Issue 33, 2021

Enhanced up-conversion emission in Er3+-doped barium–natrium–yttrium–fluoride phosphors by alkali ion introduction under 1550 nm excitation

Abstract

In this work, multi-component fluoride phosphors BaxNaynMnYzF2x+y+3z+3m : Er3+m (M = Li and K) sensitive to 1550 nm were synthesized by the low-temperature combustion synthesis (LCS) method. The optimum batch formula was determined by orthogonal experiments. The effects of introducing alkali ions (Li+, K+) on phase formation and luminescence intensity were systematically studied. The results indicate that the luminescence intensity of 0.2 mol% Li+-introduced nanoparticles is obviously enhanced, and the diffraction peak is shifted to the direction of a smaller diffraction angle, which is attributed to the lattice expansion caused by Li+ ions entering the lattice gap that changes the local symmetry of Er3+ ions. The phase composition and morphology of phosphors were analyzed by X-ray diffraction and scanning electron microscopy (SEM). The product exhibited Er3+ ion characteristic emission under 1550 nm excitation, and its luminescence mechanism was studied. This work provides a new idea for improving the luminescence intensity of up-conversion luminescent materials (UCL) under 1.5 μm excitation.

Graphical abstract: Enhanced up-conversion emission in Er3+-doped barium–natrium–yttrium–fluoride phosphors by alkali ion introduction under 1550 nm excitation

Supplementary files

Article information

Article type
Paper
Submitted
26 May 2021
Accepted
18 Jul 2021
First published
19 Jul 2021

CrystEngComm, 2021,23, 5601-5608

Enhanced up-conversion emission in Er3+-doped barium–natrium–yttrium–fluoride phosphors by alkali ion introduction under 1550 nm excitation

F. Hu, Q. Wan, L. Lu, H. Sun, X. Zhang, Z. Bai and X. Mi, CrystEngComm, 2021, 23, 5601 DOI: 10.1039/D1CE00695A

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