DataVXACS Applied Materials & InterfacesPaper
journal article·2024-01-24

Intensified Phonon Scattering in ZrCoBi Half-Heusler by Noble Metals Doping

Xin Bao, Kejia Liu, Xiaojing Ma, Xiaofang Li, Honghao Yao, Sheng Ye, Feng Cao, Jun Mao, Qian Zhang

ACS Applied Materials & Interfaces· Volume 16· Issue 3
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Source abstract

Abstract

ZrCoBi-based half-Heuslers have great potential in power generation applications because of their high thermoelectric performance in both p- and n-type constituents. In this work, n-type ZrCoBi with improved thermoelectric performance has been realized by intensifying the phonon scattering via noble metal doping, e.g., Pd and Pt doping. The carrier concentration was effectively tuned to the optimal range, and the lattice thermal conductivity was greatly suppressed via the strong strain field and mass fluctuation scattering brought about by the large difference in atomic size and mass between Pd or Pt and Co. Consequently, the state-of-art figure of merit zT ∼1 was achieved in Pd- or Pt-doped ZrCoBi. In addition, the average zT avg values for ZrCo 0.95 Pd 0.05 Bi and ZrCo 0.925 Pt 0.075 Bi have reached 0.58 and 0.51, respectively, which are higher than those of most of the reported n-type ZrCoBi-based and ZrCoSb-based half-Heusler alloys.
Source: openalex_inverted_index · Quality: baseline

Research context

Metals & alloys

OpenAlex topics: Advanced Thermoelectric Materials and Devices · Heusler alloys: electronic and magnetic properties · 2D Materials and Applications

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

Affiliations

School of Materials Science and Engineering, and Institute of Materials Genome & Big Data, Harbin Institute of Technology, Shenzhen 518055, China

School of Science, Harbin Institute of Technology, Shenzhen 518055, China

State Key Laboratory of Advanced Welding and Joining, Harbin Institute of Technology, Harbin 150001, China

Funding

National Key Research and Development Program of China · Basic and Applied Basic Research Foundation of Guangdong Province · Science, Technology and Innovation Commission of Shenzhen Municipality · Fundamental Research Funds for the Central Universities · National Natural Science Foundation of China · Shenzhen Stable Support Plan for Higher Education Institutions

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