-
Bi2Te3-based compounds are thermoelectric materials with the best performance near room temperature. The existence of a large number of complex defects makes defect engineering a core stratagem for adjusting and improving the thermoelectric performance. Therefore, understanding and effectively controlling the existence form and concentration of defects is crucial for achieving high-thermoelectric performance in Bi2Te3-based alloy. Herein, a series of Cl doped n-type quaternary Bi2–x SbxTe3–ySey compounds is synthesized by the zone-melting method. The correlation between defect evolution process and thermoelectric performance is systematically investigated by first-principles calculation and experiments. Alloying Sb on Bi site and Se on Te site induce charged structural defects, leading to a significant change in the carrier concentration. For Bi2–x SbxTe2.994Cl0.006 compounds, alloying Sb on Bi site reduces the formation energy of the
${\mathrm{S}}{{\text{b}}_{{\mathrm{Te}}}}_{_2}$ antisite defect, which generates the antisite defect${\mathrm{S}}{{\text{b}}_{{\mathrm{Te}}}}_{_2}$ and accompanied with the increase of the minority carrier concentration from 2.09×1016 to 3.99×1017 cm–3. The increase of the minority carrier severely deteriorates the electrical transport properties. In contrast, alloying Se in the Bi1.8Sb0.2Te2.994–ySeyCl0.006 compound significantly lowers the formation energy of the complex defect${\mathrm{S}}{{\mathrm{e}}_{{\mathrm{Te}}}}$ +${\mathrm{S}}{{\mathrm{b}}_{{\mathrm{Bi}}}}$ , which becomes more energetically favorable and suppresses the formation of the antisite defect${\mathrm{S}}{{\text{b}}_{{\mathrm{Te}}}}_{_2}$ . As a result, the concentration of minority carriers decreases to 1.46×1016 cm–3. This eliminates the deterioration effect of the minority carrier on the electrical transport properties of the material and greatly improves the power factor. A maximum power factor of 4.49 mW/(m·K2) is achieved for Bi1.8Sb0.2Te2.944Se0.05Cl0.006 compound at room temperature. By reducing thermal conductivity through intensifying the phonon scattering via alloying Sb and Se, the maximum ZT value of 0.98 is attained for Bi1.8Sb0.2Te2.844Se0.15Cl0.006 compound at room temperature. Our finding provides an important guidance for adjusting point defects, carrier concentrations, and thermoelectric performances in Bi2Te3-based compounds with complex compositions.-
Keywords:
- Bi2Te3-based compound /
- defect engineering /
- thermoelectric properties
[1] Liu S X, Tian J L, Wu S, Zhang W, Luo M Y 2022 Nano Energy 93 106812Google Scholar
[2] Hu B X, Shi X L, Zou J, Chen Z G 2022 Chem. Eng. J. 437 135268Google Scholar
[3] Chen W Y, Shi X L, Zou J, Chen Z G 2022 Mater. Sci. Eng., R 151 100700Google Scholar
[4] Han C G, Qian X, Li Q K, Deng B, Zhu Y B, Han Z J, Zhang W Q, Wang W C, Feng S P, Chen G, Liu W S 2020 Science 368 1091Google Scholar
[5] Zhang Q, Yuan M, Pang K, Zhang Y, Wang R, Tan X, Wu G, Hu H, Wu J, Sun P, Liu G Q, Jiang J 2023 Adv. Mater. 35 2300338Google Scholar
[6] Xie H Y, Hao S Q, Bao J K, Slade T J, Snyder G J, Wolverton C, Kanatzidis M G 2020 J. Am. Chem. Soc. 142 9553Google Scholar
[7] Xie H, Zhao L D, Kanatzidis M G 2024 Interdiscip. Mater. 1 24Google Scholar
[8] Liu Z, Hong T, Xu L, Wang S, Gao X, Chang C, Ding X, Xiao Y, Zhao L D 2022 Interdiscip. Mater. 2 161Google Scholar
[9] Suh J, Yu K M, Fu D Y, Liu X Y, Yang F, Fan J, Smith D J, Zhang Y H, Furdyna J K, Dames C, Walukiewicz W, Wu J Q 2015 Adv. Mater. 27 3681Google Scholar
[10] Tang X, Li Z, Liu W, Zhang Q, Uher C 2022 Interdiscip. Mater. 1 88Google Scholar
[11] Medlin D L, Yang N, Spataru C D, Hale L M, Mishin Y 2019 Nat. Commun. 10 1820Google Scholar
[12] Cheng Y, Cojocaru-Mirédin O, Keutgen J, Yu Y, Küpers M, Schumacher M, Golub P, Raty J Y, Dronskowski R, Wuttig M 2019 Adv. Mater. 31 1904316Google Scholar
[13] Shen J J, Hu L P, Zhu T J, Zhao X B 2011 Appl. Phys. Lett. 99 124102Google Scholar
[14] Zhu T J, Hu L P, Zhao X B, He J 2016 Adv. Sci. 3 1600004Google Scholar
[15] Horak J, Stary Z, Lošťák P, Pancíř J 1990 J. Phys. Chem. Solids 51 1353Google Scholar
[16] Starý Z, Horak J, Stordeur M, Stölzer M 1988 J. Phys. Chem. Solids 49 29Google Scholar
[17] Horak J, Čermák K, Koudelka L 1986 J. Phys. Chem. Solids 47 805Google Scholar
[18] Miller G R, Li C Y 1965 J. Phys. Chem. Solids 26 173Google Scholar
[19] Gobrecht H, Pantzer G, Boeters K E 1964 Z. Phys. 177 68Google Scholar
[20] Offergeld G, Van Cakenberghe J 1959 J. Phys. Chem. Solids 11 310Google Scholar
[21] 鲁志强, 刘可可, 李强, 胡芹, 冯丽萍, 张清杰, 吴劲松, 苏贤礼, 唐新峰 2023 无机材料学报 38 1331Google Scholar
Lu Z Q, Liu K K, Li Q, Hu Q, Feng L P, Zhang Q J, Wu J S, Su X L, Tang X F 2023 J. Inorg. Mater. 38 1331Google Scholar
[22] 李强, 陈硕, 刘可可, 鲁志强, 胡芹, 冯丽萍, 张清杰, 吴劲松, 苏贤礼, 唐新峰 2023 72 097101Google Scholar
Li Q, Chen S, Liu K K, Lu Z Q, Hu Q, Feng L P, Zhang Q J, Wu J S, Su X L, Tang X F 2023 Acta Phys. Sin. 72 097101Google Scholar
[23] Zhang Q, Cao F, Liu W, Lukas K, Yu B, Chen S, Opeil C, Broido D, Chen G, Ren Z 2012 J. Am. Chem. Soc. 134 10031Google Scholar
[24] Mehta R J, Zhang Y L, Karthik C, Singh B, Siegel R W, Borca-Tasciuc T, Ramanath G 2012 Nat. Mater. 11 233Google Scholar
[25] Heremans J P, Wiendlocha B, Chamoire A M 2012 Energy Environ. Sci. 5 5510Google Scholar
[26] Pei Y Z, Heinz N A, LaLonde A, Snyder G J 2011 Energy Environ. Sci. 4 3640Google Scholar
[27] Xie W J, Tang X F, Yan Y G, Zhang Q J, Tritt T M 2009 Appl. Phys. Lett. 94 102111Google Scholar
[28] Navratil J, Starý Z, Plechacek T 1996 Mater. Res. Bull. 31 1559Google Scholar
[29] Shen J J, Zhu T J, Zhao X B, Zhang S N, Yang S H, Yin Z Z 2010 Energy Environ. Sci. 3 1519Google Scholar
[30] Oh T S, Hyun D B, Kolomoets N V 2000 Scr. Mater. 42 849Google Scholar
[31] Hao F, Qiu P, Tang Y, Bai S, Xing T, Chu H S, Zhang Q, Lu P, Zhang T, Ren D, Chen J, Shi X, Chen L 2016 Energy Environ. Sci. 9 3120Google Scholar
[32] Hwang J Y, Kim J, Kim H S, Kim S I, Lee K H, Kim S W 2018 Adv. Energy Mater. 8 1800065Google Scholar
[33] Qin B, Wang D, Liu X, Qin Y, Dong J F, Luo J, Li J W, Liu W, Tan G J, Tang X F, Li J F, He J, Zhao L D 2021 Science 373 556Google Scholar
[34] Su X L, Wei P, Li H, Liu W, Yan Y G, Li P, Su C Q, Xie C J, Zhao W Y, Zhai P C, Zhang Q J, Tang X F, Uher C 2017 Adv. Mater. 29 23Google Scholar
[35] 陶颖, 祁宁, 王波, 陈志权, 唐新峰 2018 67 197201Google Scholar
Tao Y, Qi N, Wang B, Chen Z Q, Tang X F 2018 Acta Phys. Sin. 67 197201Google Scholar
[36] 杨东旺, 罗婷婷, 苏贤礼, 吴劲松, 唐新峰 2021 无机材料学报 36 991Google Scholar
Yang D W, Luo T T, Su X L, Wu J S, Tang X F 2021 J. Inorg. Mater. 36 991Google Scholar
[37] Kim H S, Gibbs Z M, Tang Y L, Wang H, Snyder G J 2015 APL Mater. 3 041506Google Scholar
[38] Witting I T, Ricci F, Chasapis T C, Hautier G, Snyder G J 2020 Research 2020 4361703Google Scholar
-
图 1 (a) 区熔法制备Bi2–x SbxTe2.994Cl0.006和Bi1.8Sb0.2Te2.994–ySeyCl0.006样品粉末X射线衍射图谱; (b) Bi1.8Sb0.2Te2.694Se0.3Cl0.006样品垂直于提拉方向自由断裂截面的场发射扫描电子显微镜照片; (c) Bi1.8Sb0.2Te2.694Se0.3Cl0.006样品抛光表面背散射电子图像(单位原子百分比)以及对应区域Bi, Sb, Se和Te等元素的面分布图像
Figure 1. (a) Powder XRD patterns of Bi2–x SbxTe2.994Cl0.006 and Bi1.8Sb0.2Te2.994–ySeyCl0.006 samples prepared by zone melting method; (b) field emission scanning electron microscope images of freshly fractured surfaces of the Bi1.8Sb0.2Te2.694Se0.3Cl0.006 sample measured perpendicular to the travel direction during zone melting; (c) backscattered electron image of polished surfaces for Bi1.8Sb0.2Te2.694Se0.3Cl0.006 sample and the corresponding elemental mapping images for Bi, Sb, Se and Te, respectively.
图 2 Bi2–x SbxTe2.994Cl0.006和Bi1.8Sb0.2Te2.994–ySeyCl0.006样品的电输运性能 (a), (b) 电导率; (c), (d) Seebeck系数; (e), (f) 功率因子
Figure 2. Temperature-dependent electronic transport properties for Bi2–x SbxTe2.994Cl0.006 and Bi1.8Sb0.2Te2.994–ySeyCl0.006 samples: (a), (b) Electrical conductivity; (c), (d) Seebeck coefficient; (e), (f) power factor.
图 3 (a), (b) 室温载流子浓度及迁移率随Sb, Se含量的变化; (c) 室温下样品的塞贝克系数与载流子浓度的关系, 图中紫色实线、红色实线、黄色实线为不同态密度有效质量下基于单抛带模型计算的塞贝克系数与载流子浓度关系曲线
Figure 3. (a), (b) Hall carrier mobility and concentration change with respect to the Sb, Se content; (c) Seebeck coefficients as a function of the charge carrier concentration at 300 K, where the colored dash lines are Pisarenko plots based on the single parabolic band model with different effective mass.
表 1 Bi2–x SbxTe2.994Cl0.006和Bi1.8Sb0.2Te2.994–ySeyCl0.006样品的室温物理性能参数
Table 1. Room-temperature physic properties of Bi2–x SbxTe2.994Cl0.006 and Bi1.8Sb0.2Te2.994–ySeyCl0.006 samples.
Samples σ/(104 S·m–1) S/(μV·K–1) n/(1019 cm–3) μ/(cm2·V–1·s–1) κ/(W·m–1·K–1) m*/m0 x = 0 11.2 –214.0 1.06 568 1.84 0.51 x = 0.05 11.0 –209.6 0.91 750 1.75 0.45 x = 0.10 9.94 –216.4 0.88 706 1.72 0.45 x = 0.15 9.16 –223.2 0.82 698 1.58 0.45 x = 0.20 5.79 –210.0 0.64 661 1.66 0.36 y = 0.05 8.97 –223.1 1.16 481 1.42 0.57 y = 0.10 8.46 –223.6 1.95 271 1.41 0.80 y = 0.15 9.94 –209.9 2.35 264 1.35 0.86 y = 0.20 8.82 –215.8 2.57 214 1.45 0.94 y = 0.25 8.68 –217.4 1.92 282 1.33 0.66 y = 0.30 9.15 –207.2 1.80 318 1.30 0.70 -
[1] Liu S X, Tian J L, Wu S, Zhang W, Luo M Y 2022 Nano Energy 93 106812Google Scholar
[2] Hu B X, Shi X L, Zou J, Chen Z G 2022 Chem. Eng. J. 437 135268Google Scholar
[3] Chen W Y, Shi X L, Zou J, Chen Z G 2022 Mater. Sci. Eng., R 151 100700Google Scholar
[4] Han C G, Qian X, Li Q K, Deng B, Zhu Y B, Han Z J, Zhang W Q, Wang W C, Feng S P, Chen G, Liu W S 2020 Science 368 1091Google Scholar
[5] Zhang Q, Yuan M, Pang K, Zhang Y, Wang R, Tan X, Wu G, Hu H, Wu J, Sun P, Liu G Q, Jiang J 2023 Adv. Mater. 35 2300338Google Scholar
[6] Xie H Y, Hao S Q, Bao J K, Slade T J, Snyder G J, Wolverton C, Kanatzidis M G 2020 J. Am. Chem. Soc. 142 9553Google Scholar
[7] Xie H, Zhao L D, Kanatzidis M G 2024 Interdiscip. Mater. 1 24Google Scholar
[8] Liu Z, Hong T, Xu L, Wang S, Gao X, Chang C, Ding X, Xiao Y, Zhao L D 2022 Interdiscip. Mater. 2 161Google Scholar
[9] Suh J, Yu K M, Fu D Y, Liu X Y, Yang F, Fan J, Smith D J, Zhang Y H, Furdyna J K, Dames C, Walukiewicz W, Wu J Q 2015 Adv. Mater. 27 3681Google Scholar
[10] Tang X, Li Z, Liu W, Zhang Q, Uher C 2022 Interdiscip. Mater. 1 88Google Scholar
[11] Medlin D L, Yang N, Spataru C D, Hale L M, Mishin Y 2019 Nat. Commun. 10 1820Google Scholar
[12] Cheng Y, Cojocaru-Mirédin O, Keutgen J, Yu Y, Küpers M, Schumacher M, Golub P, Raty J Y, Dronskowski R, Wuttig M 2019 Adv. Mater. 31 1904316Google Scholar
[13] Shen J J, Hu L P, Zhu T J, Zhao X B 2011 Appl. Phys. Lett. 99 124102Google Scholar
[14] Zhu T J, Hu L P, Zhao X B, He J 2016 Adv. Sci. 3 1600004Google Scholar
[15] Horak J, Stary Z, Lošťák P, Pancíř J 1990 J. Phys. Chem. Solids 51 1353Google Scholar
[16] Starý Z, Horak J, Stordeur M, Stölzer M 1988 J. Phys. Chem. Solids 49 29Google Scholar
[17] Horak J, Čermák K, Koudelka L 1986 J. Phys. Chem. Solids 47 805Google Scholar
[18] Miller G R, Li C Y 1965 J. Phys. Chem. Solids 26 173Google Scholar
[19] Gobrecht H, Pantzer G, Boeters K E 1964 Z. Phys. 177 68Google Scholar
[20] Offergeld G, Van Cakenberghe J 1959 J. Phys. Chem. Solids 11 310Google Scholar
[21] 鲁志强, 刘可可, 李强, 胡芹, 冯丽萍, 张清杰, 吴劲松, 苏贤礼, 唐新峰 2023 无机材料学报 38 1331Google Scholar
Lu Z Q, Liu K K, Li Q, Hu Q, Feng L P, Zhang Q J, Wu J S, Su X L, Tang X F 2023 J. Inorg. Mater. 38 1331Google Scholar
[22] 李强, 陈硕, 刘可可, 鲁志强, 胡芹, 冯丽萍, 张清杰, 吴劲松, 苏贤礼, 唐新峰 2023 72 097101Google Scholar
Li Q, Chen S, Liu K K, Lu Z Q, Hu Q, Feng L P, Zhang Q J, Wu J S, Su X L, Tang X F 2023 Acta Phys. Sin. 72 097101Google Scholar
[23] Zhang Q, Cao F, Liu W, Lukas K, Yu B, Chen S, Opeil C, Broido D, Chen G, Ren Z 2012 J. Am. Chem. Soc. 134 10031Google Scholar
[24] Mehta R J, Zhang Y L, Karthik C, Singh B, Siegel R W, Borca-Tasciuc T, Ramanath G 2012 Nat. Mater. 11 233Google Scholar
[25] Heremans J P, Wiendlocha B, Chamoire A M 2012 Energy Environ. Sci. 5 5510Google Scholar
[26] Pei Y Z, Heinz N A, LaLonde A, Snyder G J 2011 Energy Environ. Sci. 4 3640Google Scholar
[27] Xie W J, Tang X F, Yan Y G, Zhang Q J, Tritt T M 2009 Appl. Phys. Lett. 94 102111Google Scholar
[28] Navratil J, Starý Z, Plechacek T 1996 Mater. Res. Bull. 31 1559Google Scholar
[29] Shen J J, Zhu T J, Zhao X B, Zhang S N, Yang S H, Yin Z Z 2010 Energy Environ. Sci. 3 1519Google Scholar
[30] Oh T S, Hyun D B, Kolomoets N V 2000 Scr. Mater. 42 849Google Scholar
[31] Hao F, Qiu P, Tang Y, Bai S, Xing T, Chu H S, Zhang Q, Lu P, Zhang T, Ren D, Chen J, Shi X, Chen L 2016 Energy Environ. Sci. 9 3120Google Scholar
[32] Hwang J Y, Kim J, Kim H S, Kim S I, Lee K H, Kim S W 2018 Adv. Energy Mater. 8 1800065Google Scholar
[33] Qin B, Wang D, Liu X, Qin Y, Dong J F, Luo J, Li J W, Liu W, Tan G J, Tang X F, Li J F, He J, Zhao L D 2021 Science 373 556Google Scholar
[34] Su X L, Wei P, Li H, Liu W, Yan Y G, Li P, Su C Q, Xie C J, Zhao W Y, Zhai P C, Zhang Q J, Tang X F, Uher C 2017 Adv. Mater. 29 23Google Scholar
[35] 陶颖, 祁宁, 王波, 陈志权, 唐新峰 2018 67 197201Google Scholar
Tao Y, Qi N, Wang B, Chen Z Q, Tang X F 2018 Acta Phys. Sin. 67 197201Google Scholar
[36] 杨东旺, 罗婷婷, 苏贤礼, 吴劲松, 唐新峰 2021 无机材料学报 36 991Google Scholar
Yang D W, Luo T T, Su X L, Wu J S, Tang X F 2021 J. Inorg. Mater. 36 991Google Scholar
[37] Kim H S, Gibbs Z M, Tang Y L, Wang H, Snyder G J 2015 APL Mater. 3 041506Google Scholar
[38] Witting I T, Ricci F, Chasapis T C, Hautier G, Snyder G J 2020 Research 2020 4361703Google Scholar
Catalog
Metrics
- Abstract views: 1716
- PDF Downloads: 43
- Cited By: 0