ZT enhancement in solution-grown Sb(2-x)Bi(x)Te3 nanoplatelets

Autor:	Scheele, Marcus, Oeschler, Niels, Veremchuk, Igor, Reinsberg, Klaus-Georg, Kreuziger, Anna-Marlena, Kornowski, Andreas, Broekaert, Jose, Klinke, Christian, Weller, Horst
Rok vydání:	2011
Předmět:	Condensed Matter - Materials Science
Zdroj:	ACS Nano 4 (2010) 4283
Druh dokumentu:	Working Paper
DOI:	10.1021/nn1008963
Popis:	We report a solution-processed, ligand supported synthesis of 15-20 nm thick Sb(2-x)Bi(x)Te3 nanoplatelets. After complete ligand removal by a facile NH3-based etching procedure, the platelets are spark plasma sintered to a p-type nanostructured bulk material with preserved crystal grain sizes. Due to this nanostructure, the total thermal conductivity is reduced by 60 % in combination with a reduction in electric conductivity of as low as 20 % as compared to the bulk material demonstrating the feasibility of the phonon-glass electron-crystal concept. An enhancement in the dimensionless thermoelectric figure of merit of up to 15 % over state-of-the-art bulk materials is achieved meanwhile shifting the maximum to significantly higher temperatures. Comment: 8 pages, 5 figures
Databáze:	arXiv
Externí odkaz:	http://arxiv.org/abs/1103.0913 Zobrazit plný text záznamu View this record from Arxiv