title: Thermoelectric properties and chlorine doping effect of In4Pb0.01Sn0.03Se2.9Clx polycrystalline compounds.
abstract: We investigated the thermoelectric properties of Cl-doped polycrystalline compounds In4Pb0.01Sn0.03Se2.9Clx (x = 0.02, 0.04, and 0.06). X-ray diffraction measurement shows a gradual change in lattice volume for x ≤ 0.04 without any impurity phases indicating a systemic change in Cl doping. The Cl doping in the compounds has the effect of increasing carrier concentration and the effective mass of carriers, resulting in an increase in power factor at a high temperature (∼700 K). Because of the increased electrical conductivity at a high temperature, the dimensionless thermoelectric figure of merit ZT reaches 1.25 at 723 K for the x = 0.04 Cl-doped compound, which is a relatively high value for n-type polycrystalline materials.
authors.affiliation: Department of Applied Physics and Institute of Natural Sciences, Kyung Hee University, Yongin 446-701, Korea. jsrhyee@khu.ac.kr.
authors.forename: Jin
authors.initials: J
authors.lastname: Hee Kim
authors.forename: Min
authors.initials: M
authors.lastname: Jae Kim
authors.forename: Suekyung
authors.initials: S
authors.lastname: Oh
authors.forename: Jong-Soo
authors.initials: JS
authors.lastname: Rhyee
authors.forename: Su-Dong
authors.initials: SD
authors.lastname: Park
authors.forename: Docheon
authors.initials: D
authors.lastname: Ahn