TY - JOUR
T1 - Toppling the Transport Properties with Cationic Overstoichiometry in Thermoelectric Colusite
T2 - [Cu26Cr2Ge6]1+δS32
AU - Guélou, Gabin
AU - Pavan Kumar, Ventrapati
AU - Bourhim, Abdelhamid
AU - Lemoine, Pierric
AU - Raveau, Bernard
AU - Supka, Andrew
AU - Lebedev, Oleg I.
AU - Al Rahal Al Orabi, Rabih
AU - Fornari, Marco
AU - Suekuni, Koichiro
AU - Guilmeau, Emmanuel
N1 - Funding Information:
The authors would like to thank Christelle Bilot and Jerôme Lecourt for technical support and the financial support of the French Agence Nationale de la Recherche (ANR-15-CE05-0027), FEDER and Region Normandy. K.S. thanks the International Joint Research Program for Innovative Energy Technology funded by the Ministry of Economy, Trade and Industry (METI), Japan. M.F. and A.S. acknowledge collaboration with the AFLOW Consortium ( http://www.aflow.org ) under the sponsorship of DOD-ONR (Grants N000141310635 and N000141512266).
Publisher Copyright:
© 2020 American Chemical Society.
PY - 2020/5/26
Y1 - 2020/5/26
N2 - The excellent thermoelectric properties of colusite are known to be closely related to the nature of the cations at the core of the tetrahedral-octahedral complexes. Here, we demonstrate that cation overstoichiometry decreases the carrier concentration and also generates structural disorder, which modify the conduction mechanism in a way that resembles the effect of cation-size mismatch. This functionalization of the "Cu26S32" conductive network leads to a high figure of merit of 1.0 at 700 K. This study highlights the importance of the cationic arrangement and furthers our understanding on the fascinating transport properties in colusite.
AB - The excellent thermoelectric properties of colusite are known to be closely related to the nature of the cations at the core of the tetrahedral-octahedral complexes. Here, we demonstrate that cation overstoichiometry decreases the carrier concentration and also generates structural disorder, which modify the conduction mechanism in a way that resembles the effect of cation-size mismatch. This functionalization of the "Cu26S32" conductive network leads to a high figure of merit of 1.0 at 700 K. This study highlights the importance of the cationic arrangement and furthers our understanding on the fascinating transport properties in colusite.
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U2 - 10.1021/acsaem.0c00726
DO - 10.1021/acsaem.0c00726
M3 - Article
AN - SCOPUS:85086308458
SN - 2574-0962
VL - 3
SP - 4180
EP - 4185
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 5
ER -