C 60-doping of nanostructured Bi-Sb-Te thermoelectrics

42Citations
Citations of this article
16Readers
Mendeley users who have this article in their library.
Get full text

Abstract

New bulk nanocomposite thermoelectric materials composed from nanocrystallites of Bi-Sb-Te alloys covered by C 60 molecules have been synthesized and studied. The fullerene molecules provide thermal phonons blocking and particular charge transfer in the nanocomposite. The molecules act as electron traps, and thus decrease the density of free electrons in n-type semiconductor and generate holes in p-type materials. The capture of electrons is not accompanied by shifts of the Raman bands in C 60 spectra. The density of free charge carriers and their Hall mobility change nonmonotonically with the increase of fullerene content in Bi-Sb-Te-C 60 nanocomposites. The maximum value of thermoelectric figure of merit ZT = 1.15 was obtained in p-type nanocomposite that is 30% higher than in the undoped starting material. The observed phenomenon provides new ways for transport properties optimization of thermoelectric materials and thermoelectric devices efficiency increase. © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Cite

CITATION STYLE

APA

Popov, M., Buga, S., Vysikaylo, P., Stepanov, P., Skok, V., Medvedev, V., … Blank, V. (2011). C 60-doping of nanostructured Bi-Sb-Te thermoelectrics. Physica Status Solidi (A) Applications and Materials Science, 208(12), 2783–2789. https://doi.org/10.1002/pssa.201127075

Register to see more suggestions

Mendeley helps you to discover research relevant for your work.

Already have an account?

Save time finding and organizing research with Mendeley

Sign up for free