Hydrazine-hydrothermal syntheses, characterizations and photoelectrochemical properties of two quaternary chalcogenidoantimonates(III) BaCuSbQ3 (Q = S, Se)

Two isostructural quaternary chalcogenidoantimonates(III) BaCuSbQ 3 (Q = S, Se): BaCuSbS 3 ( 1 ) and BaCuSbSe 3 ( 2 ) have been successfully synthesized through a facile hydrazine-hydrothermal method. Both two compounds crystallize in the orthorhombic space group and feature a three-dimensional (3D) channeled [Cu 2 Sb 2 Q 6 ] 4- framework, which is constructed by the distorted tetrahedral CuQ 4 and pyramid SbQ 3 units via vertex sharing. Both optical properties and theoretical studies show 1 and 2 are semiconductors with narrow band gaps. In addition, their photoelectrochemical properties have been investigated.