Sie befinden Sich nicht im Netzwerk der Universität Paderborn. Der Zugriff auf elektronische Ressourcen ist gegebenenfalls nur via VPN oder Shibboleth (DFN-AAI) möglich. mehr Informationen...
Enhanced thermoelectric performance of bulk tin telluride: Synergistic effect of calcium and indium co-doping
Ist Teil von
Materials today physics, 2018-03, Vol.4, p.12-18
Ort / Verlag
Elsevier Ltd
Erscheinungsjahr
2018
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
SnTe based materials are considered recently as a lead-free replacement of the well-known PbTe based thermoelectric (TE) materials in addressing the energy crisis worldwide. Herein we report both experimental and theoretical study on the effect of co-doping of calcium and indium on electronic structure and TE properties of SnTe. We show that the resonant levels introduced by indium and band gap opening caused by calcium, valence band convergence induced by both calcium and indium, synergistically increases the Seebeck coefficient for a wide range of temperatures. The co-doped SnTe with a high ZT of ∼1.65 at 840 K and record high power factor of ∼47 μWcm−1K−2 for SnTe based materials make it a promising material for TE applications.
[Display omitted]
•Band convergence and resonance level playing a major role.•Synergistic action of Ca-In co-doping in SnTe.•Record high power factor of ∼47μWcm−1K−2 for SnTe based materials.•Record high ZT of 1.65 for SnTe based materials.