Crystal structure and thermoelectric performance of p–type Bi0.86Ba0.14CuSeO/Cu2–Se composites

Hong, H.Y.; Kim, D.H.; Won, Sung Ok; Lee, J.K.; Park, S.D.; Choi, Soon‐Mok; Bae, Sang Hyun; Park, K.

doi:10.1016/j.jmrt.2021.04.016

Cited by 11 publications

(2 citation statements)

References 47 publications

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“…The lattice vibration is enhanced by temperature increases, which leads to increases of phonon scattering and results in the reduction of the lattice thermal conductivity. The ratio of the lattice thermal conductivity to the total thermal conductivity for the Bi 0.90 Pb 0.10 Cu 1– x Fe x SeO sample is calculated, as shown in Table S2. − The ratio generally decreases with increasing temperature. For instance, the calculated ratio when x = 0.02 ranges from 99.81 to 52.48% as the temperature increases from 298 to 873 K, indicating that the thermal transport properties of all samples at low temperatures are controlled by the lattice thermal conductivity.…”

Section: Resultsmentioning

confidence: 99%

Microwave Synthesis and Enhanced Thermoelectric Performance of p-Type Bi_0.90Pb_0.10Cu_1–xFe_xSeO Oxyselenides

Lei

Yang

Qiu

et al. 2022

ACS Appl. Mater. Interfaces

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BiCuSeO oxyselenide, one of the best oxygen-containing thermoelectric materials, is promising with great potential applications. In this work, we present a high ZT of >1.3 in Bi 0.90 Pb 0.10 Cu 0.96 Fe 0.04 SeO fabricated via microwave synthesis and subsequent spark plasma sintering (SPS). We added 3−4 atom % Fe to the Pb-doped BiCuSeO to regulate the hole carrier concentration and mobility to 0.8−1.0 × 10 20 cm −3 and ∼40 cm 2 V −1 S −1 , respectively, achieving moderate electrical conductivity, high Seebeck coefficient, and low carrier thermal conductivity simultaneously in a dual-doped sample. Under the synergistic enhancement by stress field, dislocation, and nanophase, the lattice thermal conductivity of Bi 0.90 Pb 0.10 Cu 0.96 Fe 0.04 SeO is limited to 0.24−0.49 W m −1 K −1 at 300−873 K. The development of efficient preparation methods for highperformance thermoelectric materials is significant to promote the application of thermoelectric conversion technology.

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Section: Resultsmentioning

confidence: 99%

Microwave Synthesis and Enhanced Thermoelectric Performance of p-Type Bi_0.90Pb_0.10Cu_1–xFe_xSeO Oxyselenides

Lei

Yang

Qiu

et al. 2022

ACS Appl. Mater. Interfaces

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“…For example, the electrical conductivities of the BLM-1033 samples with x = 0.05, 0.10 and 0.15 at 973 K are 4.27, 4.36 and 4.41 Ω −1 cm −1 , respectively. The electrical conductivity can be written as the following formula σ = neμ, where n is the hole concentration, μ is the hole mobility and e is the electronic charge [31][32][33]. The formula indicates that the hole concentration and mobility affect the electrical conductivity.…”

Section: Resultsmentioning

confidence: 99%

Influence of sintering temperature and Li⁺/Mg²⁺ doping on the thermoelectric properties of Bi_2−2xLi_xMg_xSr₂Co₂O_y

Hong

Gwon

Kim

et al. 2022

Advances in Applied Ceramics

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Bi 2−2x Li x Mg x Sr 2 Co 2 O y (x = 0.05, 0.10 and 0.15) samples are prepared by a solid-state reaction at various temperatures (1033-1133 K). All X-ray diffraction peaks can be indexed as the monoclinic Bi 2 Sr 2 Co 2 O y phase. The structural and thermoelectric properties of Bi 2−2x Li x Mg x Sr 2 Co 2 O y samples are systematically investigated, depending on the sintering temperature and the Li + /Mg 2+ concentration. A higher sintering temperature increases the hole concentration and hole mobility, whereas a higher Li + /Mg 2+ concentration increases the hole concentration and decreases the hole mobility. As the Li + /Mg 2+ concentration increases, the power factor of the samples sintered at 1033 K decreases, whereas that of the samples sintered at 1083 and 1133 K increases. Of the prepared samples, Bi 1.70 Li 0.15 Mg 0.15 Sr 2 Co 2 O y sintered at 1133 K shows the largest power factor (0.25 × 10 −4 W m −1 K −2 ) at 973 K. This power factor is 2.5 times greater than that of Bi 1.70 Li 0.15 Mg 0.15 Sr 2 Co 2 O y sintered at 1033 K (0.10 × 10 −4 W m −1 K −2 ) at 973 K.

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Modulation Doping Leads to Optimized Thermoelectric Properties in n‐Type Bi₆Cu₂Se₄O₆ due to Interface Effects

Zheng

Wang

Zhao

et al. 2023

Adv Funct Materials

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Heterogeneous composites consisting of Bi6Cu2Se3.6Cl0.4O6 and Bi2O2Se are prepared according to the concept of modulation doping. With prominently increased carrier mobility and almost unchanged effective mass, the electrical transport properties are considerably optimized resulting in a peak power factor ≈1.8 µW cm−1 K−2 at 873 K, although the carrier concentration is slightly deteriorated. Meanwhile, the lattice thermal conductivity is lowered to ≈0.62 W m−1 K−1 due to the introduction of the second phase. The modified Self‐consistent Effective Medium Theory is utilized to explain the deeper mechanism of modulation doping. The enhancement of apparent carrier mobility is derived from the highly active phase interfaces as fast carrier transport channels, while the reduced apparent thermal conductivity is ascribed to the existence of thermal resistance at the phase interfaces. Ultimately, an optimized ZT ≈0.23 is obtained at 873 K in Bi6Cu2Se3.6Cl0.4O6 + 13% Bi2O2Se. This research demonstrates the effectiveness of modulation doping for optimizing thermoelectric properties once again, and provides the direct microstructure observation and consistent theoretical model calculation to emphasize the role of interface effects in modulation doping, which should be probably applicable to other thermoelectrics.

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Crystal structure and thermoelectric performance of p–type Bi0.86Ba0.14CuSeO/Cu2–Se composites

Cited by 11 publications

References 47 publications

Microwave Synthesis and Enhanced Thermoelectric Performance of p-Type Bi_0.90Pb_0.10Cu_1–xFe_xSeO Oxyselenides

Microwave Synthesis and Enhanced Thermoelectric Performance of p-Type Bi_0.90Pb_0.10Cu_1–xFe_xSeO Oxyselenides

Influence of sintering temperature and Li⁺/Mg²⁺ doping on the thermoelectric properties of Bi_2−2xLi_xMg_xSr₂Co₂O_y

Modulation Doping Leads to Optimized Thermoelectric Properties in n‐Type Bi₆Cu₂Se₄O₆ due to Interface Effects

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Crystal structure and thermoelectric performance of p–type Bi0.86Ba0.14CuSeO/Cu2–Se composites

Cited by 11 publications

References 47 publications

Microwave Synthesis and Enhanced Thermoelectric Performance of p-Type Bi0.90Pb0.10Cu1–xFexSeO Oxyselenides

Microwave Synthesis and Enhanced Thermoelectric Performance of p-Type Bi0.90Pb0.10Cu1–xFexSeO Oxyselenides

Influence of sintering temperature and Li+/Mg2+ doping on the thermoelectric properties of Bi2−2xLixMgxSr2Co2Oy

Modulation Doping Leads to Optimized Thermoelectric Properties in n‐Type Bi6Cu2Se4O6 due to Interface Effects

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Microwave Synthesis and Enhanced Thermoelectric Performance of p-Type Bi_0.90Pb_0.10Cu_1–xFe_xSeO Oxyselenides

Microwave Synthesis and Enhanced Thermoelectric Performance of p-Type Bi_0.90Pb_0.10Cu_1–xFe_xSeO Oxyselenides

Influence of sintering temperature and Li⁺/Mg²⁺ doping on the thermoelectric properties of Bi_2−2xLi_xMg_xSr₂Co₂O_y

Modulation Doping Leads to Optimized Thermoelectric Properties in n‐Type Bi₆Cu₂Se₄O₆ due to Interface Effects