Ce‐filled Ni1.5Co2.5Sb12 Skutterudite Thin Films with Record‐High Figure of Merit And Device Performance

Author:

Li Dou1,Shi Xiao‐Lei2,Zhu Jiaxi1,Li Meng2,Wang Jianyuan3,Liu Wei‐Di24,Zhao Qinghua156,Zhong Hong1,Li Shuangming1,Chen Zhi‐Gang2ORCID

Affiliation:

1. State Key Laboratory of Solidification Processing Northwestern Polytechnical University Xi'an 710072 P. R. China

2. School of Chemistry and Physics and Centre for Materials Science Queensland University of Technology Brisbane Queensland 4001 Australia

3. MOE Key Laboratory of Material Physics and Chemistry Under Extraordinary Conditions School of Physical Science and Technology Northwestern Polytechnical University Xi'an 710072 P. R. China

4. Australian Institute for Bioengineering and Nanotechnology The University of Queensland Brisbane Queensland 4072 Australia

5. Key Laboratory of Radiation Detection Materials and Devices Ministry of Industry and Information Technology Xi'an 710072 P. R. China

6. Research & Development Institute of Northwestern Polytechnical University in Shenzhen Shenzhen 518057 P. R. China

Abstract

AbstractRealizing high thermoelectric performance in CoSb3 skutterudite‐based thin films and their devices is historically challenging, especially due to the lack of high‐performing thin‐film‐based device working at medium‐to‐high temperatures. Here, a record‐high ZT of 1.1 is achieved at 683 K in an n‐type Ce0.3Ni1.5Co2.5Sb12 thin film, fabricated from a self‐designed target via advanced pulsed laser deposition. Both experimental and computational results confirm that the Ce‐filling and metal‐featured nanoinclusions such as CeSb contribute to high electrical conductivity, while the Ni‐doping and significantly strengthen the energy filtering effect that occurs at the dense interfaces between the Ce0.3Ni1.5Co2.5Sb12 matrix and the nanoinclusions which leads to a large Seebeck coefficient, giving rise to such a high ZT. In addition, a new‐type CoSb3 thin‐film‐based device is successfully fabricated, which exhibits a high output power density of 8.25 mW cm−2 at a temperature difference of 140 K and a cold‐side temperature of 573 K, indicating the potential for application to medium‐to‐high‐temperature power generation scenarios.

Funder

National Natural Science Foundation of China

Australian Research Council

Publisher

Wiley

Subject

General Materials Science,Renewable Energy, Sustainability and the Environment

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