Multifunctional Nd3+ substituted Na0.5Bi0.5TiO3 as lead-free ceramics with enhanced luminescence, ferroelectric and energy harvesting properties

Kandula, Kumara Raja and Asthana, Saket and Raavi, Sai Santosh Kumar (2018) Multifunctional Nd3+ substituted Na0.5Bi0.5TiO3 as lead-free ceramics with enhanced luminescence, ferroelectric and energy harvesting properties. RSC Advances, 8 (28). pp. 15282-15289. ISSN 2046-2069

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Abstract

Herein, we present comprehensive investigations of the optical and electrical properties of Nd3+ substitution in sodium bismuth titanate ceramics (NBNT) with varying Nd3+ concentration. The room temperature photoluminescence (PL) emission for both unpoled and poled samples is observed to be a maximum for an Nd3+ substitution of 1 mol%. Upon poling, the PL intensity is observed to be quenched, consistent with the obtained XRD data, indicating an electric-field induced structural ordering towards higher symmetry, confirmed with the help of structural refinement. The evaluated ferroelectric to relaxor and antiferroelectric relaxor T(F–R) was observed clearly from the poled dielectric–loss curve for the 1 mol% of Nd3+ substitution. Furthermore, the optimized NBNT exhibited a lower Ec and a higher off-resonance figure of merit (FOMoff) for energy harvesting by 12% and 30%, respectively, in comparison with un-doped NBT.

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IITH Creators:
IITH CreatorsORCiD
Asthana, Sakethttp://orcid.org/0000-0002-6420-3304
Raavi, Sai Santosh Kumarhttp://orcid.org/0000-0002-2496-9233
Item Type: Article
Subjects: Physics
Divisions: Department of Physics
Depositing User: Team Library
Date Deposited: 01 May 2018 11:58
Last Modified: 01 May 2018 11:58
URI: http://raiith.iith.ac.in/id/eprint/3894
Publisher URL: http://doi.org/10.1039/C8RA01349G
OA policy: http://www.sherpa.ac.uk/romeo/issn/2046-2069/
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