Broadband near-infrared emitting from Li1.6Zn1.6Sn2.8O8:Cr3+ phosphor by two-site occupation and Al3+ cationic regulation

Jun'an Lai; Junhe Zhou; Zhangwen Long; Jianbei Qiu; Dacheng Zhou; Yong Yang; Ke Zhang; Weihui Shen; Qi Wang

Materials & Design (Jul 2020)

Broadband near-infrared emitting from Li1.6Zn1.6Sn2.8O8:Cr3+ phosphor by two-site occupation and Al3+ cationic regulation

Jun'an Lai,
Junhe Zhou,
Zhangwen Long,
Jianbei Qiu,
Dacheng Zhou,
Yong Yang,
Ke Zhang,
Weihui Shen,
Qi Wang

Affiliations

Jun'an Lai: College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
Junhe Zhou: Nanjing Tech University, 30 South Puzhu Road, Nanjing 211816, China
Zhangwen Long: College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
Jianbei Qiu: College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; Key Lab. of Advanced Materials of Yunnan Province, Kunming 650093, China; Corresponding authors at: College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China.
Dacheng Zhou: College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; Key Lab. of Advanced Materials of Yunnan Province, Kunming 650093, China
Yong Yang: College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; Key Lab. of Advanced Materials of Yunnan Province, Kunming 650093, China
Ke Zhang: College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
Weihui Shen: College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
Qi Wang: College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China; Key Lab. of Advanced Materials of Yunnan Province, Kunming 650093, China; Corresponding authors at: College of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China.

Journal volume & issue: Vol. 192
p. 108701

Abstract

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Broadband sources of near-infrared (NIR) radiation have garnered considerable attention in medical applications and non-destructive analysis. In this work, we have synthesized a lithium zinc stannate phosphor Li1.6Zn1.6Sn2.8O8:Cr3+ (LZSO:Cr) for broadband NIR light sources. The LZSO:Cr phosphor exhibited broadband excitation band matches exceptionally well with the emission of commercial 450-nm blue light-emitting diode (LED) chips. As expected, the broadband emission of infrared radiation from 650 nm to 1200 nm was realized due to the unique crystal field environment, where Cr3+ ions were substituted in two distorted octahedral sites. The broad emission spectrum exhibited peaks around 830 nm and 930 nm with a full width at half maximum (FWHM) of ~190 nm and internal quantum efficiency of 53%. The FWHM could be tuned to ~220 nm by co-doping with Al3+ ions because of the crystal splitting. The luminescence properties including excitation, emission, decay time, and their relationship between the lattice crystal properties have also been investigated. A phosphor-converted LED (pc-LED) was packaged by combining the phosphor with a 450-nm blue LED chip, which proves the feasibility of our design strategy for broadband NIR light sources.

Published in Materials & Design

ISSN: 0264-1275 (Print); 1873-4197 (Online)
Publisher: Elsevier
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials
Website: https://www.journals.elsevier.com/materials-and-design

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