Enhanced thermoelectric performance of La-doped BiCuSeO by tuning band structure

被引：99

作者：

Liu, Yaochun ^{[1
,2
]}

Ding, Jingxuan ^{[1
]}

Xu, Ben ^{[1
]}

Lan, Jinle ^{[3
,4
]}

Zheng, Yuanhua ^{[1
]}

Zhan, Bin ^{[1
]}

Zhang, Boping ^{[2
]}

Lin, Yuanhua ^{[1
]}

Nan, Cewen ^{[1
]}

机构：

[1] Tsinghua Univ, Sch Mat Sci & Engn, State Key Lab New Ceram & Fine Proc, Beijing 100084, Peoples R China

[2] Univ Sci & Technol, Sch Mat Sci & Engn, Beijing 100083, Peoples R China

[3] Beijing Univ Chem Technol, State Key Lab Organ Inorgan Composites, Beijing 100029, Peoples R China

[4] Beijing Univ Chem Technol, Changzhou Inst Adv Mat, Changzhou 213164, Jiangsu, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2015年 / 106卷 / 23期

关键词：

ELECTRONIC-STRUCTURES; CONDUCTIVITY; OXYSELENIDES; SYSTEM; TE; SE; CH;

D O I：

10.1063/1.4922492

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Bi1-xLaxCuSeO ceramic bulks have been prepared by the spark plasma sintering method. Our results indicate that La-doping can lead to an obvious change of the band structure evidenced by the absorption spectra and electric transportation behaviors (e.g., m* and Seebeck coefficient). The variation of band structure results in a great enhancement of carrier mobility caused by a decreased energy offset between the primary and secondary valence bands. A maximum ZT value of 0.74 can be obtained in 8% La-doped BiCuSeO sample at 923 K, which is 37% higher than that of the pure BiCuSeO bulk. Our results reveal that band engineering is an effective way to enhance the thermoelectric properties of BiCuSeO system. (C) 2015 AIP Publishing LLC.

引用

页数：5

共 35 条

[1] Structural and Electronic Transport Properties in Sr-Doped BiCuSeO [J].

Barreteau, Celine ;

Berardan, David ;

Amzallag, Emilie ;

Zhao, LiDong ;

Dragoe, Nita .

CHEMISTRY OF MATERIALS, 2012, 24 (16) :3168-3178

[2]

Fistul V. I., 1969, Heavily Doped Semiconductors., P77

[3] Crystal structures, optoelectronic properties, and electronic structures of layered oxychalcogenides MCuOCh (M = Bi, La; Ch = S, Se, Te):: Effects of electronic configurations of M3+ ions [J].

Hiramatsu, Hidenori ;

Yanagi, Hiroshi ;

Kamiya, Toshio ;

Ueda, Kazushige ;

Hirano, Masahiro ;

Hosono, Hideo .

CHEMISTRY OF MATERIALS, 2008, 20 (01) :326-334

[4] Valence-band structure of highly efficient p-type thermoelectric PbTe-PbS alloys [J].

Jaworski, Christopher M. ;

Nielsen, Michele D. ;

Wang, Hsin ;

Girard, Steven N. ;

Cai, Wei ;

Porter, Wally D. ;

Kanatzidis, Mercouri G. ;

Heremans, Joseph P. .

PHYSICAL REVIEW B, 2013, 87 (04)

[5] Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set [J].

Kresse, G ;

Furthmuller, J .

COMPUTATIONAL MATERIALS SCIENCE, 1996, 6 (01) :15-50

[6] Enhanced Thermoelectric Properties of Pb-doped BiCuSeO Ceramics [J].

Lan, Jin-Le ;

Liu, Yao-Chun ;

Zhan, Bin ;

Lin, Yuan-Hua ;

Zhang, Boping ;

Yuan, Xun ;

Zhang, Wenqing ;

Xu, Wei ;

Nan, C. -W. .

ADVANCED MATERIALS, 2013, 25 (36) :5086-5090

[7] Doping for higher thermoelectric properties in p-type BiCuSeO oxyselenide [J].

Lan, Jin-Le ;

Zhan, Bin ;

Liu, Yao-Chun ;

Zheng, Bin ;

Liu, Yong ;

Lin, Yuan-Hua ;

Nan, Ce-Wen .

APPLIED PHYSICS LETTERS, 2013, 102 (12)

[8] Density of state effective mass and related charge transport properties in K-doped BiCuOSe [J].

Lee, Dong Sun ;

An, Tae-Ho ;

Jeong, Mahn ;

Choi, Hyoung-Seuk ;

Lim, Young Soo ;

Seo, Won-Seon ;

Park, Cheol-Hee ;

Park, Chan ;

Park, Hyung-Ho .

APPLIED PHYSICS LETTERS, 2013, 103 (23)

[9] Enhanced thermoelectric performance of Ca-doped BiCuSeO in a wide temperature range [J].

Li, Fu ;

Wei, Tian-Ran ;

Kang, Feiyu ;

Li, Jing-Feng .

JOURNAL OF MATERIALS CHEMISTRY A, 2013, 1 (38) :11942-11949

[10] The roles of Na doping in BiCuSeO oxyselenides as a thermoelectric material [J].

Li, Jing ;

Sui, Jiehe ;

Pei, Yanling ;

Meng, Xianfu ;

Berardan, David ;

Dragoe, Nita ;

Cai, Wei ;

Zhao, Li-Dong .

JOURNAL OF MATERIALS CHEMISTRY A, 2014, 2 (14) :4903-4906

← 1 2 3 4 →