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Title: Thermal Conductivity and Phonon Scattering Processes of ALD Grown PbTe–PbSe Thermoelectric Thin Films

Journal Article · · Advanced Functional Materials
ORCiD logo [1];  [2];  [2]; ORCiD logo [1]; ORCiD logo [3];  [3]; ORCiD logo [4];  [2]; ORCiD logo [5]
  1. Department of Mechanical and Aerospace Engineering University of Virginia Charlottesville VA 22904‐4746 USA
  2. Department of Electrical Computer Engineering Old Dominion University Norfolk VA 23529 USA
  3. Department of Materials Science and Engineering University of Virginia Charlottesville VA 22904‐4746 USA
  4. Applied Optical Plasma Sciences Sandia National Laboratories Albuquerque NM 87123 USA
  5. Department of Mechanical and Aerospace Engineering University of Virginia Charlottesville VA 22904‐4746 USA, Department of Materials Science and Engineering University of Virginia Charlottesville VA 22904‐4746 USA, Department of Physics University of Virginia Charlottesville VA 22904‐4746 USA

Abstract This work studies the thermal conductivity and phonon scattering processes in a series of n‐type lead telluride‐lead selenide (PbTe–PbSe) nanostructured thin films grown by atomic layer deposition (ALD). The ALD growth of the PbTe–PbSe samples in this work results in nonepitaxial films grown directly on native oxide/Si substrates, where the Volmer–Weber mode of growth promotes grains with a preferred columnar orientation. The ALD growth of these lead‐rich PbTe, PbSe, and PbTe–PbSe thin films results in secondary oxide phases, along with an increase microstructural quality with increased film thickness. The compositional variation and resulting point and planar defects in the PbTe–PbSe nanostructures give rise to additional phonon scattering events that reduce the thermal conductivity below that of the corresponding ALD‐grown control PbTe and PbSe films. Temperature‐dependent thermal conductivity measurements show that the phonon scattering in these ALD‐grown PbTe–PbSe nanostructured materials, along with ALD‐grown PbTe and PbSe thin films, are driven by extrinsic defect scattering processes as opposed to phonon–phonon scattering processes intrinsic to the PbTe or PbSe phonon spectra. The implication of this work is that polycrystalline, nanostructured ALD composites of thermoelectric PbTe–PbSe films are effective in reducing the phonon thermal conductivity, and represent a pathway for further improvement of the figure of merit ( ZT ), enhancing their thermoelectric application potential.

Sponsoring Organization:
USDOE
Grant/Contract Number:
DE‐NA0003525
OSTI ID:
1560697
Journal Information:
Advanced Functional Materials, Journal Name: Advanced Functional Materials Vol. 29 Journal Issue: 46; ISSN 1616-301X
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English
Citation Metrics:
Cited by: 22 works
Citation information provided by
Web of Science

References (40)

Lattice thermal conductivity of nanostructured thermoelectric materials based on PbTe journal April 2009
Intrinsic localized mode and low thermal conductivity of PbSe journal January 2017
Quasi-ballistic thermal transport from nanoscale interfaces observed using ultrafast coherent soft X-ray beams journal November 2009
Interplay between total thickness and period thickness in the phonon thermal conductivity of superlattices from the nanoscale to the microscale: Coherent versus incoherent phonon transport journal February 2018
Elastic mismatch induced reduction of the thermal conductivity of silicon with aluminum nano-inclusions journal May 2018
Raman spectra of lead chalcogenide single crystals journal November 2004
Thermal conductivity of symmetrically strained Si/Ge superlattices journal September 2000
Phonon dispersion effects and the thermal conductivity reduction in GaAs/AlAs superlattices journal August 2000
Thermal Conductivity Spectroscopy Technique to Measure Phonon Mean Free Paths journal August 2011
Coherent Phonon Heat Conduction in Superlattices journal November 2012
Heat transport in silicon from first-principles calculations journal August 2011
Precise control of highly ordered arrays of nested semiconductor/metal nanotubes journal December 2010
Thermal conductivity of periodic microporous silicon films journal February 2004
Microscopic description of thermal-phonon coherence: From coherent transport to diffuse interface scattering in superlattices journal July 2014
Complex thermoelectric materials journal February 2008
Thermophysical properties of polycrystalline PbS, PbSe, and PbTe in the temperature range 300?700 K journal September 1983
Thermoelectric quantum-dot superlattices with high ZT journal January 2000
Ballistic transport of long wavelength phonons and thermal conductivity accumulation in nanograined silicon-germanium alloys journal September 2017
Heat transport in thin dielectric films journal March 1997
Size dictated thermal conductivity of GaN journal September 2016
Thermal-conductivity measurements of GaAs/AlAs superlattices using a picosecond optical pump-and-probe technique journal March 1999
Minimum Thermal Conductivity of Superlattices journal January 2000
Analysis of heat flow in layered structures for time-domain thermoreflectance journal December 2004
Seebeck Coefficient Enhancement of ALD PbTe/PbSe Nanolaminate Structures Deposited inside Porous Silicon Templates journal January 2016
Boundary scattering effects during electron thermalization in nanoporous gold journal January 2011
Experimental Investigation of Size Effects on the Thermal Conductivity of Silicon-Germanium Alloy Thin Films journal November 2012
Pulse accumulation, radial heat conduction, and anisotropic thermal conductivity in pump-probe transient thermoreflectance journal November 2008
Pump-Probe Thermoreflectance journal January 2013
Lattice thermal conductivity reduction and phonon localizationlike behavior in superlattice structures journal January 2000
Role of Surface-Segregation-Driven Intermixing on the Thermal Transport through Planar Si / Ge Superlattices journal September 2013
From the Casimir Limit to Phononic Crystals: 20 Years of Phonon Transport Studies Using Silicon-on-Insulator Technology journal May 2013
Criteria for Cross-Plane Dominated Thermal Transport in Multilayer Thin Film Systems During Modulated Laser Heating journal May 2010
Direct Measurement of Room-Temperature Nondiffusive Thermal Transport Over Micron Distances in a Silicon Membrane journal January 2013
Thermal Conductivity in Nanoporous Gold Films during Electron-Phonon Nonequilibrium journal January 2008
Crossover from incoherent to coherent phonon scattering in epitaxial oxide superlattices journal December 2013
Bulk nanostructured thermoelectric materials: current research and future prospects journal January 2009
Phonon conduction in PbSe, PbTe, and PbTe 1 − x Se x from first-principles calculations journal May 2012
High-Thermoelectric Performance of Nanostructured Bismuth Antimony Telluride Bulk Alloys journal May 2008
Critical-point analysis of the two-phonon Raman spectrum of silicon journal January 1974
Thermal physics of the lead chalcogenides PbS, PbSe, and PbTe from first principles journal May 2014

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