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Journal of Sol-Gel Science and Technology
Erschienen in: Journal of Sol-Gel Science and Technology 3/2020

10.09.2020 | Original Paper: Sol-gel and hybrid materials for optical, photonic and optoelectronic applications

Elucidating the electronic structures and photoluminescence properties of single-phase ScF3:Dy3+, Eu3+, Ce3+ phosphors for LEDs

verfasst von: Rui Zhu, Zun Bi, Ke Jia, Yunfei Liu, Yinong Lyu

Erschienen in: Journal of Sol-Gel Science and Technology | Ausgabe 3/2020

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Abstract

A series of single-component ScF3:Dy3+, Eu3+, Ce3+ phosphors prepared by means of microwave hydrothermal method were explored for light-emitting diodes. The as-prepared samples were characterized via X-ray diffraction (XRD), scanning electron microscope (SEM), and photoluminescence (PL) spectroscopy. In order to rationalize the experimental results, first-principle calculations based on density functional theory had been carried out to discover electronic structures. PL performance of the RE3+-doped phosphors exhibited well-defined bands in the visible region. By adjusting the ratios of Ce/Dy/Eu, the color of the as-prepared phosphors can vary from blue (0.24, 0.23) to red (0.51, 0.30) across the white (0.34, 0.26) region according to the chromaticity coordinates. The results suggested that the Dy/Eu/Ce-doped ScF3 might act as down-convert phosphors for near ultraviolet light-emitting diodes, especially for white LEDs. What is more, it can also promote a deep comperhension of the relationship between structure and properties in ScF3-based phosphors.
Vorheriger Artikel Enhanced electrochemical performance of the YBa0.5Sr0.5Co1.4Cu0.6O5+δ cathode material by Sm0.2Ce0.8O1.9 incorporation for solid oxide fuel cells application

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Metadaten
Titel
Elucidating the electronic structures and photoluminescence properties of single-phase ScF3:Dy3+, Eu3+, Ce3+ phosphors for LEDs
verfasst von
Rui Zhu
Zun Bi
Ke Jia
Yunfei Liu
Yinong Lyu
Publikationsdatum
10.09.2020
Verlag
Springer US
Erschienen in
Journal of Sol-Gel Science and Technology / Ausgabe 3/2020
Print ISSN: 0928-0707
Elektronische ISSN: 1573-4846
DOI
https://doi.org/10.1007/s10971-020-05411-y

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