Synthesis, crystal structure, electronic structure, and photoelectric response properties of KCu2SbS3

A new layered compound KCu₂SbS₃ was synthesized via a facile reactive flux method. The compound, whose crystal structure features [Cu₂SbS₃]⁻ layers packing along [001], possesses a direct-transition band gap of 1.7 eV. Photoelectric measurement demonstrates the potential for applications in photovoltaic devices.