Enhanced Electrical Properties of Bi2-xSbxTe3 Nanoflake Thin Films Through Interface Engineering

被引：5

作者：

Wu, Xudong ^{[1
,2
]}

Ding, Junjie ^{[1
,2
]}

Cui, Wenjun ^{[1
,2
]}

Lin, Weixiao ^{[1
,2
]}

Xue, Zefan ^{[1
,2
]}

Yang, Zhi ^{[1
,2
]}

Liu, Jiahui ^{[1
]}

Nie, Xiaolei ^{[2
]}

Zhu, Wanting ^{[2
]}

Van Tendeloo, Gustaaf ^{[2
,3
]}

Sang, Xiahan ^{[1
,2
]}

机构：

[1] Wuhan Univ Technol, State Key Lab Adv Technol Mat Synth & Proc, Wuhan 430070, Peoples R China

[2] Wuhan Univ Technol, NRC Nanostruct Res Ctr, Wuhan 430070, Peoples R China

[3] Univ Antwerp, EMAT Electron Microscopy Mat Sci, Groenenborgerlaan 171, B-2023 Antwerp, Belgium

来源：

ENERGY & ENVIRONMENTAL MATERIALS | 2024年 / 7卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Bi2Te3; nanoflakes; interface engineering; scanning transmission electron microscopy; thermoelectric thin film; HIGH-THERMOELECTRIC PERFORMANCE; POWER-GENERATION; 2D MATERIALS; GROWTH; BISMUTH; TELLURIDE; NANOPLATELETS; MECHANISMS; NANOSHEETS; MAGNETISM;

D O I：

10.1002/eem2.12755

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The structure-property relationship at interfaces is difficult to probe for thermoelectric materials with a complex interfacial microstructure. Designing thermoelectric materials with a simple, structurally-uniform interface provides a facile way to understand how these interfaces influence the transport properties. Here, we synthesized Bi2-xSbxTe3 (x = 0, 0.1, 0.2, 0.4) nanoflakes using a hydrothermal method, and prepared Bi2-xSbxTe3 thin films with predominantly (0001) interfaces by stacking the nanoflakes through spin coating. The influence of the annealing temperature and Sb content on the (0001) interface structure was systematically investigated at atomic scale using aberration-corrected scanning transmission electron microscopy. Annealing and Sb doping facilitate atom diffusion and migration between adjacent nanoflakes along the (0001) interface. As such it enhances interfacial connectivity and improves the electrical transport properties. Interfac reactions create new interfaces that increase the scattering and the Seebeck coefficient. Due to the simultaneous optimization of electrical conductivity and Seebeck coefficient, the maximum power factor of the Bi1.8Sb0.2Te3 nanoflake films reaches 1.72 mW m(-1) K-2, which is 43% higher than that of a pure Bi2Te3 thin film.

引用

页数：8

共 56 条

[31] Insight into Nucleation and Growth of Bi2-xSbxTe3 (x=0-2) Nanoplatelets in Hydrothermal Synthesis [J].

Mi, Jian-Li ;

Norby, Peter ;

Bremholm, Martin ;

Iversen, Bo B. .

CHEMISTRY OF MATERIALS, 2017, 29 (12) :5070-5079

[32] Enhanced electrical properties of stoichiometric Bi0.5Sb1.5Te3 film with high-crystallinity via layer-by-layer in-situ Growth [J].

Mu, Xin ;

Zhou, Hongyu ;

He, Danqi ;

Zhao, Wenyu ;

Wei, Ping ;

Zhu, Wanting ;

Nie, Xiaolei ;

Liu, Huijun ;

Zhang, Qingjie .

NANO ENERGY, 2017, 33 :55-64

[33] Electric field effect in atomically thin carbon films [J].

Novoselov, KS ;

Geim, AK ;

Morozov, SV ;

Jiang, D ;

Zhang, Y ;

Dubonos, SV ;

Grigorieva, IV ;

Firsov, AA .

SCIENCE, 2004, 306 (5696) :666-669

[34] Ultrahigh thermoelectric performance in Cu2Se-based hybrid materials with highly dispersed molecular CNTs [J].

Nunna, Raghavendra ;

Qiu, Pengfei ;

Yin, Meijie ;

Chen, Hongyi ;

Hanus, Riley ;

Song, Qingfeng ;

Zhang, Tiansong ;

Chou, Mei-Yin ;

Agne, Matthias T. ;

He, Jiaqing ;

Snyder, G. Jeffrey ;

Shi, Xun ;

Chen, Lidong .

ENERGY & ENVIRONMENTAL SCIENCE, 2017, 10 (09) :1928-1935

[35] Large area strain analysis using scanning transmission electron microscopy across multiple images [J].

Oni, A. A. ;

Sang, X. ;

Raju, S. V. ;

Dumpala, S. ;

Broderick, S. ;

Kumar, A. ;

Sinnott, S. ;

Saxena, S. ;

Rajan, K. ;

LeBeau, J. M. .

APPLIED PHYSICS LETTERS, 2015, 106 (01)

[36] Extraordinary Off-Stoichiometric Bismuth Telluride for Enhanced n-Type Thermoelectric Power Factor [J].

Park, Kunsu ;

Ahn, Kyunghan ;

Cha, Joonil ;

Lee, Sanghwa ;

Chae, Sue In ;

Cho, Sung-Pyo ;

Ryee, Siheon ;

Im, Jino ;

Lee, Jaeki ;

Park, Su-Dong ;

Han, Myung Joon ;

Chung, In ;

Hyeon, Taeghwan .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2016, 138 (43) :14458-14468

[37] High-thermoelectric performance of nanostructured bismuth antimony telluride bulk alloys [J].

Poudel, Bed ;

Hao, Qing ;

Ma, Yi ;

Lan, Yucheng ;

Minnich, Austin ;

Yu, Bo ;

Yan, Xiao ;

Wang, Dezhi ;

Muto, Andrew ;

Vashaee, Daryoosh ;

Chen, Xiaoyuan ;

Liu, Junming ;

Dresselhaus, Mildred S. ;

Chen, Gang ;

Ren, Zhifeng .

SCIENCE, 2008, 320 (5876) :634-638

[38] Power generation and thermoelectric cooling enabled by momentum and energy multiband alignments [J].

Qin, Bingchao ;

Wang, Dongyang ;

Liu, Xixi ;

Qin, Yongxin ;

Dong, Jin-Feng ;

Luo, Jiangfan ;

Li, Jing-Wei ;

Liu, Wei ;

Tan, Gangjian ;

Tang, Xinfeng ;

Li, Jing-Feng ;

He, Jiaqing ;

Zhao, Li-Dong .

SCIENCE, 2021, 373 (6554) :556-+

[39] In situ atomistic insight into the growth mechanisms of single layer 2D transition metal carbides [J].

Sang, Xiahan ;

Xie, Yu ;

Yilmaz, Dundar E. ;

Lotfi, Roghayyeh ;

Alhabeb, Mohamed ;

Ostadhossein, Alireza ;

Anasori, Babak ;

Sun, Weiwei ;

Li, Xufan ;

Xiao, Kai ;

Kent, Paul R. C. ;

van Duin, Adri C. T. ;

Gogotsi, Yury ;

Unocic, Raymond R. .

NATURE COMMUNICATIONS, 2018, 9

[40] In situ edge engineering in two-dimensional transition metal dichalcogenides [J].

Sang, Xiahan ;

Li, Xufan ;

Zhao, Wen ;

Dong, Jichen ;

Rouleau, Christopher M. ;

Geohegan, David B. ;

Ding, Feng ;

Xiao, Kai ;

Unocic, Raymond R. .

NATURE COMMUNICATIONS, 2018, 9

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