Preparation and Photoluminescent Properties of Tb3+-Doped Lu2W3O12 and Lu2Mo3O12 Green Phosphors

Nihui Huang; Guojun Lu; Bihai Bai; Zijun Chen; Min Zhang; Yuechan Li; Chunyan Cao; An Xie

doi:10.3390/chemosensors10120533

Chemosensors (Dec 2022)

Preparation and Photoluminescent Properties of Tb3+-Doped Lu2W3O12 and Lu2Mo3O12 Green Phosphors

Nihui Huang,
Guojun Lu,
Bihai Bai,
Zijun Chen,
Min Zhang,
Yuechan Li,
Chunyan Cao,
An Xie

Affiliations

Nihui Huang: Fujian Key Laboratory of Functional Materials and Applications, School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China
Guojun Lu: Department of Fundamental Courses, Xiamen Donghai Institute, Xiamen 361112, China
Bihai Bai: Fujian Key Laboratory of Functional Materials and Applications, School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China
Zijun Chen: Fujian Key Laboratory of Functional Materials and Applications, School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China
Min Zhang: Fujian Key Laboratory of Functional Materials and Applications, School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China
Yuechan Li: Fujian Key Laboratory of Functional Materials and Applications, School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China
Chunyan Cao: Fujian Key Laboratory of Functional Materials and Applications, School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China
An Xie: Fujian Key Laboratory of Functional Materials and Applications, School of Materials Science and Engineering, Xiamen University of Technology, Xiamen 361024, China

DOI: https://doi.org/10.3390/chemosensors10120533
Journal volume & issue: Vol. 10, no. 12
p. 533

Abstract

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Tungstate and molybdate phosphors have received great attention for their excellent photoluminescent properties and thermal stabilities. In the article, Tb3+-activated tungstate and molybdate green phosphors were prepared by a solid-state reaction method at different caline temperatures and were compared and studied. The crystal structures and the morphologies of samples were characterized by X-ray diffraction (XRD) patterns and field emission scanning electron microscopy (FE-SEM) images. The energy-dispersive spectra (EDS) proved the compositions of the prepared samples. The photoluminescence (PL) spectra showed that the PL excitation spectra of Tb3+-doped Lu2W3O12 and Lu2Mo3O12 green phosphors consisted of a broad and strong charge transfer band (CTB) and 4f–5d transitions of Tb3+ in the ultraviolet (UV) wavelength range and some narrowed excitation peaks from the 4f–4f transition of Tb3+ in the near ultraviolet (NUV) wavelength region. The PL emission spectra of the phosphors exhibited the characteristic green emissions owing to the 5D4→7F5 transition of Tb3+ located at about 547 nm. The values of energy gap Eg were calculated based on the diffuse reflection spectra (DRS). The measuring temperature-dependent PL spectra illustrated the thermal stabilities of phosphors. The Tb3+-doped Lu2Mo3O12 phosphor presented normal thermal quenching phenomena and the values of the thermal activation energy Ea were calculated based on the measuring temperature dependent PL emission spectra. The Tb3+-doped Lu2W3O12 phosphor exhibited abnormal thermal enhancing CTB excitation intensity at about 170 °C. Furthermore, the PL decay curves suggested that the lifetime corresponding to the 5D4 level of Tb3+ in the Lu2W3O12 host lattice was longer than that in the Lu2Mo3O12 host lattice. Compared the Tb3+-doped Lu2Mo3O12 phosphor, the Tb3+-doped Lu2W3O12 phosphor has shown potential as an application in temperature sensors.

Published in Chemosensors

ISSN: 2227-9040 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Science: Chemistry: Organic chemistry: Biochemistry
Website: http://www.mdpi.com/journal/chemosensors

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