively. Additionally, based on the pressure-dependent color coordinate, it was found that the maximum relative sensitivity of the designed nanocrystals was 4.62% GPa-1. Our findings imply that the utilization of high-pressure and low-temperature stimuli is an efficient route to regulate the luminescence properties of the Cs2TeCl6 nanocrystals.

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Tailoring the Luminescence Properties of Cs<sub><b>2</b></sub>TeCl<sub><b>6</b></sub> Nanocrystals <i>via</i> High-Pressure and Low-Temperature Stimuli for Multiparameter Optical Manometry and Thermometry

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