Cu9.1Te4Cl3: A Thermoelectric Compound with Low Thermal and High Electrical Conductivity

Vogel, Anna; Miller, Thomas; Hoch, Constantin; Jakob, Matthias; Oeckler, Oliver and Nilges, Tom (2019): Cu9.1Te4Cl3: A Thermoelectric Compound with Low Thermal and High Electrical Conductivity. In: Inorganic Chemistry, Vol. 58, No. 9: pp. 6222-6230

Abstract

Cu9.1Te4Cl3 is a new polymorphic compound in the class of coinage metal polytelluride halides. Copper is highly mobile, which results in multiple order-disorder phase transitions in a limited temperature interval from 240 to 370 K. Mainly as a consequence of thermal transport properties, the compound's thermoelectric figure of merit reaches values up to ZT = 0.15 in the temperature range between room temperature and 523 K. Its structure is closely related to that of Ag10Te4Br3, another coinage metal polytelluride halide, which represents the first p-n-p-switchable semiconductor approachable by a simple temperature change. The title compound outperforms Ag10Te4Br3 in terms of thermoelectric properties by 1 order of magnitude and therefore acts as a link between the class of p-n-p compounds and thermoelectric materials.

• Item Type: Journal article
• Faculties: Chemistry and Pharmacy > Department of Chemistry
• Subjects: 500 Science > 540 Chemistry
• ISSN: 0020-1669
• Language: English