Issue 18, 2024

Excellent red upconversion luminescence in GdLaO3:Er3+/Yb3+/Sc3+ under 980 nm laser excitation

Abstract

A series of (Gd0.8−xEr0.1Yb0.1Scx)LaO3 and (Gd0.8Er0.1Yb0.1)(La1−xScx)O3 upconversion luminescence (UCL) phosphors were prepared by solid state sintering technology. The structure, diffuse reflection, and UCL spectra were investigated. (Gd0.8Er0.1Yb0.1)(La0.9Sc0.1)O3 represents excellent red UCL, which is comparable to commercial red β-NaYF4:Er3+/Yb3+. Er3+/Yb3+ are distributed in a continuous double layer structure, blocked by a single layer of Sc3+/La3+. This structure allows cross relaxation (CR) to occur only in the double-layer structure and improves the efficiency of energy transfer with CR in the double-layer, resulting in the emission of outstanding red UCL. Using the luminescence branching intensity ratio (LIR) technique, the maximum value of relative temperature sensitivity is calculated as 0.01295 K−1 at 303 K. GdLaO3:Er3+/Yb3+/Sc3+ has excellent pure red UCL and can be applied in luminescence display and temperature sensing.

Graphical abstract: Excellent red upconversion luminescence in GdLaO3:Er3+/Yb3+/Sc3+ under 980 nm laser excitation

Supplementary files

Article information

Article type
Paper
Submitted
14 mar 2024
Accepted
11 abr 2024
First published
12 abr 2024

J. Mater. Chem. C, 2024,12, 6559-6567

Excellent red upconversion luminescence in GdLaO3:Er3+/Yb3+/Sc3+ under 980 nm laser excitation

M. Li, Y. Cao, L. Cheng, T. Liu, Y. Fan, J. Zhang and B. Chen, J. Mater. Chem. C, 2024, 12, 6559 DOI: 10.1039/D4TC01015A

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