Abstract

In this work, luminescence processes in polycrystalline NaLaF₄:Tm³⁺ and NaLaF₄:Tm³⁺,Yb³⁺ materials were studied. Luminescence spectra and decay kinetics measurements were performed for NaLaF₄ doped with various Tm³⁺ concentrations (0.01, 0.1, 0.5, 1, and 2 mol%) under direct excitation to ³P₀, ¹D₂, ¹G₄, and ³H₄ states. It was found that some of the Tm³⁺ excited states are more affected by Tm³⁺ concentration than other states. Under infrared excitation of Yb³⁺, energy transfer to Tm³⁺ occurred and intensive ultraviolet and blue up-conversion luminescence was observed. Possible up-conversion mechanisms are discussed. Spectroscopic measurements show that long-duration excitation radiation reduces ultraviolet up-conversion luminescence intensity, and this intensity reduction is related to sample heating due to high excitation radiation density and a poor heat sink from samples. It was found that sample configuration for spectroscopic measurements is crucial to correctly describe measured up-conversion luminescence spectra.

© 2021 The Author(s)

Up-conversion luminescence of Er³⁺-Yb³⁺ co-doped CaIn₂O₄

Ting Li, Chongfeng Guo, and Lin Li
Opt. Express 21(15) 18281-18289 (2013)

Crystal structural effects on up/down-conversion luminescence properties of GdInO₃:Tm,Yb perovskite phosphors for effective dual-mode anti-counterfeit applications

Xiao-min Wang, Kai Feng, Liang Shan, Jie Zou, and Bin Lu
Opt. Express 32(8) 14018-14032 (2024)

Experimental optimization design synthesis for up-conversion luminescence performance in SrBi₄Ti₄O₁₅: Er³⁺/Yb³⁺ red-green phosphors

Shengyi Liu, Duan Gao, Li Wang, Wenbin Song, Zhiliang Zhang, Shitao Wang, Ying Zhu, and Qi Zhang
J. Opt. Soc. Am. B 41(3) 798-808 (2024)

Up-conversion luminescence of novel Yb³⁺-Ho³⁺/Er³⁺ doped Sr₅(PO₄)₃Cl phosphors for optical temperature sensing

Jia Zhang, Guibin Chen, and Zhenghe Hua
Opt. Mater. Express 7(6) 2084-2089 (2017)

Visible and near infra-red up-conversion in Tm³⁺/Yb³⁺ co-doped silica fibers under 980 nm excitation

D. A. Simpson, W. E. K Gibbs, S. F. Collins, W. Blanc, B. Dussardier, G. Monnom, P. Peterka, and G. W. Baxter
Opt. Express 16(18) 13781-13799 (2008)