Optimized Thermoelectric Performance and Plasticity of Ductile Semiconductor Ag2S0.5Se0.5 Via Dual‐Phase Engineering
Source abstract
Abstract
Abstract Inorganic semiconductor Ag2S with excellent plasticity is highly desired in flexible and wearable thermoelectrics. However, the compromise between plasticity and thermoelectric performance limits the advances in Ag2S‐based thermoelectric materials and their devices. Here, a 0.5 mol.% Ag2Te‐alloyed Ag2S0.5Se0.5 bulk material is designed, which has a competitively high near‐room‐temperature figure of merit of ≈0.43 at 323 K and an ultra‐high bending strain of ≈32.5% without cracks. Introducing Ag2Te can optimize the carrier concentration and mobility of the Ag2S0.5Se0.5 matrix due to its metal‐like conducting features, leading to a maximum power factor of ≈6 µW cm−1 K−2. Simultaneously, Ag2Te induces Ag‐poor amorphous phase boundaries, serving as buffer layers to enhance the overall plasticity. Moreover, such amorphous phase boundaries combined with multiscale phonon scattering sources can significantly suppress the lattice thermal conductivity to ≈0.28 W m−1 K−1 at 323 K, leading to a high figure of merit. This study demonstrates an innovative route to simultaneously boost the thermoelectric performance and plasticity of ductile semiconductors.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Advanced Thermoelectric Materials and Devices · Chalcogenide Semiconductor Thin Films · Quantum Dots Synthesis And Properties
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
State Key Laboratory of Materials‐Oriented Chemical Engineering College of Chemical Engineering Nanjing Tech University Nanjing 211816 China
School of Chemistry and Physics and Centre for Materials Science Queensland University of Technology Brisbane Queensland 4001 Australia
School of Mechanical and Ming Engineering The University of Queensland Brisbane Queensland 4072 Australia
Department of Physics and Guangdong Provincial Key Laboratory of Computational Science and Material Design Southern University of Science and Technology Shenzhen 518055 China
Australian Institute for Bioengineering and Nanotechnology The University of Queensland Brisbane Queensland 4072 Australia
College of Materials Science and Engineering Nanjing Tech University Nanjing 211816 China
Funding
National Natural Science Foundation of China · Priority Academic Program Development of Jiangsu Higher Education Institutions
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