Thermoelectric transport properties of diamond-like Cu1-xFe1+xS2 tetrahedral compounds

被引：103

作者：

Li, Yulong ^{[1
,2
,3
]}

Zhang, Tiansong ^{[1
,2
]}

Qin, Yuting ^{[1
,2
,3
]}

Day, Tristan ^{[4
]}

Snyder, G. Jeffrey ^{[4
]}

Shi, Xun ^{[1
,2
]}

Chen, Lidong ^{[1
,2
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Ceram, State Key Lab High Performance Ceram & Superfine, Shanghai 200050, Peoples R China

[2] Chinese Acad Sci, Shanghai Inst Ceram, CAS Key Lab Mat Energy Convers, Shanghai 200050, Peoples R China

[3] Univ Chinese Acad Sci, Beijing 100049, Peoples R China

[4] CALTECH, Dept Mat Sci, Pasadena, CA 91125 USA

来源：

JOURNAL OF APPLIED PHYSICS | 2014年 / 116卷 / 20期

基金：

中国国家自然科学基金;

关键词：

LATTICE THERMAL CONDUCTIVITY; EARTH-ABUNDANT; BAND-GAP; CHALCOPYRITE; PERFORMANCE; SEMICONDUCTORS; IMPERFECTIONS; TEMPERATURES; SCATTERING; ALLOYS;

D O I：

10.1063/1.4902849

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Polycrystalline samples with the composition of Cu1-xFe1+xS2 (x = 0, 0.01, 0.03, 0.05, 0.1) were synthesized by a melting-annealing-sintering process. X-ray powder diffraction reveals all the samples are phase pure. The backscattered electron image and X-ray map indicate that all elements are distributed homogeneously in the matrix. The measurements of Hall coefficient, electrical conductivity, and Seebeck coefficient show that Fe is an effective n-type dopant in CuFeS2. The electron carrier concentration of Cu1-xFe1+xS2 is tuned within a wide range leading to optimized power factors. The lattice phonons are also strongly scattered by the substitution of Fe for Cu, leading to reduced thermal conductivity. We use Debye approximation to model the low temperature lattice thermal conductivity. It is found that the large strain field fluctuation introduced by the disordered Fe ions generates extra strong phonon scatterings for lowered lattice thermal conductivity. (C) 2014 AIP Publishing LLC.

引用

页数：8

共 38 条

[1] LATTICE THERMAL CONDUCTIVITY OF DISORDERED SEMICONDUCTOR ALLOYS AT HIGH TEMPERATURES [J].

ABELES, B .

PHYSICAL REVIEW, 1963, 131 (05) :1906-&

[2]

Askerov B., 1994, ELECT TRANSPORT PHEN

[3] SEMICONDUCTORS WITH CHALCOPYRITE STRUCTURE [J].

AUSTIN, IG ;

GOODMAN, CHL ;

PENGELLY, AE .

NATURE, 1956, 178 (4530) :433-433

[4] DEFORMATION POTENTIALS AND MOBILITIES IN NON-POLAR CRYSTALS [J].

BARDEEN, J ;

SHOCKLEY, W .

PHYSICAL REVIEW, 1950, 80 (01) :72-80

[5] Cooling, heating, generating power, and recovering waste heat with thermoelectric systems [J].

Bell, Lon E. .

SCIENCE, 2008, 321 (5895) :1457-1461

[6] 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

[7] EFFECT OF POINT IMPERFECTIONS ON LATTICE THERMAL CONDUCTIVITY [J].

CALLAWAY, J ;

VONBAEYER, HC .

PHYSICAL REVIEW, 1960, 120 (04) :1149-1154

[8] MODEL FOR LATTICE THERMAL CONDUCTIVITY AT LOW TEMPERATURES [J].

CALLAWAY, J .

PHYSICAL REVIEW, 1959, 113 (04) :1046-1051

[9] Enhanced thermoelectric performance in Cd doped CuInTe2 compounds [J].

Cheng, N. ;

Liu, R. ;

Bai, S. ;

Shi, X. ;

Chen, L. .

JOURNAL OF APPLIED PHYSICS, 2014, 115 (16)

[10] THEORY OF IMPURITY SCATTERING IN SEMICONDUCTORS [J].

CONWELL, E ;

WEISSKOPF, VF .

PHYSICAL REVIEW, 1950, 77 (03) :388-390

← 1 2 3 4 →