Unusual n-type thermoelectric properties of Bi2Te3 doped with divalent alkali earth metals

被引：34

作者：

Byun, Sejin ^{[1
,2
,3
]}

Cha, Joonil ^{[1
,2
,3
]}

Zhou, Chongjian ^{[2
,3
]}

Lee, Yong Kyu ^{[1
,2
,3
]}

Lee, Hyungseok ^{[1
,2
,3
]}

Park, Sang Hyun ^{[5
]}

Lee, Won Bo ^{[2
,3
]}

Chung, In ^{[1
,2
,3
,4
]}

机构：

[1] Inst for Basic Sci Korea, Ctr Nanoparticle Res, Seoul 08826, South Korea

[2] Sch Chem & Biol Engn, Seoul 08826, South Korea

[3] Seoul Natl Univ, Seoul 08826, South Korea

[4] Seoul Natl Univ, Inst Engn Res, Seoul 08826, South Korea

[5] Korea Inst Energy Res, Adv Mat & Devices Lab, Daejeon 34129, South Korea

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2019年 / 269卷

基金：

新加坡国家研究基金会;

关键词：

Thermoelectric; Bismuth telluride; Alkaline earth metal doping; n-type conduction; Waste heat; THERMAL TRANSPORT; FIGURE; RESISTIVITY; MERIT;

D O I：

10.1016/j.jssc.2018.10.012

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Bi2Te3-based materials are a representative thermoelectric system operating near ambient temperature. Their n-type family is very limited and underperforms the p-type counterpart, which is a major concern in the thermoelectric community. Here we report that alkali earth metals (AE = Mg, Ca, Sr, Ba) in Group 2 unusually induce n-type thermoelectric properties in Bi2Te3. Mg is the most efficient electron donor among them. The x = 0.01 sample of MgxBi2-xTe3 (x = 0.005, 0.01, 0.015) system exhibits remarkably enhanced power factor and ZT of similar to 0.8 at 350 K in comparison with pristine Bi2Te3. The improved performance is attributed to simultaneously enhanced electrical conductivity and reduced lattice thermal conductivity. Remarkably, MgxBi2-xTe3 materials show larger Seebeck coefficients than those expected by the theoretical Pisarenko relation.

引用

页码：396 / 400

页数：5

共 32 条

[1] ZnTe Alloying Effect on Enhanced Thermoelectric Properties of p-Type PbTe [J].

Ahn, Kyunghan ;

Shin, Hocheol ;

Im, Jino ;

Park, Sang Hyun ;

Chung, In .

ACS APPLIED MATERIALS & INTERFACES, 2017, 9 (04) :3766-3773

[2] High Power Factor and Enhanced Thermoelectric Performance of SnTe-AgInTe2: Synergistic Effect of Resonance Level and Valence Band Convergence [J].

Banik, Ananya ;

Shenoy, U. Sandhya ;

Saha, Sujoy ;

Waghmare, Umesh V. ;

Biswas, Kanishka .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2016, 138 (39) :13068-13075

[3] High-performance bulk thermoelectrics with all-scale hierarchical architectures [J].

Biswas, Kanishka ;

He, Jiaqing ;

Blum, Ivan D. ;

Wu, Chun-I ;

Hogan, Timothy P. ;

Seidman, David N. ;

Dravid, Vinayak P. ;

Kanatzidis, Mercouri G. .

NATURE, 2012, 489 (7416) :414-418

[4] Strained endotaxial nanostructures with high thermoelectric figure of merit [J].

Biswas, Kanishka ;

He, Jiaqing ;

Zhang, Qichun ;

Wang, Guoyu ;

Uher, Ctirad ;

Dravid, Vinayak P. ;

Kanatzidis, Mercouri G. .

NATURE CHEMISTRY, 2011, 3 (02) :160-166

[5] Study on thermal conductivity and electrical resistivity of Al-Cu alloys obtained by Boltzmann transport equation and first-principles simulation: Semi-empirical approach [J].

Choi, Garam ;

Kim, Hyo Seok ;

Lee, Kyungmoon ;

Park, Sang Hyun ;

Cha, JinHyeok ;

Chung, In ;

Lee, Won Bo .

JOURNAL OF ALLOYS AND COMPOUNDS, 2017, 727 :1237-1242

[6] Enhancement of reproducibility and reliability in a high-performance flexible thermoelectric generator using screen-printed materials [J].

Choi, Hyeongdo ;

Kim, Yong Jun ;

Kim, Choong Sun ;

Yang, Hyeong Man ;

Oh, Min-Wook ;

Cho, Byung Jin .

NANO ENERGY, 2018, 46 :39-44

[7] Thermal conductivity in Bi0.5Sb1.5Te3+x and the role of dense dislocation arrays at grain boundaries [J].

Deng, Rigui ;

Su, Xianli ;

Zheng, Zheng ;

Liu, Wei ;

Yan, Yonggao ;

Zhang, Qingjie ;

Dravid, Vinayak P. ;

Uher, Ctirad ;

Kanatzidis, Mercouri G. ;

Tang, Xinfeng .

SCIENCE ADVANCES, 2018, 4 (06)

[8] Breaking the Tetra-Coordinated Framework Rule: New Clathrate Ba8M24P28+δ (M=Cu/Zn) [J].

Dolyniuk, Juli-Anna ;

Zaikina, Julia V. ;

Kaseman, Derrick C. ;

Sen, Sabyasachi ;

Kovnir, Kirill .

ANGEWANDTE CHEMIE-INTERNATIONAL EDITION, 2017, 56 (09) :2418-2422

[9] Investigation of the bipolar effect in the thermoelectric material CaMg2Bi2 using a first-principles study [J].

Gong, J. J. ;

Hong, A. J. ;

Shuai, J. ;

Li, L. ;

Yan, Z. B. ;

Ren, Z. F. ;

Liu, J. -M. .

PHYSICAL CHEMISTRY CHEMICAL PHYSICS, 2016, 18 (24) :16566-16574

[10]

Heremans J. P., 2016, Materials Aspect of Thermoelectricity, P53

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