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Erschienen in:
31.12.2016
Strong up-conversion luminescence and electrical properties of SrBi4Ti4O15 multifunctional ceramics by Er3+ doping
Erschienen in: Journal of Materials Science: Materials in Electronics | Ausgabe 8/2017
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Abstract
Novel green-emitting piezoelectric ceramics of SrBi4−x
Er
x
Ti4O15 (SBT-xEr) were prepared. Strong up-conversion with bright green (524 and 548 nm) and a relatively weak red (660 nm) emission bands were obtained under 980 nm excitation at room temperature, which is attributed to the intra 4f–4f electronic transition of (2H11/2, 4S3/2)–4I15/2 and the transition from 4F9/2 to 4I15/2 of Er3+ ions, respectively. Simultaneously, Er3+ doping promotes the electrical properties. At 0.8 mol%Er, the optimal electric properties with high Curie temperature of T
c ~527 °C, large remanent polarization of 2P
r ~14.92 μC/cm2 and piezoelectric constant of d
33 ~17 pC/N was achieved. As a multifunctional material, Er3+ doped SBT showed a great potential to be used in 3D-display, bio-imaging, solid state laser and optical temperature sensor.