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Achieving high thermal stability of different rare-earth ions in a single matrix host via the manipulation of the local structure by a solid solution

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Abstract

Thermal quenching seriously restricts the practical application of phosphors, particularly under high temperature and long-term working conditions. Here, we demonstrate that the as-obtained series of solid solutions of Ca2−xYxAl2Si1−xAlxO7:Tb3+ (x = 0–1, Ca2Al2SiO7 → CaYAl3O7) phosphors exhibit an adjustable optical performance, where CaYAl3O7:Tb3+ exhibits a greatly improved thermal stability with a shortened bond distance of the related polyhedron compared with Ca2Al2SiO7:Tb3+. The shrunken bond distance strengthens the pressure of the local structure and suppresses the non-radiative transition effectively, contributing to the prevention of the thermal degradation. The formed phosphor with excellent structural stability could be effectively incorporated with various lanthanide ions (Eu3+, Tb3+, Sm3+, Dy3+, and Pr3+) to address a pleochroism output.

Graphical abstract: Achieving high thermal stability of different rare-earth ions in a single matrix host via the manipulation of the local structure by a solid solution

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Article information


Submitted
04 Feb 2020
Accepted
25 Jun 2020
First published
25 Jun 2020

Phys. Chem. Chem. Phys., 2020, Advance Article
Article type
Paper

Achieving high thermal stability of different rare-earth ions in a single matrix host via the manipulation of the local structure by a solid solution

X. Yang, L. Zhao, Z. Liu, S. Tian, H. Zhang, X. Xu, J. Qiu and X. Yu, Phys. Chem. Chem. Phys., 2020, Advance Article , DOI: 10.1039/D0CP00612B

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