Issue 42, 2021

Cr3+-activated Na3X2Li3F12 (X = Al, Ga, or In) garnet phosphors with broadband NIR emission and high luminescence efficiency for potential biomedical application

Abstract

With the rapid development of NIR pc-LEDs, the development of a novel NIR phosphor with broadband emission, strong luminescence and high thermal stability is urgent. Here, three isotypic garnet fluorides Na3X2Li3F12 (X = Al, Ga, or In) (NXLF) activated by Cr3+ were synthesized. The emission peak shifts from 752 to 778 nm and FWHM expands from 101 to 121 nm. The values of Dq/B indicate that Cr3+ ions undergo a weak crystal field. Among them, NInLF:Cr3+ has the highest IQE of 87.2% and NAlLF:Cr3+ exhibits the best thermal stability, which maintains 82% of its initial intensity at 423 K. The Huang–Rhys factor of NAlLF:Cr3+ exhibits a rather low EPC. The output power and photoelectric conversion efficiency of the packaged NIR pc-LEDs could achieve 149 mW and 14.3% at 350 mA. Under the irradiation of NIR light, clear images of blood vessel distribution of palm and arm were obtained, implying that these phosphors have great application potential in the biomedical field.

Graphical abstract: Cr3+-activated Na3X2Li3F12 (X = Al, Ga, or In) garnet phosphors with broadband NIR emission and high luminescence efficiency for potential biomedical application

Supplementary files

Article information

Article type
Paper
Submitted
11 Aug 2021
Accepted
04 Oct 2021
First published
05 Oct 2021

J. Mater. Chem. C, 2021,9, 15230-15241

Cr3+-activated Na3X2Li3F12 (X = Al, Ga, or In) garnet phosphors with broadband NIR emission and high luminescence efficiency for potential biomedical application

W. Nie, Y. Li, J. Zuo, Y. Kong, W. Zou, G. Chen, J. Peng, F. Du, L. Han and X. Ye, J. Mater. Chem. C, 2021, 9, 15230 DOI: 10.1039/D1TC03763C

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements