Thermoelectric Properties of TlCu3Te2 and TlCu2Te2

Abstract

2À ) 4 , in order to understand the relationship between the thermoelectric properties (especially the lattice thermal conductivity j lat ) and the valence states of Tl. The thermal conductivity of TlCu 2 Te 2 is high (about 8 W m À1 K À1 ), while that of TlCu 3 Te 2 is extremely low (around 0.5 W m À1 K À1 ) like other thallium tellurides. This high j of TlCu 2 Te 2 was caused not only by its large electronic contribution but also by its intrinsically high j lat . The present study implies that the valence states of Tl would play some important roles in determining the magnitude of j lat .

Electrochemical Deposition of the Single Phase TlxCu3 – xSe2 Thin Films

“…(1) (2) After that, the metals Cu 2+ ( Figure 4A) and Tl + ( Figure 4B) were studied in the presence of H 2 SeO 3 and then, the electrochemical profiles of all species together in solution ( Figure 4C). Figure 4 shows the electrochemical behavior for the binary and ternary systems.…”

“…1 In particular, copper thallium selenides are of interest for the development of advanced thermoelectric materials. 2 The crystals of TlCu 2 Se 2 (TCSe) consist of layered structures, where the Tl + ions are located above and below the layers. 3,4 The unit cell can be seen in Figure 1.…”

THE Tl4PbTe3-Tl9GdTe6-Tl9BiTe6 ISOPLETH SECTION OF THE Tl-Pb-Bi-Gd-Te SYSTEM

“…Heavy metal chalcogenides, multicomponent phases and composites based thereon are valuable functional materials [1][2][3]. In recent years, interest in complex thallium chalcogenides has increased due to topological insulators [4][5][6], Weyl semimetals [6] and thermoelectric materials with anomalously low thermal conductivity [8][9][10]. Some of these compounds have photoconductivity and are promising for use as detectors of γ and X-ray radiation [11,12].…”

THE Tl9ErTe6–Tl9BiTe6 SYSTEM AND SOME PROPERTIES OF SOLID SOLUTIONS

“…Complex thallium chalcogenides attracted increased interest as topological insulators [1,2], Weyl semimetals [3] and thermoelectric materials with anomalously low thermal conductivity [4,5]. Some of these compounds have photoconductivity and are promising for use as detectors of and X-ray radiation [6].…”