K2Hg2Se3: Large-Scale Synthesis of a Photoconductor Material Prototype with a Columnar Polyanionic Substructure
G. Thiele, S. Lippert, F. Fahrnbauer, P. Bron, O. Oeckler, A. Rahimi-Iman, M. Koch, B. Roling, S. Dehnen – 2015
K2Hg2Se3, a new photoconducting material with a direct band gap around 1.4 eV, was obtained in nearly quantitative yields and large scale (50 g per batch) by means of solvothermal treatment of a corresponding solid. The compound comprises covalently linked selenidomercurate columns that accommodate potassium counterions. Composition and structure allow for a specific combination of optoelectronic, photophysical, and thermoelectric properties, which initiates a systematic material development within this family of compounds.