journal article·2017-09-27

Solution-Processed CdS/Cu2S Superlattice Nanowire with Enhanced Thermoelectric Property

Ze Xiong, Yu Cai, Xiaodong Ren, Bei Cao, Jianjun Liu, Ziyang Huo, Jinyao Tang

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Abstract

Previously, the solution-based cation exchange reaction has been extensively studied for the synthesis of the complex heteroepitaxial nanocolloidals. Here, we demonstrated that the strain induced selective phase segregation technique can also be applied to large size nanowires in a well-studied CdS/Cu 2 S system, leading to the formation of superlattice nanowire structure with a simple solution-based cation exchange reaction. This structural evolution is driven by the distinct interface formation energy at different CdS facets as indicated by ab initio calculation. Because of the energy filtering effect, the superlattice nanowire shows an enhanced thermopower without significant decrease of the electrical conductivity. This study provides a promising low-cost solution process to produce superlattice nanostructures for practical thermoelectric applications.
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Research context

OpenAlex topics: Advanced Thermoelectric Materials and Devices · Quantum Dots Synthesis And Properties · Chalcogenide Semiconductor Thin Films

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

Affiliations

Department of Chemistry, The University of Hong Kong, Hong Kong 999077, China

State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China

State Key Laboratory of Synthetic Chemistry, The University of Hong Kong, Hong Kong 999077, China

State Key Laboratory of High-Performance Ceramics and Super Fine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, China

Queensland Micro- and Nanotechnology Center, Nathan Campus, Griffith University, Brisbane 4111, Australia

Funding

Research Grants Council, University Grants Committee · University Research Committee, University of Hong Kong

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