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A colorimetric optical thermometry of host-sensitized Pr3+-doped niobate phosphors based on electronic-rich-site strategy.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 5/28/2021, Vol. 50 Issue 20, p7026-7040, 15p
- Publication Year :
- 2021
-
Abstract
- Most praseodymium-doped red-emitting phosphors need high-temperature synthesis conditions with a reducing atmosphere. The niobate matrix selected in this work provides a sufficient electron-rich-site environment for praseodymium through charge migration, and praseodymium can be self-reduced in air atmosphere, which is safe and environmentally friendly. By building the [NbO<subscript>6</subscript>] group → Pr<superscript>3+</superscript> energy transfer and finely modifying the doping concentration of Pr<superscript>3+</superscript> ions, we constructed a dual-luminescence-system of the [NbO<subscript>6</subscript>] group and Pr<superscript>3+</superscript>. Thereby, optical temperature measurement based on fluorescence intensity ratio (FIR) technology of Pr<superscript>3+</superscript> ions and [NbO<subscript>6</subscript>] groups was carried out using non-thermal coupling pairs, through the Boltzmann fitting and integral calculation, the maximum S<subscript>r</subscript> and S<subscript>a</subscript> values were 2.25% K<superscript>−1</superscript> and 0.0049 K<superscript>−1</superscript> at 403 K and 443 K, respectively, the S<subscript>r</subscript> value is four times that obtained from the thermal coupling of Pr<superscript>3+</superscript> ions, which exceeded most values previously reported for the fluorescence powder. Accordingly, we also studied the thermal sensitivity of Er<superscript>3+</superscript> ions and Eu<superscript>3+</superscript> ions mono-doped CaNb<subscript>2</subscript>O<subscript>6</subscript> substrates. Results reveal that CaNb<subscript>2</subscript>O<subscript>6</subscript>:Pr<superscript>3+</superscript>/Er<superscript>3+</superscript>/Eu<superscript>3+</superscript> phosphors have splendid temperature sensitivity and have far-reaching application prospects in the field of temperature measurements. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 50
- Issue :
- 20
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 150465043
- Full Text :
- https://doi.org/10.1039/d1dt00933h