Order–disorder transition and Fano-interference in thermoelectric Cu3SbSe3 nanoparticles

Samanta, K.; Gupta, Neha; Kaur, Harleen; Sharma, Lalit Kumar; Pandey, Sugandha Dogra; Singh, Jasveer; Senguttuvan, T. D.; Sharma, Nita Dilawar; Bandyopadhyay, A. K.

doi:10.1016/j.matchemphys.2014.11.042

Cited by 16 publications

(13 citation statements)

References 22 publications

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“…Cp is shown in Figure 5a. A peak appears at about 450 K which is because of the order-disorder transition of Cu atoms [14,23]. This transition was observed by a previous report [14] by hightemperature XRD.…”

Section: Resultssupporting

confidence: 64%

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Enhanced Thermoelectric Properties of Cu3SbSe3-Based Composites with Inclusion Phases

Ren

Tan

et al. 2016

Energies

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Cu 3 SbSe 3 -based composites have been prepared by self-propagating high-temperature synthesis (SHS) combined with spark plasma sintering (SPS) technology. Phase composition and microstructure analysis indicate that the obtained samples are mainly composed of Cu 3 SbSe 3 phase and CuSbSe 2 /Cu 2-x Se secondary phases. Our results show that the existence of Cu 2-x Se phase can clearly enhance the electrical conductivity of the composites (~16 S/cm), which is 2.5 times higher than the pure phase. The thermal conductivity can remain at about 0.30 W·m −1 ·K −1 at 653 K. A maximum ZT (defined as ZT = S 2 σT/κ, where S, σ, T, κ are the Seebeck coefficient, electrical conductivity, absolute temperature and total thermal conductivity) of the sample SPS 633 can be 0.42 at 653 K, which is 60% higher than the previously reported values. Our results indicate that the composite structure is an effective method to enhance the performance of Cu 3 SbSe 3 .

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Section: Resultssupporting

confidence: 64%

“…The dip in the Seebeck coefficients at~373 K is possibly caused by the disordered Cu atoms. Once heated to the temperature of 373 K, they start to move off from the original sites, which lead to the disorder situation gradually [23].…”

Section: Resultsmentioning

confidence: 99%

Enhanced Thermoelectric Properties of Cu3SbSe3-Based Composites with Inclusion Phases

Ren

Tan

et al. 2016

Energies

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“…3(a) together with the reported value from ref. 23,28 This transition has been conrmed by Kirkham et al 23 via hightemperature XRD where a nonlinear thermal expansion behavior is seen between 398 and 448 K and charge ipping analysis indicates that Cu atoms become disordered above the transition temperature. A well-dened peak at 450 K is observed, which was ascribed to the order-disorder transition of Cu atoms.…”

Section: Resultsmentioning

confidence: 80%

Is Cu₃SbSe₃ a promising thermoelectric material?

Wei

Sun

et al. 2015

RSC Adv.

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Cu 3 SbSe 3 , a compound with an ultralow thermal conductivity, has been predicted as a promising thermoelectric material, but relevant experimental results are inadequate. In this work we studied the high-temperature thermoelectric properties of this ternary chalcogenide. An extremely low thermal conductivity was observed and a glass-like behavior was seen above an order-disorder transition.Possible mechanisms causing such an ultralow thermal conductivity were discussed concerning the disorder of Cu atoms. With a large band gap of $0.95 eV obtained by an optical absorption edge measurement, Cu 3 SbSe 3 was found to be a nondegenerate p-type semiconductor, different from previous reports. A maximum zT of $0.25 was obtained at 650 K for Cu 3 SbSe 3 , which is much higher than the previously reported values, but this compound was considered inferior to Cu 3 SbSe 4 in its thermoelectric performance by comparing some key physical parameters. ExperimentalStoichiometric Cu, Sb and Se raw powders were mixed and sealed into quartz tubes that were evacuated and slowly heated up to 1273 K, soaked for 12 h and then quenched in water,

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“…The AISe NCs synthesized using oleic acid and oleyl amine showed nearly similar type of profile confirming their formation irrespective of capping agents applied. On the other hand, Cu 3 SbSe 3 NCs synthesized using oleic acid showed presence of broad peaks at 153 cm −1 and 240 cm −1 due to A g optical mode, 178 cm −1 and 210 cm −1 corresponds to the B 1g mode and peak at 263 cm −1 because of B 2g Raman mode . The CuSbSe 2 NCs showed well resolved spectrum with different peaks due to B 3g mode at 140 cm −1 , A g mode at 154 cm −1 and B 2g mode at 210 cm −1 and 216 cm −1[78a] [Figure (d)].…”

Section: Resultsmentioning

confidence: 99%

Reaction Tailoring for Synthesis of Phase‐Pure Nanocrystals of AgInSe₂, Cu₃SbSe₃ and CuSbSe₂

Kshirsagar

Khanna

2018

ChemistrySelect

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Present article highlights synthesis of phase pure I, III, VI2 and I, V, VI2 ternary selenides nanocrystals (NCs) using oleic acid and oleyl amine capping agents. The synthesis of AgInSe2 (AISe), Cu3SbSe3 and CuSbSe2 (CSSe) NCs was executed by employing cyclohexeno‐1,2,3‐selenadiazole (SDZ) as Se precursor. The current study is the first report describing use of thermally labile organoselenium compound for the synthesis of such technologically important ternary selenide NCs. Systematic study of the formation of AISe and CSSe NCs at different reaction time is carried out in order to confirm phase purity and stoichiometry. The spherical, stoichiometric and NIR active semiconductors showed formation of orthorhombic crystal structure as confirmed from XRD analysis. It was observed that formation of phase pure AISe NCs requires 5 hours (h) of constant heating at about 220οC irrespective of the capping agents however, CuSbSe2 was obtained within an hour in presence of oleyl amine at same reaction temperature. Nanocrystals were characterized by different analytical tools such as UV‐Visible spectroscopy, FTIR, XRD, SEM/EDS, TEM, particle size and XPS analysis. Based on the results, possible chemical reaction pathway for ternary chalcogenide is presented.

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Order–disorder transition and Fano-interference in thermoelectric Cu3SbSe3 nanoparticles

Cited by 16 publications

References 22 publications

Enhanced Thermoelectric Properties of Cu3SbSe3-Based Composites with Inclusion Phases

Enhanced Thermoelectric Properties of Cu3SbSe3-Based Composites with Inclusion Phases

Is Cu₃SbSe₃ a promising thermoelectric material?

Reaction Tailoring for Synthesis of Phase‐Pure Nanocrystals of AgInSe₂, Cu₃SbSe₃ and CuSbSe₂

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Order–disorder transition and Fano-interference in thermoelectric Cu3SbSe3 nanoparticles

Cited by 16 publications

References 22 publications

Enhanced Thermoelectric Properties of Cu3SbSe3-Based Composites with Inclusion Phases

Enhanced Thermoelectric Properties of Cu3SbSe3-Based Composites with Inclusion Phases

Is Cu3SbSe3 a promising thermoelectric material?

Reaction Tailoring for Synthesis of Phase‐Pure Nanocrystals of AgInSe2, Cu3SbSe3 and CuSbSe2

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Product

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Is Cu₃SbSe₃ a promising thermoelectric material?

Reaction Tailoring for Synthesis of Phase‐Pure Nanocrystals of AgInSe₂, Cu₃SbSe₃ and CuSbSe₂