Colloidal AgSbSe2 nanocrystals: Surface analysis, electronic doping and processing into thermoelectric nanomaterials
OPEN ACCESS
Loading...
Author / Producer
Date
2016-06-07
Publication Type
Journal Article
ETH Bibliography
yes
Citations
Altmetric
OPEN ACCESS
Data
Rights / License
Abstract
We present a high-yield and scalable colloidal synthesis to produce monodisperse AgSbSe2 nanocrystals (NCs). Using nuclear magnetic resonance (NMR) spectroscopy, we characterized the NC surface chemistry and demonstrate the presence of surfactants in dynamic exchange, which controls the NC growth mechanism. In addition, these NCs were electronically doped by introducing small amounts of bismuth. To demonstrate the technological potential of such processed material, after ligand removal by means of NaNH2, AgSbSe2 NCs were used as building blocks to produce thermoelectric (TE) nanomaterials. A preliminary optimization of the doping concentration resulted in a thermoelectric figure of merit (ZT) of 1.1 at 640 K, which is comparable to the best ZT values obtained with a Pb- and Te-free material in this middle temperature range, with the additional advantage of the high versatility and low cost associated with solution processing technologies.
Permanent link
Publication status
published
External links
Editor
Book title
Journal / series
Volume
4 (21)
Pages / Article No.
4756 - 4762
Publisher
Royal Society of Chemistry
Event
Edition / version
Methods
Software
Geographic location
Date collected
Date created
Subject
Organisational unit
03934 - Kovalenko, Maksym / Kovalenko, Maksym
Notes
Published online 13 April 2016.
Funding
306733 - Chemically Engineered Nanocrystal Solids (EC)