Facile surfactant-free synthesis of p-type SnSe nanoplates with exceptional thermoelectric power factors

Guang Han, Srinivas Popuri, Heather Frances Greer, Jan-Willem Bos, Wuzong Zhou, Andrew Knox, Andrea Montecucco, Jonathan Siviter, Elena Man, Martin Macauley, Douglas Paul, Wen-guang Li, Manosh Paul, Min Gao, Tracy Sweet, Robert Freer, Feridoon Azough, Hasan Baig, Nazmi Sellami, Tapas MallickDuncan Gregory

Research output: Contribution to journalArticlepeer-review

87 Citations (Scopus)
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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 ∼ 0.85 eV) exhibit excellent electrical conductivity and thermoelectric power factors (S2σ) at 550 K. 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 both to p-type and n-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

  • Tin selenide
  • Synthesis
  • Structure
  • Thermoelectrics
  • Nanomaterials

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