DataVXACS Applied Energy MaterialsPaper
journal article·2024-06-10

Crystal Structure and Thermoelectric Properties of Pavonite Homologous Pb4Sb12–xBi8+xSe34

Ruizhi Yang, Xia Li, Hongwei Ming, Weiping Guo, Zixuan Chen, Hong-Hua Cui, Zhong-Zhen Luo, Zhigang Zou

ACS Applied Energy Materials· Volume 7· Issue 11
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Source abstract

Abstract

The Pb 4 Sb 12– x Bi 8+ x Se 34 ( x = 0, 1, 2, 3, 4, and 5) crystals belong to pavonite homologues composed of thick NaCl- and thin GeS-type slabs which crystallize in the C 2/ m space group. Pb 4 Sb 12– x Bi 8+ x Se 34 compounds exhibit n-type semiconductor transport behavior and demonstrate excellent thermodynamic stability. These intrinsic compounds have high carrier concentrations of ∼2.18 × 10 19 to 4.47 × 10 20 cm –3, leading to high electrical conductivities. The two-band electronic structure results in a high Seebeck coefficient. Taking Pb 4 Sb 9 Bi 11 Se 34 as an example, it has a remarkable Seebeck coefficient of −149.1 μV K –1 and high electrical conductivity of ∼118 S cm –1 . It is comparable with other pavonite at 723 K. On the other hand, due to mixed occupancies of cation sites and complex crystal structure, the Pb 4 Sb 9 Bi 11 Se 34 features ultralow lattice thermal conductivity of ∼0.25 W m –1 K –1 at 723 K. The high figure of merit, ZT, of 0.48 for Pb 4 Sb 9 Bi 11 Se 34 is obtained at 723 K.
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Research context

Electronic materials

OpenAlex topics: Advanced Thermoelectric Materials and Devices · Advanced Semiconductor Detectors and Materials · Chalcogenide Semiconductor Thin Films

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Key Laboratory of Advanced Materials Technologies, International (HongKong Macao and Taiwan) Joint Laboratory on Advanced Materials Technologies, College of Materials Science and Engineering, Fuzhou University, Fuzhou 350108, P. R. China

Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China, Fuzhou, Fujian 350108, China

Mechanical and Electrical Engineering Practice Center, Fuzhou University, Fuzhou 350108, China

Eco-materials and Renewable Energy Research Center, College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China

National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China

Funding

National Key Research and Development Program of China · Natural Science Foundation of Fujian Province · Fujian Science and Technology Innovation Laboratory for Optoelectronic Information of China · National Natural Science Foundation of China · Minjiang Scholar Professorship

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