TY - JOUR
T1 - Ordered sphalerite derivative Cu5Sn2S7: a degenerate semiconductor with high carrier mobility in the Cu-Sn-S diagram
AU - Lemoine, Pierric
AU - Fornari, Marco
AU - Al Rahal Al Orabi, Rabih
N1 - Funding Information:
The authors gratefully thank Christelle Bilot and Jerôme Lecourt for technical support. The authors acknowledge SOLEIL for provision of synchrotron radiation facilities and would like to thank Andrea Zitolo and Gautier Landrot for assistance in using beamline SAMBA. The authors acknowledge the nancial support of the French Agence Nationale de la Recherche LabEx EMC3 through the Project FACTO (Grant No. ANR-10-LABX-09-01), the Normandy Region (Réseau d'Intérêt Normand – Label d'excellence), CARNOT ESP and FEDER.
Publisher Copyright:
© The Royal Society of Chemistry.
PY - 2021
Y1 - 2021
N2 - Regardless of the complexity of the phase diagram of the Cu-Sn-S system, several compositions near the prototypical mohite Cu2SnS3 have arisen as potential non-toxic, earth-abundant and cost-efficient photovoltaic and thermoelectric materials. In this work, we revisited the Cu2+xSn1-xS3 system and discovered a monoclinic (C2) ordered sphalerite derivative member, Cu5Sn2S7. Using a combination of synchrotron diffraction and spectroscopy, transmission electron microscopy, precession-assisted electron diffraction tomography, Mössbauer spectroscopy, first principles calculations and transport properties measurements, we discuss the structure-thermoelectric properties relationships and clarify the interesting crystal chemistry in this system. The ternary sulfide Cu5Sn2S7 exhibits a degenerate semiconducting behavior with exceptionally high hole mobility originating from the interplay between atomic ordering and charge delocalization. This journal is
AB - Regardless of the complexity of the phase diagram of the Cu-Sn-S system, several compositions near the prototypical mohite Cu2SnS3 have arisen as potential non-toxic, earth-abundant and cost-efficient photovoltaic and thermoelectric materials. In this work, we revisited the Cu2+xSn1-xS3 system and discovered a monoclinic (C2) ordered sphalerite derivative member, Cu5Sn2S7. Using a combination of synchrotron diffraction and spectroscopy, transmission electron microscopy, precession-assisted electron diffraction tomography, Mössbauer spectroscopy, first principles calculations and transport properties measurements, we discuss the structure-thermoelectric properties relationships and clarify the interesting crystal chemistry in this system. The ternary sulfide Cu5Sn2S7 exhibits a degenerate semiconducting behavior with exceptionally high hole mobility originating from the interplay between atomic ordering and charge delocalization. This journal is
M3 - Article
JO - Journal of Materials Chemistry A
JF - Journal of Materials Chemistry A
SN - 2050-7488
ER -