Issue 38, 2021
From the journal:

Dalton Transactions

Highly thermally stable Cr3+ and Yb3+ codoped Gd2GaSbO7 phosphors for broadband near-infrared applications

Xiudi Wu,ab   Shuang Zhao,*c   Liang Zhang,ab   Langping Dong,ab   Yonghui Xu,ab   Shuwen Yina  and  Hongpeng You ORCID logo *ab  

* Corresponding authors

a State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China

b University of Science and Technology of China, Hefei 230026, P. R. China

c Key Laboratory of Natural Medicine and Immune-Engineering of Henan Province, Henan University, Kaifeng 475004, Henan, P. R. China
E-mail: szhao@henu.edu.cn

Abstract

Gd2GaSbO7:Cr3+,Yb3+ phosphors with efficient broadband NIR emission were prepared by a solid-state reaction. Under the excitation of 448 nm, the Gd2GaSbO7:Cr3+ (GGS:Cr3+) phosphor exhibits a broadband NIR emission band centered at approximately 770 nm with a full width at half maximum (FWHM) of 160 nm. In addition, Yb3+ codoping can distinctly improve the photoluminescence properties of the GGS:Cr3+ phosphor, leading to broadening of the FWHM and greatly enhancing the thermal stability of the phosphor. Moreover, the energy conversion process of Cr3+ → Yb3+ ions was analyzed in detail, demonstrating that the energy transfer mechanism conformed to electric dipole–dipole interaction. The NIR pc-LEDs assembled with the GGS:Cr3+ phosphor and blue LED chips possessed a maximum NIR output power of ∼21 mW at 100 mA driving current, indicating promising applications of the synthesized phosphor in NIR pc-LEDs.

Graphical abstract: Highly thermally stable Cr3+ and Yb3+ codoped Gd2GaSbO7 phosphors for broadband near-infrared applications

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Article information

DOI
https://doi.org/10.1039/D1DT02259H
Article type
Paper
Submitted
08 Jul 2021
Accepted
20 Aug 2021
First published
21 Aug 2021

Dalton Trans., 2021,50, 13459-13467

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Highly thermally stable Cr3+ and Yb3+ codoped Gd2GaSbO7 phosphors for broadband near-infrared applications

X. Wu, S. Zhao, L. Zhang, L. Dong, Y. Xu, S. Yin and H. You, Dalton Trans., 2021, 50, 13459 DOI: 10.1039/D1DT02259H

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