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Photoluminescent and scintillant properties of highly transparent [(Y1‐xGdx)0.99Dy0.01]2O3 (x = 0 and 0.4) ceramics.
- Source :
-
Journal of the American Ceramic Society . Aug2019, Vol. 102 Issue 8, p4773-4780. 8p. 8 Graphs. - Publication Year :
- 2019
-
Abstract
- High‐optical‐quality ternary [(Y1‐xGdx)0.99Dy0.01]2O3 (x = 0 and 0.4) ceramics were successfully fabricated by vacuum sintering with in‐line transmittances of 71.4%‐75.1% at 574 nm, the wavelength of Dy3+ emission (the 4F9/2 → 6H13/2 transition). Substitution of Gd3+ for Y3+ significantly affected the photoluminescent and scintillant properties of the ceramics. Gd3+ addition effectively increased lattice parameters and theoretical densities of the ceramic samples; this contributed to enhanced X‐ray absorption coefficients. Both [(Y1‐xGdx)0.99Dy0.01]2O3 (x = 0 and 0.4) ceramics displayed typical Dy3+ emissions from 4F9/2 → 6HJ (J = 15/2, 13/2, 11/2) transitions under UV and X‐ray irradiations. By incorporating Gd3+ into the lattice, a stronger excitation peak of Gd3+ due to internal f‐f transitions relative to Dy3+ was observed at 276 nm; subsequent ceramics obtained a sharper PL intensity and a warmer hue via effective energy transfer from Gd3+ to Dy3+. Using a Gd3+ dopant generally reduces the total photoluminescence/photoluminescence excitation intensities and light output; it also delays the lifetime and afterglow of the transparent ceramics. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 00027820
- Volume :
- 102
- Issue :
- 8
- Database :
- Academic Search Index
- Journal :
- Journal of the American Ceramic Society
- Publication Type :
- Academic Journal
- Accession number :
- 136785213
- Full Text :
- https://doi.org/10.1111/jace.16357