High thermoelectric performance of n–type SrTiO3 by Dy and Nb co–doping

Park, K.; Kim, D.H.; Gwon, S.Y.; Jeon, E.C.

doi:10.1016/j.inoche.2024.113041

Inorganic Chemistry Communications

2024

DOI: 10.1016/j.inoche.2024.113041

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High thermoelectric performance of n–type SrTiO3 by Dy and Nb co–doping

K. Park,

D.H. Kim,

S.Y. Gwon

et al.

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2024

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Structural and Optical Properties of SrTiO3-Based Ceramics for Energy and Electronics Applications

Kim,

Gwon,

Park

et al. 2024

Crystals

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A series of Sr1−xDyxTi1−yNbyO3−δ (0.05 ≤ x, y ≤ 0.10) samples were fabricated using cold compaction, followed by sintering in a (95% N2 + 5% H2) reducing atmosphere. We studied the crystal structure and optical properties of Sr1−xDyxTi1−yNbyO3−δ using X-ray diffraction (XRD) with Rietveld refinement, scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), and ultraviolet−visible−near-infrared (UV−VIS−NIR) spectroscopy. The sintered Sr1−xDyxTi1−yNbyO3−δ had a tetragonal structure (I4/mcm space group). In the sintered samples, Ti ions existed as a mixture of Ti3+ and Ti4+, and Nb ions existed as a mixture of Nb4+ and Nb5+. The band-gap energies decreased with increasing Dy/Nb concentrations. The incorporation of Ti and Nb ions, the formation of both Ti3+ and Nb4+ ions, and the reduction in band-gap energies are likely highly effective for increasing the electron concentration and the corresponding electrical conductivity. Sr1−xDyxTi1−yNbyO3−δ with high electrical conductivity is suitable for energy and electronics applications.

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Structural and Optical Properties of SrTiO3-Based Ceramics for Energy and Electronics Applications

Kim,

Gwon,

Park

et al. 2024

Crystals

View full text Add to dashboard Cite

show abstract

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High thermoelectric performance of n–type SrTiO3 by Dy and Nb co–doping

Cited by 1 publication

References 75 publications

Structural and Optical Properties of SrTiO3-Based Ceramics for Energy and Electronics Applications

Structural and Optical Properties of SrTiO3-Based Ceramics for Energy and Electronics Applications

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