Anisotropy of thermal conductivity in In2Se3 nanostructures

Hsin, Cheng Lun; Huang, Jianhao; Śpiewak, Piotr; Ciupiński, Ł.; Lee, Sheng‐Wei

doi:10.1016/j.apsusc.2019.07.233

Cited by 15 publications

(11 citation statements)

References 20 publications

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“…(b) In-plane ( k ∥ ) and out-of-plane ( k ⊥ ) thermal conductivity of 2D BA 2 PbI 4 hybrid perovskite crystals at 300 K. Orange, yellow, and blue denote the thermal conductivity of crystals measured by TTG in this study, crystalline thin films measured using TDTR, and single crystal calculated from EMD simulations in this study, respectively. (c) Anisotropic ratio ( k ∥ / k ⊥ ) vs average thermal conductivity ( k ave ) of BA 2 PbI 4 crystals and other layered single crystals. − …”

Section: Resultsmentioning

confidence: 99%

Remarkably Weak Anisotropy in Thermal Conductivity of Two-Dimensional Hybrid Perovskite Butylammonium Lead Iodide Crystals

et al. 2021

Nano Lett.

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Two-dimensional (2D) hybrid organic–inorganic perovskites consisting of alternating organic and inorganic layers are a new class of layered structures. They have attracted increasing interest for photovoltaic, optoelectronic, and thermoelectric applications, where knowing their thermal transport properties is critical. We carry out both experimental and computational studies on thermal transport properties of 2D butylammonium lead iodide crystals and find their thermal conductivity is ultralow (below 0.3 W m–1 K–1) with very weak anisotropy (around 1.5) among layered crystals. Further analysis reveals that the unique structure with the preferential alignment of organic chains and complicated energy landscape leads to moderately smaller phonon lifetimes in the out-of-plane direction and comparable phonon group velocities in in-plane and out-of-plane directions. These new findings may guide the future design of novel hybrid materials with desired thermal conductivity for various applications.

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Section: Resultsmentioning

confidence: 99%

Remarkably Weak Anisotropy in Thermal Conductivity of Two-Dimensional Hybrid Perovskite Butylammonium Lead Iodide Crystals

et al. 2021

Nano Lett.

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“…In Figure c, we plot the thermal conductivity anisotropy ratio as a function of average thermal conductivity for inorganic materials having anisotropic crystal structures. − ,− As demonstrated here, quasi-1D BTS is one of the most thermally insulating anisotropic crystalline material reported to date. In addition, its anisotropy ratio is significantly higher than that of other low thermal conductivity materials such as SnSe and Bi 2 Te 3 .…”

Section: Thermal Anisotropymentioning

confidence: 82%

“…The temperature-dependent thermal conductivity along the [100] direction has been adopted from Sun et al (b) Anisotropy ratio as a function of temperature for BTS, graphite, BP, and SnSe . (c) Anisotropy ratio as a function of average thermal conductivity for BTS and other inorganic materials − ,− with anisotropic crystal structure. The solid symbols represent measurements taken in this study and open symbols represent literature values.…”

Section: Thermal Anisotropymentioning

confidence: 99%

Orientation-Controlled Anisotropy in Single Crystals of Quasi-1D BaTiS₃

et al. 2022

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Low-dimensional materials with chain-like (one-dimensional) or layered (two-dimensional) structures are of significant interest due to their anisotropic electrical, optical, and thermal properties. One material with a chain-like structure, BaTiS3 (BTS), was recently shown to possess giant in-plane optical anisotropy and glass-like thermal conductivity. To understand the origin of these effects, it is necessary to fully characterize the optical, thermal, and electronic anisotropy of BTS. To this end, BTS crystals with different orientations (a- and c-axis orientations) were grown by chemical vapor transport. X-ray absorption spectroscopy was used to characterize the local structure and electronic anisotropy of BTS. Fourier transform infrared reflection/transmission spectra show a large in-plane optical anisotropy in the a-oriented crystals, while the c-axis oriented crystals were nearly isotropic in-plane. BTS platelet crystals are promising uniaxial materials for infrared optics with their optic axis parallel to the c-axis. The thermal conductivity measurements revealed a thermal anisotropy of ∼4.5 between the c- and a-axis. Time-domain Brillouin scattering showed that the longitudinal sound speed along the two axes is nearly the same, suggesting that the thermal anisotropy is a result of different phonon scattering rates.

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“…The capital and small letter represent In and Se atom, respectively. The 3R α‐In 2 Se 3 crystal shows the rhombohedral structure (a=4.05 Å, c=29.64 Å) with a space group R3m , presenting periodical cAbBc aBcCa bCaAb stacking [105] . Each QL layer thickness is about 9.87 Å for both 2H and 3R α‐In 2 Se 3 .…”

Section: Physical Propertiesmentioning

confidence: 99%

“…The 3R α-In 2 Se 3 crystal shows the rhombohedral structure (a = 4.05 Å, c = 29.64 Å) with a space group R3m, presenting periodical cAbBc aBcCa bCaAb stacking. [105] Each QL layer thickness is about 9.87 Å for both 2H and 3R α-In 2 Se 3 . Further, the trigonal β-In 2 Se 3 (1T) layered structure (a = 4.04 Å, c = 9.76 Å) belongs to the space group of P � 3m1 with aBcAb stacking along the c-direction.…”

Section: Structure and Phasementioning

confidence: 99%

Indium Selenide (In₂Se₃) – An Emerging Van‐der‐Waals Material for Photodetection and Non‐Volatile Memory Applications

Mukherjee

Koren

2022

Israel Journal of Chemistry

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The search for ultrathin and robust ferroelectrics leads to few promising two-dimensional (2D) materials. In 2 Se 3 has drawn special attention owing to the existence of intercoupled in-plane (IP) and out-of-plane (OOP) ferroelectricity in monolayer form, which makes it a potential candidate for emerging artificial intelligence, information processing and memory applications. In addition, the high optical absorption and phase-dependent visible to infrared bandgap become advantageous from optoelectronics point-of-view. This unique ferroelectric and optoelectronic coupling further leads to explore atomic-scale multifunctional devices. In this review, we summarized the progress of non-volatile memory (NVM) and photodetector devices, and their intercoupled applications using 2D In 2 Se 3 . We expect that this review will provide an insight towards the promising future of 2D ferroelectric-(opto)electronics and motivate researchers for further development towards industrial scale.

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Anisotropy of thermal conductivity in In2Se3 nanostructures

Cited by 15 publications

References 20 publications

Remarkably Weak Anisotropy in Thermal Conductivity of Two-Dimensional Hybrid Perovskite Butylammonium Lead Iodide Crystals

Remarkably Weak Anisotropy in Thermal Conductivity of Two-Dimensional Hybrid Perovskite Butylammonium Lead Iodide Crystals

Orientation-Controlled Anisotropy in Single Crystals of Quasi-1D BaTiS₃

Indium Selenide (In₂Se₃) – An Emerging Van‐der‐Waals Material for Photodetection and Non‐Volatile Memory Applications

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Anisotropy of thermal conductivity in In2Se3 nanostructures

Cited by 15 publications

References 20 publications

Remarkably Weak Anisotropy in Thermal Conductivity of Two-Dimensional Hybrid Perovskite Butylammonium Lead Iodide Crystals

Remarkably Weak Anisotropy in Thermal Conductivity of Two-Dimensional Hybrid Perovskite Butylammonium Lead Iodide Crystals

Orientation-Controlled Anisotropy in Single Crystals of Quasi-1D BaTiS3

Indium Selenide (In2Se3) – An Emerging Van‐der‐Waals Material for Photodetection and Non‐Volatile Memory Applications

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Product

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Orientation-Controlled Anisotropy in Single Crystals of Quasi-1D BaTiS₃

Indium Selenide (In₂Se₃) – An Emerging Van‐der‐Waals Material for Photodetection and Non‐Volatile Memory Applications