Upconversion luminescence and time decay study of Yb–Er-doped BaWO4 nanophosphor

Rare earth-doped phosphor materials have always remained in focus for excellent luminescence properties. Herein we have synthesized Yb 3+ and Er 3+ -doped BaWO 4 nanophosphor via facile hydrothermal method with red and green region emissions by 980 nm excitation. Red and green region emissions were...

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Published inJournal of materials science. Materials in electronics Vol. 33; no. 12; pp. 9641 - 9649
Main Authors De, Arnab, Dey, Arnab Kumar, Samanta, Bibek, Sur, Soumyadeep, Paul, Sourav, Adalder, Ashadul, Das, Swati, Ghorai, Uttam Kumar
Format Journal Article
LanguageEnglish
Published New York Springer US 01.04.2022
Springer Nature B.V
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Summary:Rare earth-doped phosphor materials have always remained in focus for excellent luminescence properties. Herein we have synthesized Yb 3+ and Er 3+ -doped BaWO 4 nanophosphor via facile hydrothermal method with red and green region emissions by 980 nm excitation. Red and green region emissions were observed due to 4 F 9/2  →  4 I 15/2 and 2 H 11/2 / 4 S 3/2  →  4 I 15/2 transitions, respectively, of Er 3+ , where Yb 3+ acts as a sensitizer. The sample characterization was done using X-Ray Diffraction (XRD), Fourier Transform Infrared Spectroscopy (FTIR), Transmission Electron Microscopy (TEM), and X-ray Photoelectron Spectroscopy (XPS) techniques. The consequences of different concentrations of activator ion (Er 3+ ) in BaWO 4 : Yb 3+ , Er 3+ were studied from luminescence perspective in detail. The intensity of overall emission varied with altering the power of excitation that influences the photon transfer pathways. It was found that two-photon processes control both red and green emissions in the upconversion process. Decay behavior for both the emission was investigated. Thus, the tunable photoluminescence property suggests its potential in optoelectronic applications.
ISSN:0957-4522
1573-482X
DOI:10.1007/s10854-021-07607-6