| Autor: |
Wujczyk, Marta, Watras, Adam, Boutinaud, Philippe, Bettinelli, Marco, Targonska, Sara, Hölsä, Jorma, Wiglusz, Rafal J. |
| Zdroj: |
The Journal of Physical Chemistry - Part C; August 2020, Vol. 124 Issue: 31 p17364-17371, 8p |
| Abstrakt: |
The paper discusses the origin of emission quenching and the formation of metal-to-metal charge-transfer states in yttrium orthovanadate-arsenates doped with Tb3+ions. For that purpose, a series of highly crystalline yttrium orthovanadate-arsenate nanoparticles (type YVxAs1–xO4, where x= 2–65 mol %) doped with Tb3+ions were prepared using the co-precipitation method. The structural and morphological properties of the particles were studied by means of X-ray powder diffraction (XRD), transmission electron microscopy (TEM), and scanning electron microscopy (SEM) techniques. The photoluminescence spectral and dynamical properties of YVxAs1–xO4doped with 1 mol % Tb3+ions were investigated in detail. It was found that the emission quenching is related to changes in the band gap and Tb3+-to-V5+metal-to-metal charge transfer. Further, the Tb3+-to-As5+metal-to-metal charge transfer was identified and rationalized based on different models. |
| Databáze: |
Supplemental Index |
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