Abstract
A series of Sm doped ZnO based thermoelectric materials were prepared by mechanical alloying and spark plasma sintering. The effects of Sm doping on ZnO based thermoelectric materials were systematically studied by means of electrical and thermal properties tests combined with first principles calculations of energy band, density of states and elastic constants. The experimental results show that the substitution of Sm at Zn site could cause the valence band and conduction band moving down, and the 4f orbitals of Sm could contribute to the increase of the density of states near the Fermi level, corresponding to the increase of carrier concentration and electrical conductivity. The substitution of Sm at Zn site could cause the decrease of effective mass and Seebeck coefficient. The substitution of Sm at Zn site could lead to the decrease of Young’s modulus and lattice thermal conductivity, which contribute to the decrease of thermal conductivity. Finally, the highest dimensionless thermoelectric figure of merit (ZT) value has been increased to 0.346, which is 3.48 times as pristine ZnO.
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References
Snyder GJ, Ursell TS. Thermoelectric Efficiency and Compatibility[J]. Phys. Rev. Lett., 2003, 91(14): 148 301
Li JF, Liu WS, Zhao LD, et al. High-performance Nanostructured Thermoelectric Materials[J]. NPG Asia Mater., 2010, 2(4): 152–158
Jiang HY, Long HS, Zhang LM. Effects of Solid-state Reaction Synthesis Processing Parameters on Thermoelectric Properties of Mg2Si[J]. J. Wuhan Univ. Technol., 2004, 19(002): 55–56
Alam H, Ramakrishna S. A Review on the Enhancement of Figure of Merit from Bulk to Nano-thermoelectric Materials[J]. Nano Energy, 2013, 2(2): 190–212
Qi X, Zeng L, Hui W, et al. Thermoelectric Properties of Ca3Co4O9 Ceramics[J]. Wuhan Univ. Technol., 2010, 25(2): 287–290
Feng Y, Jiang X, Ghafari E, et al. Metal Oxides for Thermoelectric Power Generation and Beyond[J]. Adv. Compos. Hybri. Mater., 2018, 1(1): 114–126
Tang XF, Song B, Zhang QJ. Effect of Y(Yttrium) Filling Fraction on Thermoelectric Properties of p-type YyFexCo4−xSb12[J]. Wuhan Univ. Technol., 2006, 21(4): 64–67
Ruan X, Xiao W. Preparation and Thermoelectric Properties of SiC2/beta-Zn4Sb3 Nanocomposite Materials[J]. Wuhan Univ. Technol., 2009, 24(5): 694–697
Ohta H, Seo WS, Koumoto K. Thermoelectric Properties of Homologous Compounds in the ZnO-In2O3 System[J]. J. Am. Ceram. Soc., 1996, 79(8): 2 193–2 196
Cai KF, Müller E, Drašar C, et al. Preparation and Thermoelectric Properties of Al-doped ZnO Ceramics[J]. Mater. Sci. Eng. B, 2003, 104(1–2): 45–48
Tsubota T, Ohtaki M, Eguchi K, et al. Thermoelectric Properties of Al-doped ZnO as a Promising Oxidematerial for High-temperature Thermoelectric Conversion[J]. J. Mater. Chem., 1997, 7(1): 85–90
Colder H, Guilmeau E, Harnois C, et al. Preparation of Ni-doped ZnO Ceramics for Thermoelectric Applications[J]. J. Eur. Ceram. Soc., 2011, 31(15): 2 957–2 963
Bérardan D, Byl C, Dragoe N. Influence of the Preparation Conditions on the Thermoelectric Properties of Al-doped ZnO[J]. J. Am. Ceram. Soc., 2010, 93(8): 2 352–2 358
Nam WH, Lim YS, Choi SM, et al. High-temperature Charge Transport and Thermoelectric Properties of a Degenerately Al-doped ZnO Nanocomposite[J]. J. Mater. Chem., 2012, 22(29): 14 633–14 638
Park K, Seong JK, Nahm S. Improvement of Thermoelectric Properties with the Addition of Sb to ZnO[J]. J. Alloy. Compd., 2008, 455(1–2): 331–335
Liang X. Thermoelectric Transport Properties of Fe-enriched ZnO with High-temperature Nanostructure Refinement[J]. ACS appl. Mater. Interface, 2015, 7(15): 7 927–7 937
Feng B, Li G, Hou Y, et al. Enhanced Thermoelectric Properties of Sb-doped BiCuSeO due to Decreased Band Gap[J]. J. Alloy. Compd., 2017, 712: 386–393
Feng B, Jiang X, Pan Z, et al. Preparation, Structure, and Enhanced Thermoelectric Properties of Sm-doped BiCuSeO Oxyselenide[J]. Mater. Des., 2020, 185: 108 263
Martin J, Wang L, Chen L, et al. Enhanced Seebeck Coefficient Through Energy-barrier Scattering in PbTe Nanocomposites[J]. Phys. Rev. B, 2009, 79(11): 115 311
Pan L, Bérardan D, Zhao L, et al. Influence of Pb Doping on the Electrical Transport Properties of BiCuSeO[J]. Appl. Phys. Lett., 2013, 102(2): 023 902
Feng B, Li G, Hou Y, et al. Enhanced Thermoelectric Properties of Sb-doped BiCuSeO due to Decreased Band Gap[J]. J. Alloy. Compd., 2017, 712: 386–393
Feng B, Li G, Pan Z, et al. Enhanced Thermoelectric Performances in BiCuSeO Oxyselenides via Er and 3D Modulation Doping[J]. Ceram. Int., 2019, 45(4): 4 493–4 498
Pei YL, He J, Li JF, et al. High Thermoelectric Performance of Oxy-selenides: Intrinsically Low Thermal Conductivity of Ca-doped BiCuSeO[J]. NPG Asia Mater., 2013, 5(5): e47
Li J, Sui J, Pei Y, et al. A high Thermoelectric Figure of Merit ZT > 1 in Ba Heavily Doped BiCuSeO Oxyselenides[J]. Energ. Environ. Sci., 2012, 5(9): 8 543–8 547
Zhao LD, He J, Berardan D, et al. BiCuSeO Oxyselenides: New Promising Thermoelectric Materials[J]. Energ. Environ. Sci., 2014, 7(9): 2 900–2 924
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Funded by the Natural Science Foundation of Hubei Province (2021CFB009), and the Guiding Project of Hubei Province in 2022 and the School Youth Fund of Wuhan Donghu University
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Feng, B., Mao, W. Effects of Sm Doping to Improve the Thermoelectric Properties of ZnO Ceramics. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 37, 1166–1171 (2022). https://doi.org/10.1007/s11595-022-2648-2
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DOI: https://doi.org/10.1007/s11595-022-2648-2