Effects of Different Amount of Se-doping on Microstructures and Thermoelectric Properties of n-type Bi2Te3-xSex

doi:10.15541/jim20140085

Abstract

Abstract:

A hydrothermal method combined with a subsequent spark plasma sintering technique was successfully utilized to synthesize selenium (Se) doped bismuth telluride (Bi₂Te_3-_xSe_x) (0≤x≤0.45). The influence of Se-doping on the composition and morphology of n-type Bi₂Te_3-_xSe_x was studied by X-ray diffraction, scanning electron microscope and transmission electron microscope. Thermoelectric properties of the as-prepared bulk Bi₂Te_3-_xSe_x nanocomposites were investigated in detail. Results showed that the grain became finer by the Se-doping. With increasing Se doping content, the electrical conductivity of bulk Bi₂Te_3-_xSe_x increased firstly and then decreased. Se-doping effectively reduced the thermal conductivity and improved the Seebeck coefficient to some extent. Consequently, a maximum ZT value of 0.57 was obtained from bulk Bi₂Te_2.7Se_0.3 at 475 K, which was increased by 159% as compared with pure bulk Bi₂Te₃.

Key words: bismuth telluride, Se-doping, hydrothermal synthesis, spark plasma sintering, thermoelectric properties

CLC Number:

TN304

ZHANG Qi-Hao, XU Lei-Lei, WANG Lian-Jun, JIANG Wan. Effects of Different Amount of Se-doping on Microstructures and Thermoelectric Properties of n-type Bi₂Te_3-_xSe_x[J]. Journal of Inorganic Materials, 2014, 29(11): 1139-1144.

Figures/Tables 8

Fig. 1 XRD patterns of Bi2Te3-xSex nanopowders being doped with different Se-doping contents

Fig. 2 FE-SEM and HRTEM images of Bi2Te3-xSex nano-powder being doped with different Se contents SEM images of (a) Bi2Te2.9Se0.1, (b) Bi2Te2.7Se0.3 and (c) Bi2Te2.55Se0.45, HRTEM image of (d) Bi2Te2.55Se0.45 nanopowder

Fig. 3 Fractured surfaces′ morphologies of bulk Bi2Te3-xSex being doped with different Se contents (a) Bi2Te3; (b) Bi2Te2.9Se0.1; (c) Bi2Te2.85Se0.15; (d) Bi2Te2.7Se0.3; (e) and (f) Bi2Te2.55Se0.45

Tables 1 Densities and relative densities of Bi2Te3-xSex bulk samples being doped with different Se contents

Sample	Bi₂Te₃	Bi₂Te_2.9Se_0.1	Bi₂Te_2.85Se_0.15	Bi₂Te_2.7Se_0.3	Bi₂Te_2.55Se_0.45
Density/(g·cm^-3)	7.820	7.755	7.760	7.753	7.759
Relative density	99.52%	98.92%	98.98%	99.02%	99.16%

Fig. 4 Temperature dependence of electrical conductivity for Bi2Te3-xSex bulk samples being doped with different Se contents

Fig. 5 Temperature dependence of Seebeck coefficient for Bi2Te3-xSex bulk samples being doped with different Se contents

Fig. 6 Temperature dependence of (a) thermal conductivity and (b) lattice thermal conductivity for Bi2Te3-xSex bulk samples being doped with different Se contents

Fig. 7 Temperature dependence of ZT for Bi2Te3-xSex bulk samples being doped with different Se contents

References 17

[1]	NOLAS G S, SHARP J, GOLDSMID H J. Thermoelectrics: Basic Principles and New Materials Developments. Springer: New York, 2001: 17-29.
[2]	POUDEL B, HAO Q, MA Y, et al. High-thermoelectric performance of nanostructured bismuth antimony telluride bulk alloys. Science, 2008, 320: 634-638.
[3]	HOU XIAN-HUA, HU SHE-JUN, RU QIANG, et al. Current status and development of Bi2Te3-based thermoelectric materials. Materials Review, 2007, 21(7): 111-118.
[4]	CHEN G, DRESSELHAUS M S, FLEURIAL J P, et al. Recent developments in thermoelectric materials. International Material Reviews, 2003, 48(1): 45-66.
[5]	MINNICH A J, DRESSELHAUS M S, REN Z F, et al. Bulk nanostructured thermoelectric materials: current research and future prospects. Energy Environ Sci, 2009, 2: 466-479.
[6]	SOOTSMAN J R, CHUNG D Y, KANATZIDIS M G. New and old concepts in thermoelectric materials. Angew. Chem. Int. Ed, 2009, 48: 8616-8639.
[7]	XIAO Y, POUDEL B, MA Y, et al. Experimental studies on anisotropic thermoelectric properties and structures of n-type Bi2Te2.7Se0.3. Nano Letters, 2010, 10(9): 3373-3378.
[8]	ZHANG Y C, WANG H, KRAEMER S, et al. Surfactant-free synthesis of Bi2Te3-Te micro-nano heterostructure with enhanced thermoelectric figure of merit. ACS Nano, 2011, 4: 3158-3165.
[9]	樊希安. (Bi, Sb)2(Te, Se)3系热电材料的制备及性能优化研究. 武汉: 华中科技大学博士学位论文, 2007.
[10]	LI D, QIN X Y, LIU Y F, et al. Improved thermoelectric properties for solution grown Bi2Te3-xSex nanoplatelet composites. RSC Adv., 2013, 3: 2632-2638.
[11]	MA Y, CHEN G, REN Z F, et al. Enhanced thermoelectric figure-of-merit in p-Type nanostructured bismuth antimony tellurium alloys made from elemental chunks. Nano Lett., 2008, 8: 2580-2584.
[12]	CAO Y Q, ZHAO X B, ZHANG X B, et al. Syntheses and thermoelectric properties of Bi2Te3/Sb2Te3 bulk nanocomposites with laminated nanostructure. Appl. Phys. Lett. , 2008, 92: 143106-1-3.
[13]	XIE W, TANG X, TRITT T M, et al. High thermoelectric performance BiSbTe alloy with unique low-dimensional structure. J. Appl. Phys., 2009, 105: 113713-113718.
[14]	NI HUA-LIANG, ZHU TIE-JUN, ZHAO XIN-BING. Thermoelectric properties of hydrothermal synthesized Bi-Te-Se alloys. Journal of Functional Materials, 2006, 10(37): 1561-1563.
[15]	LV QIANG, CHENG YING, WANG JING-JU, et al. Preparation of Bi2Te3-based p-type pseudoternary thermoelectric materials by the hot-press method and their properties. Journal of the Chinese Ceramic Society, 2008, 36(5): 683-688.
[16]	LI D, QIN X Y, DOU Y C, et al. Thermoelectric properties of hydrothermally synthesized Bi2Te3-xSex nanocrystals. Scripta Materialia, 2012, 67: 161-164.
[17]	JIANG J, CHEN L D, BAI S Q, et al. Fabrication and thermoelectric performance of textured n-type Bi2(Te, Se)3 by spark plasma sintering. Material Science Engineering B, 2005, 117(3): 334-338.

Effects of Different Amount of Se-doping on Microstructures and Thermoelectric Properties of n-type Bi₂Te_3-_xSe_x

RichHTML

PDF (PC)

Knowledge

Cited

Abstract

Cite this article

share this article

Figures/Tables 8

References 17

Related Articles 15

Recommended Articles

Metrics

Comments

[1]	LI Junsheng, ZENG Liang, LIU Rongjun, WANG Yanfei, WAN Fan, LI Duan. Functional Strontium Tantalum Oxynitride Ceramics: Efficient Synthesis, Densification and Dielectric Performance [J]. Journal of Inorganic Materials, 2023, 38(8): 885-892.
[2]	WANG Xu, GU Ming, LIAO Jincheng, SONG Qingfeng, SHI Xun, BAI Shengqiang, CHEN Lidong. High Temperature Interfacial Stability of Fe/Bi_0.5Sb_1.5Te₃Thermoelectric Elements [J]. Journal of Inorganic Materials, 2021, 36(2): 197-202.
[3]	WANG Tingting, SHI Shumei, LIU Chenyuan, ZHU Wancheng, ZHANG Heng. Synthesis of Hierarchical Porous Nickel Phyllosilicate Microspheres as Efficient Adsorbents for Removal of Basic Fuchsin [J]. Journal of Inorganic Materials, 2021, 36(12): 1330-1336.
[4]	SONG Keke, HUANG Hao, LU Mengjie, YANG Anchun, WENG Jie, DUAN Ke. Hydrothermal Preparation and Characterization of Zn, Si, Mg, Fe Doped Hydroxyapatite [J]. Journal of Inorganic Materials, 2021, 36(10): 1091-1096.
[5]	WAN Peng, LI Mian, HUANG Qing. Molten Salt Assisted Synthesis of Dy₃Si₂C₂ Coated SiC Powders and Sintering Behavior of SiC Ceramics [J]. Journal of Inorganic Materials, 2021, 36(1): 49-54.
[6]	ZHAO Zhankui, LI Tao, LU Shuhan, WANG Minggang, ZHANG Jingjing, CHENG Daowen, WU Chen, CHI Yue, WANG Hongli. Magnetic Properties and Resistivity of Soft Magnetic Composites Regulated by SPS Enhanced Interface Reaction Mechanism [J]. Journal of Inorganic Materials, 2020, 35(11): 1223-1226.
[7]	HUANG Zhi-Cheng, YAO Yao, PEI Jun, DONG Jin-Feng, ZHANG Bo-Ping, LI Jing-Feng, SHANG Peng-Peng. Preparation and Thermoelectric Property of n-type SnS [J]. Journal of Inorganic Materials, 2019, 34(3): 321-327.
[8]	WANG Wei, LUO Shi-Jie, XIAN Cong, XIAO Qun, YANG Yang, OU Yun, LIU Yun-Ya, XIE Shu-Hong. Enhanced Thermoelectric Properties of Hydrothermal Synthesized BiCl₃/Bi₂S₃ Composites [J]. Journal of Inorganic Materials, 2019, 34(3): 328-334.
[9]	LIU Hong-Xia, LI Wen, ZHANG Xin-Yue, LI Juan, PEI Yan-Zhong. Thermoelectric Properties of (Ag₂Se)_1-_x(Bi₂Se₃)_x [J]. Journal of Inorganic Materials, 2019, 34(3): 341-348.
[10]	WANG Shu-Jiang, YANG Yong-Heng, WEN Chun-Yang, ZHANG Guo-Kui, YUAN Chun-Hui. Preparation and Property of Nano-Ag/illite Composite Material [J]. Journal of Inorganic Materials, 2018, 33(5): 570-576.
[11]	JIA Si-Qi, JIANG Zheng, CHI Li-Na, YE Ying, HU Shuang-Shuang. Synthesis and Photoelectrocatalytic Performance of Sb₂S₃ Nanorods from Natural Stibnite [J]. Journal of Inorganic Materials, 2018, 33(11): 1213-1218.
[12]	WANG Ming-Hui, ZHONG Hong-Bin, FAN Yu-Chi, CHEN Ting. Spark Plasma Sintering of Bioactive Ca₂MgSi₂O₇ Ceramics [J]. Journal of Inorganic Materials, 2017, 32(8): 825-830.
[13]	YANG Kun-Kun, YANG Shao-Hua, ZHAO Ping, ZHAO Yan-Long. Hydrothermal Synthesis of FeS₂/Reduced Graphene Oxide Nanocomposite with Enhanced Discharge Performance for Thermal Battery [J]. Journal of Inorganic Materials, 2017, 32(7): 691-698.
[14]	GUO Yu, LI Dong-Xin, WU Hong-Mei, JIN Yu-Jia, ZHOU Li-Dai, CHEN Qiang-Qiang. Preparation, Characterization and Catalytic Performance of Supported Titanium Silicalite-1 Zeolite Membrane Catalyst [J]. Journal of Inorganic Materials, 2017, 32(6): 631-636.
[15]	ABUBAKER Abutartour, LOTFIA El-Majdoub, SHI Ya-Sai, LI Ni-Li, XU Qing-Hong. A New Porous Zirconium Phosphonate Hybride Material and Its Adsorption Properties [J]. Journal of Inorganic Materials, 2017, 32(3): 305-312.