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

Guang Han, Srinivas R. 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

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42 Citations (Scopus)

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 to p-type SnSe nanostructures. A surfactant-free aqueous solution methodology has been developed for the straightforward synthesis of SnSe nanoplates in gram quantities. These nanoplates can be hot-pressed into nanostructured compacts with much higher thermoelectric power factors than surfactant-prepared products and comparable values to bulk polycrystalline counterparts.

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

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All Science Journal Classification (ASJC) codes

  • Catalysis
  • Chemistry(all)

Cite this

Han, G., Popuri, S. R., Greer, H. F., Bos, J. W. G., Zhou, W., Knox, A. R., ... Gregory, D. H. (2016). Facile surfactant-free synthesis of p-type snse nanoplates with exceptional thermoelectric power factors. Angewandte Chemie - International Edition, 55(22), 6433-6437. https://doi.org/10.1002/anie.201601420