Thermoelectric Properties of Polycrystalline n-Type Pb5Bi6Se14
作者： S. Sassi , C. Candolfi , V. Ohorodniichuk , C. Gendarme , P. Masschelein
DOI: 10.1007/S11664-016-4976-5
关键词: Thermoelectric effect 、 Condensed matter physics 、 Atmospheric temperature range 、 Seebeck coefficient 、 Perpendicular 、 Crystal structure 、 Crystallite 、 Materials science 、 Homologous series 、 Thermal conductivity 、 Mineralogy
摘要: Chalcogenides are currently receiving attention due to their interesting thermoelectric properties that stem from complex crystal structures and semiconducting properties. Here, we report on the synthesis measurements of transport in a broad temperature range (2–723 K) polycrystalline n-type Pb5Bi6Se14, member homologous series (PbSe)5(Bi2Se3)3m (m = 1), assess its potential shed light basic mechanisms governing low-temperature transport. The anisotropic structure gives rise differ samples measured parallel or perpendicular pressing direction. show this compound exhibits semiconducting-like with thermopower values reach 250 μV K−1 at 723 K. lattice thermal conductivity very low whole (∼0.5 W m−1 K−1) close theoretical minimum estimated sound velocities. Thanks remarkable property, peak ZT 0.5 is achieved 720
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