Green and red upconversion luminescence of Er3+-doped K0.5Na0.5NbO3 ceramics

Er3+ doped K0.5Na0.5NbO3 (KNN) lead-free piezoelectric ceramics were synthesized by the solid-state reaction method. The upconversion emission properties of Er3+ doped KNN ceramics were investigated as a function of Er3+ concentration and incident pumping power intensity. Bright green (~555nm) and r...

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Bibliographic Details
Published in:Ceramics international 2014-03, Vol.40 (2), p.2581-2584
Main Authors: Sun, Haiqin, Zhang, Qiwei, Wang, Xusheng, Gu, Mu
Format: Article
Language:English
Subjects:
A. Powders: solid state reaction and sintering
Bands
Bright tempering
C. Optical properties
Ceramics
D. Perovskites
Devices
Emission
Luminescence
Piezoelectricity
Upconversion
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Summary:Er3+ doped K0.5Na0.5NbO3 (KNN) lead-free piezoelectric ceramics were synthesized by the solid-state reaction method. The upconversion emission properties of Er3+ doped KNN ceramics were investigated as a function of Er3+ concentration and incident pumping power intensity. Bright green (~555nm) and red (670nm) upconversion emission bands were obtained under 980nm excitation at room temperature, which are attributed to (2H11/2, 4S3/2)→4I15/2 and 4F9/2→4I15/2 transitions, respectively. The upconversion emission intensity can be adjusted by changing Er3+ concentration, and the mechanism of upconversion processes involve not only a two-photon absorption but also a three-photon absorption. In addition to the admirable intrinsic piezoelectric properties of KNN, this kind of material may have potential application as a multifunctional device by integrating its upconversion and piezoelectric property.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2013.10.089