Tailoring the structure and thermoelectric properties of BaTiO3 via Eu2+ substitution
| Autor: | Anke Weidenkaff, Marco Scavini, Andrei V. Kovalevsky, Wenjie Xie, Zhicheng Zhong, Stefan Kilper, Marc Widenmeyer, Songhak Yoon, Philipp Hansmann, Stefano Checchia, Tianhua Zou, Xingxing Xiao |
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| Jazyk: | English, Middle (1100-1500) |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Condensed matter physics Band gap General Physics and Astronomy 02 engineering and technology Crystal structure 010402 general chemistry 021001 nanoscience & nanotechnology Polaron 01 natural sciences 0104 chemical sciences Thermal conductivity Electrical resistivity and conductivity Seebeck coefficient Thermoelectric effect Density of states Physical and Theoretical Chemistry 0210 nano-technology crystallography |
| Zdroj: | PCCP. Physical chemistry chemical physics 19 (2017): 13469–13480. doi:10.1039/c7cp00020k info:cnr-pdr/source/autori:Xiao, Xingxing; Widenmeyer, Marc; Xie, Wenjie; Zou, Tianhua; Yoon, Songhak; Scavini, Marco; Checchia, Stefano; Zhong, Zhicheng; Hansmann, Philipp; Kilper, Stefan; Kovalevsky, Andrei; Weidenkaff, Anke/titolo:Tailoring the structure and thermoelectric properties of BaTiO3 via Eu2+ substitution/doi:10.1039%2Fc7cp00020k/rivista:PCCP. Physical chemistry chemical physics (Print)/anno:2017/pagina_da:13469/pagina_a:13480/intervallo_pagine:13469–13480/volume:19 |
| DOI: | 10.1039/c7cp00020k |
| Popis: | A series of Ba1-xEuxTiO3-delta (0.1 of the parent unit cell as observed for BaTiO3. Density functional calculations delivered an insight into the electronic structure of Ba1-xEuxTiO3-delta. From the obtained density of states a significant reduction of the band gap by the presence of filled Eu2+ 4f states at the top of the valence band was observed. The physical property measurements revealed that barium-europium titanates exhibit n-type semiconducting behavior and at high temperature the electrical conductivity strongly depended on the Eu2+ content. Activation energies calculated from the electrical conductivity and Seebeck coefficient data indicate that at high temperatures (800 K < T < 1123 K) the conduction mechanism of Ba1-xEuxTiO3-delta (0.1 |
| Databáze: | OpenAIRE |
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