Low-temperature transport properties of n-type layered homologous compounds Bi_8−xSb_xSe₇

Abstract

Chalcogenide semiconductors and semimetals are a historical fertile class of materials for discovering novel compounds for energy conversion applications, such as photovoltaic cells or thermoelectric devices. Here, we report on...

Synthesis and physical properties of single-crystalline InTe: towards high thermoelectric performance

“…Nevertheless, as a first approximation, the theoretical relation 𝛼(𝑝) was calculated by considering a single-parabolic band model, assuming that acoustic phonon scattering prevails near room temperature, as often observed in chalcogenide semiconductors. 2,[62][63][64][65][66][67] In this model, 𝛼 and 𝑝 ) are given by the following expressions 68…”

“…This deviation from the theoretical trend possibly signals the breakdown of the present model due to the contribution of other bands as in SnTe, which is the canonical example of such a behaviour. 44,67,68 Additional InTe samples with higher hole concentrations should be studied in order to clarify this point. The good agreement between the SPB model and the experimental points over nearly two orders of magnitude further show that non-parabolic effects associated with the shape of the valence band around the Z point can be neglected up to hole concentrations of ~7.5 ´10 19 cm -3 .…”