Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.14365/1357
Title: Concentration based multicolor upconversion emission of lanthanides Co -doped Ruddlesden-Popper type layered perovskites
Authors: Saglam, Ozge
Keywords: Rare-earth doped materials
Layered perovskites
X-ray diffraction
Upconversion emission
Oxide Nanosheets
Building-Blocks
Rare-Earth
Luminescence
Nanoparticles
Light
K2la2ti3o10
Crystals
Design
Blue
Publisher: Elsevier
Abstract: Yb3+ ions initiated upconversion properties of Ruddlesden-Popper type layered materials were studied to elucidate the tunability of the visible emission under 980 nm excitation. The substitution of lanthanum ions in the host layer perovskites with different concentrations of Yb3+/Er3+ and Yb3+/Tm3+ as the sensitizer/activator pairs was performed via the solid-state procedure. The upconversion spectra of the samples have depicted that the materials relatively lower dopant concentrations of Yb3+/Er3+ have the green color, which was shifted to the red region due to both heavy activator and sensitizer concentrations because of the dominant F-4(9/2) -> I-4(15/2) transition rather than the H-2(11/2), S-4(3/2) -> I-4(15/2) transitions. The tunability of upconversion emission of Yb3+/ Tm3+ introduced materials was limited in the visible region compared to the Yb3+/Er3+ pair despite the fact that the wide variety of the lanthanide concentrations were studied and the layered materials were structured successfully. On the other hand, the first intense NIR emission was achieved for the layered perovskites co-doped with Yb3+/Tm3+ due to the H-3(4)-> H-3(6) relaxation.
URI: https://doi.org/10.1016/j.optmat.2020.110294
https://hdl.handle.net/20.500.14365/1357
ISSN: 0925-3467
1873-1252
Appears in Collections:Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

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