Organic coated composite semiconductor material and preparation method and application thereof

The invention discloses an organic coated composite semiconductor material as well as a preparation method and application thereof, and belongs to the field of semiconductor materials. The invention relates to an organic coated composite semiconductor material. The composite semiconductor material comprises small organic molecules and a semiconductor, the small organic molecules are coated on the surface of the semiconductor. Compared with an initial semiconductor, the coated semiconductor introduces small organic molecules to the surface of the initial semiconductor. The photoresponse range of the semiconductor is widened through charge transfer interaction, and the charge separation efficiency is improved; the coated semiconductor material has the properties of wide light response range and high charge separation; the hydrogen production efficiency of ZnS coated with double-end phenyl viologen is basically kept unchanged within 48 hours under irradiation of a 300W AM1.5 sunlight simulated xenon lamp; and th