Homogenously hexagonal prismatic AgBiS2 nanocrystals: controlled synthesis and application in quantum dot-sensitized solar cells

Homogenously hexagonal prismatic AgBiS2 nanocrystals with sizes of about 7.6 nm have been synthesized by the selective absorption of oleylamine and anisotropic growth in a mixed solvent system. Quantum dot-sensitized solar cells with the as-prepared AgBiS2 nanocrystals as counterelectrode materials showed a conversion efficiency of 2.09% compared with that of Pt (1.73%).