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KLn(MoO4)2 micro/nanocrystals (Ln = La–Lu, Y): systematic hydrothermal crystallization, structure, and the performance of doped Eu3+ for optical thermometry.
- Source :
- Dalton Transactions: An International Journal of Inorganic Chemistry; 12/21/2021, Vol. 50 Issue 47, p17703-17715, 13p
- Publication Year :
- 2021
-
Abstract
- Systematic crystallization of KLn(MoO<subscript>4</subscript>)<subscript>2</subscript> double molybdate micro/nanocrystals was achieved in this work for the family of lanthanide elements (excluding Pm) and Y via hydrothermal reaction under the optimized conditions of pH = 7, Mo/Ln molar ratio R = 5 and 200 °C, with which the intrinsic influence of lanthanide contraction on phase preference, crystallite morphology (size/shape) and crystal structure was clearly revealed. Extended synthesis also produced KLa<subscript>1−x</subscript>Eu<subscript>x</subscript>(MoO<subscript>4</subscript>)<subscript>2</subscript> (KLM:xEu) and KY<subscript>1−y</subscript>Eu<subscript>y</subscript>(MoO<subscript>4</subscript>)<subscript>2</subscript> (KYM:yEu) red phosphors, and detailed spectral analysis found that the layered structure of orthorhombic KYM allows Eu<superscript>3+</superscript> to have a high quenching content of ∼70 at% (y = 0.7) and higher quantum efficiency and thermal stability of luminescence. Application also indicated that the KYM:0.7Eu optimal phosphor has the potential for optical temperature sensing with the thermally coupled <superscript>5</superscript>D<subscript>0</subscript> and <superscript>5</superscript>D<subscript>1</subscript> energy levels of Eu<superscript>3+</superscript>. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 14779226
- Volume :
- 50
- Issue :
- 47
- Database :
- Complementary Index
- Journal :
- Dalton Transactions: An International Journal of Inorganic Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 173556407
- Full Text :
- https://doi.org/10.1039/d1dt03642d