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- Title
Synthesis and characterization of BaTi<sub>1−x</sub>Nb<sub>x</sub>O<sub>3</sub> ferroelectric perovskite oxides with tunable band gap, anomalous photovoltage, and enhanced energy storage.
- Authors
Mala, Deep; Singh, Chandra Bhal; Singh, Akhilesh Kumar
- Abstract
In this study, we investigated dense BaTi1−xNbxO3 ceramics prepared by the conventional solid-state reaction technique which shows energy storage properties and anomalous photovoltaic effect. Structural analysis of BaTi1−xNbxO3 compositions has been performed by fitting the XRD patterns with Rietveld method and all samples show coexisting tetragonal (P4 mm) and cubic (Pm-3 m) structures. Composition (x = 0.04) shows minimum band gap (2.4 eV), smaller than pure BaTiO3 ceramics which can be attributed to lattice distortion and oxygen vacancies. The improved breakdown strength and energy storage density is achieved for BaTi0.93Nb0.07O3 composition. This ferroelectric ceramic shows energy storage of 278.7 mJ/cm2 and high energy conversion efficiency (90.4%). The composition (x = 0.07) exhibit a very high photovoltage (26 V) under visible light wavelength. These findings provide a fresh approach to create high-performance functional ferroelectric materials for energy applications.
- Publication
Journal of Materials Science: Materials in Electronics, 2024, Vol 35, Issue 13, p1
- ISSN
0957-4522
- Publication type
Article
- DOI
10.1007/s10854-024-12636-y