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Polarization-induced enhancement of photoluminescence in Pr3+ doped ferroelectric diphase BaTiO3-CaTiO3 ceramics
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10.1063/1.4818793
/content/aip/journal/jap/114/7/10.1063/1.4818793
http://aip.metastore.ingenta.com/content/aip/journal/jap/114/7/10.1063/1.4818793
View: Figures

Figures

Image of FIG. 1.
FIG. 1.

The illustrate of the pellets with ITO electrodes.

Image of FIG. 2.
FIG. 2.

XRD patterns of (a) x = 0.5, (b) x = 0.6, (c) x = 0.7 of the 0.002 mol Pr doped BaCaTiO ceramics near the strongest tetragonal peak(110), labeled as T (110), and the strongest orthorhombic peak (121), labeled as O(121). Inset: the polarization (P) vs electric field (E) loops of the corresponding samples.

Image of FIG. 3.
FIG. 3.

BSEM micro-structure pictures of the BaCaTiO:Pr diphase ceramic pellets surface: (a) x = 0.40, (b)x = 0.70 {the tetragonal BaCaTiO (light grains) and orthorhombic BaCaTiO phase (dark grains)}.

Image of FIG. 4.
FIG. 4.

The Photoluminescence spectra of the BaCaTiO:Pr (x = 0.7) ceramic excited at 340 nm with the poling up (a) and down (b) directions.

Image of FIG. 5.
FIG. 5.

The ratio of the orthorhombic BaCaTiO:Pr to the tetragonal BaCaTiO:Pr and the enhanced factor at BaCaTiO:Pr (x = 0.4, 0.5, 0.6, 0.7) ceramics.

Image of FIG. 6.
FIG. 6.

UV-Vis diffuse reflectivity spectra of Pr doped BaCaTiO (x = 0.7) ceramics.

Image of FIG. 7.
FIG. 7.

XPS data of the Pr doped BaCaTiO(x = 0.7) ceramics. (a)Ca 2p spectra, (b) Ba 3d spectra, (c) O1s spectra, and (d) Ti 2p spectra.

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/content/aip/journal/jap/114/7/10.1063/1.4818793
2013-08-20
2014-04-24
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Polarization-induced enhancement of photoluminescence in Pr3+ doped ferroelectric diphase BaTiO3-CaTiO3 ceramics
http://aip.metastore.ingenta.com/content/aip/journal/jap/114/7/10.1063/1.4818793
10.1063/1.4818793
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