Photoluminescence studies of Y2O3:Eu3+ under high pressure

Abstract

The Eu-doped yttria (Y2O3:Eu3+) has been investigated by the in situ high-pressure angle dispersive synchrotron X-ray diffraction (XRD) and the photoluminescence (PL) spectroscopy. The red shift and intensity ratio variation of emissions with increasing pressure were observed and elucidated. It was found that the red shift of emissions is related to the expansion of the f orbit of the Eu3+ and the intensity ratio variation of emissions is ascribed to the change of the crystal field under high pressure. The pressure-induced changes in spectrum are related to the phase transition, which was confirmed by XRD pattern. The two high pressure phases were identified as the monoclinic (C2/m) phase and hexagonal (P-3m1) phase by the Rietveld refinement.

Versatile and Switchable Responsive Properties of a Lanthanide‐Viologen Metal–Organic Framework

“…Another trend is the redshift of the emission peaks with increasing pressure. The shift of the main component (at about 610 nm) of the 5 D 0 → 7 F 2 transition (Figure c) is quasi‐linear with a shift rate of 0.41 nm Gpa −1 , falling within the range (0.1–1.2 nm Gpa −1 ) reported for Eu(III) doped in some inorganic host materials . The peaks shift back to the original wavelengths after decompression, suggesting the shift is irrelevant to the presence of radicals.…”

Study of the high pressure effect on nanoparticles GdVO4: Eu3+optical properties

“…The 5 D 0 → 7 F 1 , 5 D 0 → 7 F 3 , and 5 D 0 → 7 F 4 transition lines are henceforth neglected because they are disturbed by the sensor (SrFCl:Sm 2+ ) fluorescence. The spectra with the lines at about the same wavelength were observed in GdVO 4 :Eu 3+ microcrystal (14), GdVO4:Eu 3+ powders in size about 40 nm, and other materials doped with Eu 3+ like Y 2 O 3 :Eu 3+ crystal (15) and EuVO 4 crystal (16). In this work, we focus on the 619 nm emission because it is the line with the strongest emission.…”

Interpretation of europium(III) spectra

“…The study of the influence of pressure on the luminescence of europium-doped nanoparticles is a popular research topic [680][681][682][683][684][685][686]. Pressure changes have also an influence on the positions of the energy levels of the 4f 6 electronic configuration of Eu 3+ and on the position of the charge-transfer band [687][688][689][690][691][692][693][694][695][696]. The pressure-dependence of Eu 3+ luminescence was used to measure the residual stresses in thermal barrier coatings, near the interfaces between different layers [697].…”