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

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• 作者：Dr. Guang Han ; Dr. Srinivas R. Popuri ; Dr. Heather F. Greer ; Dr. Jan-Willem G. Bos ; Prof. Wuzong Zhou ; Prof. Andrew R. Knox ; Dr. Andrea Montecucco ; Dr. Jonathan Siviter ; Dr. Elena A. Man ; Dr. Martin Macauley ; Prof. Douglas J. Paul ; Prof. Wen-guang Li ; Dr. Manosh C. Paul ; Dr. Min Gao ; Dr. Tracy Sweet ; Prof. Robert Freer ; Dr. Feridoon Azough ; Dr. Hasan Baig ; Dr. Nazmi Sellami ; Prof. Tapas K. Mallick and Prof. Duncan H. Gregory
• 刊名：Angewandte Chemie
• 出版年：2016
• 出版时间：May 23, 2016
• 年：2016
• 卷：128
• 期：22
• 页码：6543-6547
• 全文大小：3620K
• ISSN：1521-3757

文摘

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 (E_g≈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.