Band gap modification and ferroelectric properties of Bi0.5(Na,K)0.5TiO3-based by Li substitution
Source abstract
Abstract
We report on the reduction of band gap in Bi0.5(Na0.82-xLixK0.18)0.5(Ti0.95Sn0.05)O3 from 2.99 eV to 2.84 eV due to the substitutions of Li+ ions to Na+ sites. In addition, the lithium substitution samples exhibit an increasing of the maximal polarizations from 21.8 to 25.7 μC/cm2. The polarization enhancement of ferroelectric and reduction of the band gaps are strongly related to the Li substitution concentration as evaluated via the electronegative between A-site and oxygen and tolerance factor. The results are promising for photovoltaic and photocatalytic applications.
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Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Multiferroics and related materials · Microwave Dielectric Ceramics Synthesis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Ha Noi University of Science and Technology 1 Department of General Physics, School of Engineering Physics, , 1 Dai Co Viet road, Ha Noi, Viet Nam
Hanoi University of Science and Technology 2 International Training Institute for Materials Science, , 1 Dai Co Viet road, Hanoi, Vietnam
Hanautech Co., Ltd. 3 , 832, Tamnip-dong, Yuseong-gu, Daejeon, Republic of Korea
Vietnam Academy of Science and Technology 4 Institute of Materials Science, , 18 Hoang Quoc Viet street, Hanoi, Vietnam
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