Loading…
Phonon vibrations and photoluminescence emissions and their correlations with the electrical properties in Er3+ doped Bi3YO6 oxide-ion conductors
The phonon variations, photoluminescence emission and electrical properties were systematically studied in Er3+ doped Bi3YO6 (Bi3Y1−xErxO6) oxide-ion conductors. The unit cell parameters (a and V) undergo a first increase and subsequent decrease trend with x, which is attributed to the fluctuations...
Saved in:
Published in: | Solid state ionics 2020-01, Vol.344, p.115092, Article 115092 |
---|---|
Main Authors: | , , , , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
Summary: | The phonon variations, photoluminescence emission and electrical properties were systematically studied in Er3+ doped Bi3YO6 (Bi3Y1−xErxO6) oxide-ion conductors. The unit cell parameters (a and V) undergo a first increase and subsequent decrease trend with x, which is attributed to the fluctuations of the O occupation at 48i site. Five fundamental and new phonon mode splitting by Er3+ were observed by reflective FT-IR Reflectance spectroscopy, suggesting the locally structural distortion associated with the Er3+ octahedral occupancy. The Bi3Y1−xErxO6 ceramics of x = 0.2 exhibits the most intensive photoluminescence emission and a smallest activation energy of 1.1 eV. The high oxide-ion conductivity (>0.02 S/cm at 600 °C) was achieved, which can rival the most studied Yttria-stabilized zirconia (YSZ) system. The conductivities for all the Bi3Y1−xErxO6 ceramics present a curvature above 550 °C and a sudden decrease at x = 0.4. These changes in the conductivity were described intern of lattice vibrations for given oxide-ion systems. |
---|---|
ISSN: | 0167-2738 1872-7689 |
DOI: | 10.1016/j.ssi.2019.115092 |