期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 124, 期 31, 页码 17364-17371出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.0c04668
关键词
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资金
- National Science Centre in Poland (NCN-Narodowe Centrum Nauki) [UMO-2019/33/B/ST5/02247]
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-xO4 doped 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.
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