Ordered sphalerite derivative Cu<sub>5</sub>Sn<sub>2</sub>S<sub>7</sub> : a degenerate semiconductor with high carrier mobility in the Cu–Sn–S diagram - Université de Rennes Accéder directement au contenu
Article Dans Une Revue Journal of Materials Chemistry A Année : 2021

Ordered sphalerite derivative Cu5Sn2S7 : a degenerate semiconductor with high carrier mobility in the Cu–Sn–S diagram

P. Lemoine
Denis Menut
  • Fonction : Auteur
Christophe Candolfi
Bernard Malaman
Jean Juraszek

Résumé

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.
Fichier principal
Vignette du fichier
Kumar et al - 2021 - Ordered sphalerite derivative Cu5Sn2S7.pdf (3.46 Mo) Télécharger le fichier
Kumar_d1ta01615f1.pdf (1.28 Mo) Télécharger le fichier
Origine : Fichiers produits par l'(les) auteur(s)

Dates et versions

hal-03211806 , version 1 (18-10-2021)

Identifiants

Citer

Ventrapati Pavan Kumar, P. Lemoine, Virginia Carnevali, Gabin Guélou, Oleg Lebedev, et al.. Ordered sphalerite derivative Cu5Sn2S7 : a degenerate semiconductor with high carrier mobility in the Cu–Sn–S diagram. Journal of Materials Chemistry A, 2021, 9 (17), pp.10812-10826. ⟨10.1039/d1ta01615f⟩. ⟨hal-03211806⟩
90 Consultations
228 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More