Enhanced thermoelectric properties in p‐type Bi0.4Sb1.6Te3 alloy by combining incorporation and doping using multi‐scale CuAlO2 particles

Song, Zhiming; Zhang, Qihao; Liu, Yuan; Zhou, Zhenxing; Lu, Xihong; Wang, Bijia; Jiang, Wan; Chen, Lidong

doi:10.1002/pssa.201600451

Cited by 7 publications

(3 citation statements)

References 48 publications

(56 reference statements)

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“…Figure A shows the temperature dependence of the Seebeck coefficient ( S ) and the electrical conductivity (σ) of CAO ceramic added with 9.5% glass. The positive value of the Seebeck coefficient in the entire measured temperature range indicates the hole conduction mechanism . Meanwhile, the Seebeck coefficient decreases with the increase in temperature, and varies in the range from 595.8 μV·K −1 to 510.9 μV·K −1 , much larger than that reported by Park, et al .…”

Section: Resultsmentioning

confidence: 52%

“…The positive value of the Seebeck coefficient in the entire measured temperature range indicates the hole conduction mechanism. 23 Meanwhile, the Seebeck coefficient decreases with the increase in temperature, and varies in the range from 595.8 lVÁK À1 to 510.9 lVÁK À1 , much larger than that reported by Park, et al 11 Besides, the conductivity increases from 0.041 SÁcm À1 to 0.91 SÁcm À1 .…”

Section: Resultsmentioning

confidence: 69%

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Improvement in electrical properties of thermoelectric CuAlO₂ ceramics aided by aluminosilicate glass

Zhu

Zheng

et al. 2018

Int J Applied Ceramic Tech

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Delafossite CuAlO2 (CAO) ceramics were fabricated by the solid‐state route, using aluminosilicate glass powders as a sintering aid to improve the sintering ability and electrical conductivity, at 1473 K for 3 hours. The CAO ceramics with glass addition obviously enhanced bulk density, grain size, and electrical conductivity. It is found that the conductivity of CAO ceramics increased with the increase in glass content under 9.5%, whereas it was over 9.5%, the conductivity went down. The glass coming up to 9.5% increased the sintering ability and the electrical conductivity which was increased by one order of magnitude, thus increasing the figure of merit ZT for thermoelectric performance of our CAO added with 9.5% glass up to 9.82 × 10−3 at 773 K, which is a high value among the CAO ceramics. Besides, the impedance analysis shows that the impedance of the CAO ceramic was controlled by its grain boundary.

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Section: Resultsmentioning

confidence: 52%

Section: Resultsmentioning

confidence: 69%

Improvement in electrical properties of thermoelectric CuAlO₂ ceramics aided by aluminosilicate glass

Zhu

Zheng

et al. 2018

Int J Applied Ceramic Tech

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“…Second, the n-type ternary Ag 0.5 Bi 0.5 Se , is incorporated not only to tune the p-type carrier concentration but also to enable the convergence of the valence bands , and the reduction of the lattice part κ L . Finally, the nanoparticle ZnO is introduced as a second phase ,− to promote the reduction of the κ L further.…”

Section: Introductionmentioning

confidence: 99%

Improved Thermoelectric Performance of P-type SnTe through Synergistic Engineering of Electronic and Phonon Transports

Ying

et al. 2022

ACS Appl. Mater. Interfaces

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SnTe has been regarded as a potential alternative to PbTe in thermoelectrics because of its environmentally friendly features. However, it is a challenge to optimize its thermoelectric (TE) performance as it has an inherent high hole concentration (n H ∼2 × 10 20 cm −3 ) and low mobility (μ H ∼18 cm 2 V −1 s −1 ) at room temperature (RT), arising from a high intrinsic Sn vacancy concentration and large energy separation between its light and heavy valence bands. Therefore, its TE figure of merit is only 0.38 at ∼900 K. Herein, both the electronic and phonon transports of SnTe were engineered by alloying species Ag 0.5 Bi 0.5 Se and ZnO in succession, thus increasing the Seebeck coefficient and, at the same time, reducing the thermal conductivity. As a result, the TE performance improves significantly with the peak ZT value of ∼1.2 at ∼870 K for the sample (SnGe 0.03 Te) 0.9 (Ag 0.5 Bi 0.5 Se) 0.1 + 1.0 wt % ZnO. This result proves that synergistic engineering of the electronic and phonon transports in SnTe is a good approach to improve its TE performance.

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Energy Filtering of Charge Carriers: Current Trends, Challenges, and Prospects for Thermoelectric Materials

Gayner

Amouyal

2019

Adv Funct Materials

358

231

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Exhaustive attempts are made in recent decades to improve the performance of thermoelectric materials that are utilized for waste heat-to-electricity conversion. Energy filtering of charge carriers is directed toward enhancing the material thermopower. This paper focuses on the theoretical concepts, experimental evidence, and the authors' view of energy filtering in the context of thermoelectric materials. Recent studies suggest that not all materials experience this effect with the same intensity. Although this effect theoretically demonstrates improvement of the thermopower, applying it poses certain constraints, which demands further research. Predicated on data documented in literature, the unusual dependence of the thermopower and conductivity upon charge carrier concentrations can be altered through the energy filtering approach. Upon surmounting the physical constraints discussed in this article, thermoelectric materials research may gain a new direction to enhance the power factor and thermoelectric figure of merit.

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Enhanced thermoelectric properties in p‐type Bi_0.4Sb_1.6Te₃ alloy by combining incorporation and doping using multi‐scale CuAlO₂ particles

Cited by 7 publications

References 48 publications

Improvement in electrical properties of thermoelectric CuAlO₂ ceramics aided by aluminosilicate glass

Improvement in electrical properties of thermoelectric CuAlO₂ ceramics aided by aluminosilicate glass

Improved Thermoelectric Performance of P-type SnTe through Synergistic Engineering of Electronic and Phonon Transports

Energy Filtering of Charge Carriers: Current Trends, Challenges, and Prospects for Thermoelectric Materials

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Enhanced thermoelectric properties in p‐type Bi0.4Sb1.6Te3 alloy by combining incorporation and doping using multi‐scale CuAlO2 particles

Cited by 7 publications

References 48 publications

Improvement in electrical properties of thermoelectric CuAlO2 ceramics aided by aluminosilicate glass

Improvement in electrical properties of thermoelectric CuAlO2 ceramics aided by aluminosilicate glass

Improved Thermoelectric Performance of P-type SnTe through Synergistic Engineering of Electronic and Phonon Transports

Energy Filtering of Charge Carriers: Current Trends, Challenges, and Prospects for Thermoelectric Materials

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Enhanced thermoelectric properties in p‐type Bi_0.4Sb_1.6Te₃ alloy by combining incorporation and doping using multi‐scale CuAlO₂ particles

Improvement in electrical properties of thermoelectric CuAlO₂ ceramics aided by aluminosilicate glass

Improvement in electrical properties of thermoelectric CuAlO₂ ceramics aided by aluminosilicate glass