학술논문
KCl flux-assisted CaTiO3: Pr3+ red phosphors for temperature sensing
Document Type
Article
Author
Source
(2024): 242-250.
Subject
Language
Korean
ISSN
12299162
Abstract
The red CaTiO3: Pr3+ phosphors were fabricated by employing a solid-state method using KCl flux, and investigated fortemperature sensing. There were no structural changes observed with increasing KCl concentration, and no impuritieswere detected. The obtained crystal structure was identified as an orthorhombic perovskite, belonging to space group ofPnma(62). The typical sample exhibited spherical particles (1-2 μm). The optical bandgap of the sample was measured to beapproximately 3.62 eV. Notably, when the KCl concentration reached 3%, the sample exhibited the highest photoluminescenceintensity, indicating excellent crystallization strength. They closely resembled the chromaticity coordinates of ideal red lightbased on CIE chromaticity diagram, and the color purity was determined to be 79.51%. Furthermore, the absolute sensitivity(Sa) was approximately as high as 0.148 K-1, while the relative sensitivity (Sr) reached approximately a high value of 6.57% K-1,which highlights the significant potential of optical thermometry.
The red CaTiO3: Pr3+ phosphors were fabricated by employing a solid-state method using KCl flux, and investigated fortemperature sensing. There were no structural changes observed with increasing KCl concentration, and no impuritieswere detected. The obtained crystal structure was identified as an orthorhombic perovskite, belonging to space group ofPnma(62). The typical sample exhibited spherical particles (1-2 μm). The optical bandgap of the sample was measured to beapproximately 3.62 eV. Notably, when the KCl concentration reached 3%, the sample exhibited the highest photoluminescenceintensity, indicating excellent crystallization strength. They closely resembled the chromaticity coordinates of ideal red lightbased on CIE chromaticity diagram, and the color purity was determined to be 79.51%. Furthermore, the absolute sensitivity(Sa) was approximately as high as 0.148 K-1, while the relative sensitivity (Sr) reached approximately a high value of 6.57% K-1,which highlights the significant potential of optical thermometry.
The red CaTiO3: Pr3+ phosphors were fabricated by employing a solid-state method using KCl flux, and investigated fortemperature sensing. There were no structural changes observed with increasing KCl concentration, and no impuritieswere detected. The obtained crystal structure was identified as an orthorhombic perovskite, belonging to space group ofPnma(62). The typical sample exhibited spherical particles (1-2 μm). The optical bandgap of the sample was measured to beapproximately 3.62 eV. Notably, when the KCl concentration reached 3%, the sample exhibited the highest photoluminescenceintensity, indicating excellent crystallization strength. They closely resembled the chromaticity coordinates of ideal red lightbased on CIE chromaticity diagram, and the color purity was determined to be 79.51%. Furthermore, the absolute sensitivity(Sa) was approximately as high as 0.148 K-1, while the relative sensitivity (Sr) reached approximately a high value of 6.57% K-1,which highlights the significant potential of optical thermometry.