Exceptional Thermoelectric Performance Enabled by High Carrier Mobility and Intrinsically Low Lattice Thermal Conductivity in Phosphide Cd3P2
Source abstract
Abstract
A novel thermoelectric Cd3P2 is obtained via regulating carrier concentrations. Ultrahigh carrier mobilities over 1500 cm2 V–1 s–1 are observed at room temperature, which is attributed to small band effective mass and confirmed by the electronic structure calculation. Meanwhile, the intrinsically low lattice thermal conductivity below 1.0 W m–1 K–1 in the investigated temperature range is found due to the complex crystal structure and low sound velocity. Combined with high mobility and low thermal conductivity, a peak zT of 0.91 at 673 K and an excellent average zT of 0.57 over 300–673 K are obtained in Cd3P2-based compounds, which are record-high values among phosphides. This study highlights the potential of exploring high-performance novel thermoelectric materials in compounds with high carrier mobility.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · 2D Materials and Applications · Chalcogenide Semiconductor Thin Films
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
College of Physics, Chongqing University, Chongqing 401331, P. R. China
College of Materials, Chongqing University, Chongqing 401331, P. R. China
Analytical and Testing Center, Chongqing University, Chongqing 401331, P. R. China
Chongqing Institute of Green and Intelligent Technology, Chinese Academy of Sciences, Chongqing 400714, P. R. China
Funding
National Natural Science Foundation of China · Chinese Academy of Sciences · Project for Fundamental and Frontier Research in Chongqing
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