BaCuSbQ3 (Q = S, Se) were synthesized through a hydrazine-hydrothermal method.
BaCuSbQ3 (Q = S, Se) feature a 3D framework by single-crystal X-ray diffraction.
Experimental and theoretical studies confirm BaCuSbQ3 (Q = S, Se) are semiconductors.
Photoelectrochemical properties of BaCuSbQ3 (Q = S, Se) have been investigated.