Highly thermostable Ba2Ln2Ge4O13:Dy3+ (Ln = Y, Gd) phosphors: Synthesis and optical properties

In this study, the pure powder Ba2Y2Ge4O13 (BYGO) is constructed using the lanthanide substitution of Y for Gd based on Ba2Gd2Ge4O13 (BGGO). The activator Dy3+ ions are solidly dissolved into the BYGO and BGGO hosts via occupying the Y3+ and Gd3+ sites, respectively. Under 352 nm excitation, the sim...

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Vydáno v:Ceramics international Ročník 49; číslo 19; s. 31898 - 31906
Hlavní autoři: Tang, Huan, Li, Hong, Song, Ruitong, Yang, Zhiqin, Zhao, Rui, Guo, Zewen, Li, Junpeng, Wang, Bo, Zhu, Jing
Médium: Journal Article
Jazyk:angličtina
Vydáno: Elsevier Ltd 01.10.2023
Témata:
Dysprosium
Germanate
Luminescent thermostability
Yellowish-white-emitting
Luminescent thermostability
Dysprosium
Yellowish-white-emitting
Germanate
ISSN:0272-8842, 1873-3956
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Shrnutí:In this study, the pure powder Ba2Y2Ge4O13 (BYGO) is constructed using the lanthanide substitution of Y for Gd based on Ba2Gd2Ge4O13 (BGGO). The activator Dy3+ ions are solidly dissolved into the BYGO and BGGO hosts via occupying the Y3+ and Gd3+ sites, respectively. Under 352 nm excitation, the similarity and difference of the yellowish-white-emitting behaviors of Dy3+ in the two host materials are discussed systematically. When Dy3+ concentration is greater than 0.07 mol, concentration quenching occurs due to the dipole–dipole interaction. Moreover, the luminescent temperature quenching investigation discloses that the BYGO/BGGO:0.07Dy3+ phosphors have favorable thermostability and resistance to chromaticity shifting. Therefore, the Ba2Ln2Ge4O13-based phosphors would be prospective yellowish-white-emitting fluorescent materials.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2023.07.152