Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/61963
Title: Tunable photoluminescence properties of Pr3+/Er3+-doped 0.93Bi0.5Na0.5TiO3-0.07BaTiO3 low-temperature sintered multifunctional ceramics
Authors: Wu, X
Chung, TH
Sun, H
Kwok, KW 
Keywords: Doped BNTBT
Energy transfer
Ferroelectrics
Multifunction
Photoluminescence
Issue Date: 2016
Publisher: Pergamon Press
Source: Ceramics international, 2016, v. 42, no. 8, p. 9899-9905 How to cite?
Journal: Ceramics international 
Abstract: Pr3+/Er3+-doped 0.93Bi0.5Na0.5TiO3-0.07BaTiO3 ceramics have been fabricated at a low sintering temperature of 960°C using a sintering aid of Li2CO3. The effects of energy transfer between Pr3+and Er3+on their photoluminescence properties have been investigated. Our results reveal that the down-conversion emissions of Pr3+are weakened and the lifetimes are shortened by the co-doping of Er3+. As a result, when both Pr3+and Er3+are excited simultaneously, with increasing the concentration of Er3+, the green emissions from Er3+increase but the red emissions from Pr3+decrease. Moreover, the emission color of the ceramics can be reversibly changed between red, yellow and yellowish green by using excitation sources of different wavelengths. Strong up-conversion green emissions with short lifetimes arisen from Er3+have also been observed for the ceramics under the excitation of 980nm. Owing to the Li2CO3 sintering aid, the low-temperature sintered ceramics also exhibit reasonably good ferroelectric and piezoelectric properties, and hence should be promising for multifunctional applications such as electro-optical coupling devices.
URI: http://hdl.handle.net/10397/61963
ISSN: 0272-8842
EISSN: 1873-3956
DOI: 10.1016/j.ceramint.2016.03.089
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