Improvement in Thermoelectric Properties by Tailoring at In and Te Site in In2Te5

Sanchela, Anup V.; Thakur, Ajay D.; Tomy, C. V.

doi:10.1007/s11664-016-4778-9

Cited by 5 publications

(3 citation statements)

References 25 publications

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“…Recently, a large piezoelectric effect in this system was predicted (piezoelectric modulus d max = 351.7 pC/N, which is larger than around 120 pC/N of PbTiO 3 , one of the widely used piezoelectric ceramics) . Low thermal conductivity was experimentally observed though the measurement was performed for samples with a relatively low density. , …”

Section: Introductionmentioning

confidence: 95%

“…23 Low thermal conductivity was experimentally observed though the measurement was performed for samples with a relatively low density. 24,25 In this work, we study the lattice dynamics and thermal transport properties of In 2 Te 5 from insights provided by firstprinciples calculations. We have identified an extremely low thermal conductivity in the interlayer direction from both experiments and theoretical calculations.…”

Section: Introductionmentioning

confidence: 99%

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Unusual Lattice Dynamics and Anisotropic Thermal Conductivity in In₂Te₅ Due to a Layered Structure and Planar-Coordinated Te-Chains

et al. 2020

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Searching for novel materials with intrinsically low thermal conductivity and uncovering their origin is an essential way to realize high performance in various energy-related applications, including thermoelectrics. Understanding the role of different structural features in materials can assist us in designing thermal transport properties. Herein, we report thermal transport behavior of In 2 Te 5 , which is closely related to its layered zigzag structure and bonding in planar-coordinated Te-chains. The experimental thermal conductivity shows significant anisotropy for the measured two directions and an extremely low value in the interlayer direction of about 0.3 W m −1 K −1 at 673 K. The theoretical calculations of lattice thermal conductivity based on density functional theory support this behavior, and furthermore, they even reveal unprecedented anisotropy in the in-layer direction. We demonstrate that these thermal transport behaviors can be attributed to resonant bonding and lattice dynamics observed at the Te atoms in the planar-coordinated environment. Particularly strikingly, we discover a counterintuitive large positive and negative split of the Born effective charge (+8.7 and −5.1) at the adjacent Te atoms bonded covalently within the same plane. They induce a significant dipole interaction in the x-direction. Optical phonons are significantly softened in the specific direction by these characteristics in the Te-plane, which leads to large anisotropy in thermal transport. Our findings should encourage further excavation of novel features in lattice dynamics out of unexplored materials with complex structures.

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Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Unusual Lattice Dynamics and Anisotropic Thermal Conductivity in In₂Te₅ Due to a Layered Structure and Planar-Coordinated Te-Chains

et al. 2020

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“…29 In early theoretical and experimental work, researchers have mainly focused on the crystal structure, electrical conductivity, and thermoelectric properties of In 2 Te 5 . [30][31][32] Nowadays, it is proved that the In-Te system is an excellent candidate for optical applications with continuous exploration by researchers. 33 Unfortunately, no one has yet investigated the ability of In 2 Te 5 as a catalyst for photocatalytic water splitting.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic water splitting for hydrogen production with high efficiency monolayer In₂Te₅: a theoretical study

Zhang,

Tan,

et al. 2023

Phys. Chem. Chem. Phys.

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Direction-Dependent Thermoelectric Properties of a Layered Compound In2Te5 Single Crystal

Sanchela

Thakur

Tomy

2022

J. Electron. Mater.

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Improvement in Thermoelectric Properties by Tailoring at In and Te Site in In2Te5

Abstract: We study role of site substitutions at In and Te site in In 2 Te 5 on the thermoelectric behavior.

Cited by 5 publications

References 25 publications

Unusual Lattice Dynamics and Anisotropic Thermal Conductivity in In₂Te₅ Due to a Layered Structure and Planar-Coordinated Te-Chains

Unusual Lattice Dynamics and Anisotropic Thermal Conductivity in In₂Te₅ Due to a Layered Structure and Planar-Coordinated Te-Chains

Photocatalytic water splitting for hydrogen production with high efficiency monolayer In₂Te₅: a theoretical study

Direction-Dependent Thermoelectric Properties of a Layered Compound In2Te5 Single Crystal

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Improvement in Thermoelectric Properties by Tailoring at In and Te Site in In2Te5

Abstract: We study role of site substitutions at In and Te site in In 2 Te 5 on the thermoelectric behavior.

Cited by 5 publications

References 25 publications

Unusual Lattice Dynamics and Anisotropic Thermal Conductivity in In2Te5 Due to a Layered Structure and Planar-Coordinated Te-Chains

Unusual Lattice Dynamics and Anisotropic Thermal Conductivity in In2Te5 Due to a Layered Structure and Planar-Coordinated Te-Chains

Photocatalytic water splitting for hydrogen production with high efficiency monolayer In2Te5: a theoretical study

Direction-Dependent Thermoelectric Properties of a Layered Compound In2Te5 Single Crystal

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Unusual Lattice Dynamics and Anisotropic Thermal Conductivity in In₂Te₅ Due to a Layered Structure and Planar-Coordinated Te-Chains

Unusual Lattice Dynamics and Anisotropic Thermal Conductivity in In₂Te₅ Due to a Layered Structure and Planar-Coordinated Te-Chains

Photocatalytic water splitting for hydrogen production with high efficiency monolayer In₂Te₅: a theoretical study