Electronic and Thermal Transport Properties of Complex Structured Cu‐Bi‐Se Thermoelectric Compound with Low Lattice Thermal Conductivity

Hwang, Jae-Yeol; Mun, Hyeona; Cho, Jung Young; Yang, Sang Sun; Lee, Kyu Hyoung; Kim, Sung Wng

doi:10.1155/2013/502150

Cited by 4 publications

(1 citation statement)

References 22 publications

(28 reference statements)

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“…Thermoelectric energy conversion has attracted much interest as a possible application for environmentally friendly electric-power generators and highly reliable, accurate temperature controllable refrigerators used as electronic devices because it is one of the simplest technologies applicable to energy conversion [1][2][3][4]. The efficiency of thermoelectricity is governed by a basic property of thermoelectric material, and the figure of merit of a thermoelectric material is defined by…”

Section: Introductionmentioning

confidence: 99%

Growth of Anodic Aluminum Oxide Templates and the Application in Fabrication of the BiSbTe-Based Thermoelectric Nanowires

Kuo¹,

Hsieh

Yang

et al. 2014

International Journal of Photoenergy

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A two-step electrochemical anodization was used to form the anodic aluminum oxide (AAO) thin films with nanotube arrays of self-organized honeycomb structure. Al foil was anodized in 10% sulfuric acid (H2SO4) and 3% oxalic acid (H2C2O4) at 25°C at constant voltage of 40 V for 60 min for two times. Ethylene glycol (C2H6O2) was used as a solution and 0.3 M potassium iodide (KI) was used to improve the solution’s conductivity. Different electrolyte concentrations of Bi(NO3)3-5H2O, SbCl3, and TeCl4were added into KI-C2H6O2solution and the cyclic voltammetry experiment was used to find the reduced voltages of Bi3+, Sb3+, and Te4+ions. The potentiostatic deposition and pulse electrodeposition (PED) processes were used to deposit the (Bi,Sb)2−xTe3+x-based materials. Field-emission scanning electron microscope and energy dispersive spectrometers were used to analyze the compositions of the deposited (Bi,Sb)2−xTe3+x-based materials. After finding the optimal deposition parameter of the PED process the AAO nanotube arrays were used as the templates to deposit the (Bi,Sb)2−xTe3+x-based thermoelectric nanowires.

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Section: Introductionmentioning

confidence: 99%

Growth of Anodic Aluminum Oxide Templates and the Application in Fabrication of the BiSbTe-Based Thermoelectric Nanowires

Kuo¹,

Hsieh

Yang

et al. 2014

International Journal of Photoenergy

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Structural optimization for thermoelectric properties in Cu-Bi-S pavonite compounds

Hwang

Ahn

Lee

et al. 2017

Journal of Alloys and Compounds

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Importance of crystal chemistry with interstitial site determining thermoelectric transport properties in pavonite homologue Cu–Bi–S compounds

et al. 2016

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The crystal chemistry of complex structured pavonite homologue Cu x+y Bi 5−y S 8 (1.2 ≤ x ≤ 1.4, 0.4 ≤ y ≤ 0.55) compounds with various crystallographic atomic sites was investigated in the context of their thermoelectric properties. We clarified the origins of the electronic and thermal transport properties of Cu x+y Bi 5−y S 8 compounds based on the change in the composition, which is strongly correlated with the occupancy of each atomic site. Ab initio calculations revealed that the narrow gap n-type semiconducting nature of Cu x+y Bi 5−y S 8 compounds originates from the presence of interstitial Cu ions. Structural refinements combined with transport measurements revealed that asymmetrical disorders of interstitial Cu ions have a large anisotropic thermal displacement factor, leading to an intrinsically low value (∼0.49 W m −1 K −1 ) and temperature-independent behavior of lattice thermal conductivity. Comprehensive structural analysis provided an elemental doping strategy focusing on interstitial sites. Thermoelectric properties were significantly enhanced by the simultaneous increase of power factor and decrease of lattice thermal conductivity.It is noted that structural factors, such as occupancy and thermal displacement parameter, of interstitial sites among the various crystallographic sites should be considered as primary characteristics in the crystal chemistry of complex structured crystals. Correspondingly, a peak ZT for the system was obtained in Cu 1.576 Zn 0.024 Bi 4.6 S 8 , which showed ∼30% enhancement over that of the pristine Cu x+y Bi 5−y S 8 compound.

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Electronic and Thermal Transport Properties of Complex Structured Cu‐Bi‐Se Thermoelectric Compound with Low Lattice Thermal Conductivity

Cited by 4 publications

References 22 publications

Growth of Anodic Aluminum Oxide Templates and the Application in Fabrication of the BiSbTe-Based Thermoelectric Nanowires

Growth of Anodic Aluminum Oxide Templates and the Application in Fabrication of the BiSbTe-Based Thermoelectric Nanowires

Structural optimization for thermoelectric properties in Cu-Bi-S pavonite compounds

Importance of crystal chemistry with interstitial site determining thermoelectric transport properties in pavonite homologue Cu–Bi–S compounds

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