Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/28994
Title: Electric field-induced giant strain and photoluminescence-enhancement effect in rare-earth modified lead-free piezoelectric ceramics
Authors: Yao, Q
Wang, F
Xu, F
Leung, CM
Wang, T
Tang, Y
Ye, X
Xie, Y
Sun, D
Shi, W
Keywords: Ferroelectric polarization
Lead-free
Photoluminescence
Piezoelectric
Strain
Issue Date: 2015
Publisher: American Chemical Society
Source: ACS applied materials and interfaces, 2015, v. 7, no. 9, p. 5066-5075 How to cite?
Journal: ACS applied materials and interfaces 
Abstract: In this work, an electric field-induced giant strain response and excellent photoluminescence-enhancement effect was obtained in a rare-earth ion modified lead-free piezoelectric system. Pr3+-modified 0.93(Bi0.5Na0.5)TiO3-0.07BaTiO3 ceramics were designed and fabricated by a conventional fabrication process. The ferroelectric, dielectric, piezoelectric, and photoluminescence performances were systematically studied, and a schematic phase diagram was constructed. It was found the Pr3+ substitution induced a transition from ferroelectric a long-range order structure to a relaxor pseudocubic phase with short-range coherence structure. Around a critical composition of 0.8 mol % Pr3+, a giant reversible strain of ∼0.43% with a normalized strain Smax/Emax of up to 770 pm/V was obtained at ∼5 kV/mm. Furthermore, the in situ electric field enhanced the photoluminescence intensity by ∼40% in the proposed system. These findings have great potential for actuator and multifunctional device applications, which may also open up a range of new applications.
URI: http://hdl.handle.net/10397/28994
ISSN: 1944-8244
EISSN: 1944-8252
DOI: 10.1021/acsami.5b00420
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