Facile Surfactant-Free Synthesis of p-type SnSe Nanoplates with Exceptional Thermoelectric Power Factors

Guang Han, Srinivasa Popuri, Heather F. Greer, Jan-Willem G Bos, Wuzong Zhou, Andrew R. Knox, Andrea Montecucco, Jonathan Siviter, Elena A. Man, Martin Macauley, Douglas J. Paul, Wen Guang Li, Manosh C. Paul, Min Gao, Tracy Sweet, Robert Freer, Feridoon Azough, Hasan Baig, Nazmi Sellami, Tapas K. MallickDuncan H. Gregory

Research output: Contribution to journalArticle

48 Citations (Scopus)
75 Downloads (Pure)

Abstract

A surfactant-free solution methodology, simply using water as a solvent, has been developed for the straightforward synthesis of single-phase orthorhombic SnSe nanoplates in gram quantities. Individual nanoplates are composed of (100) surfaces with (011) edge facets. Hot-pressed nanostructured compacts (Eg≈0.85eV) exhibit excellent electrical conductivity and thermoelectric power factors (S2σ) at 550K. S2σ values are 8-fold higher than equivalent materials prepared using citric acid as a structure-directing agent, and electrical properties are comparable to the best-performing, extrinsically doped p-type polycrystalline tin selenides. The method offers an energy-efficient, rapid route to p-type SnSe nanostructures.

Original languageEnglish
Pages (from-to)6433–6437
Number of pages5
JournalAngewandte Chemie International Edition
Volume55
Issue number22
Early online date20 Apr 2016
DOIs
Publication statusPublished - 23 May 2016

Keywords

  • Nanomaterials
  • Structures
  • Synthesis
  • Thermoelectrics
  • Tin selenide

ASJC Scopus subject areas

  • Chemistry(all)
  • Catalysis

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