Ray detector, preparation method and electronic equipment

The invention provides a ray detector, a preparation method and electronic equipment, belongs to the technical field of semiconductors, and can solve the problem of high preparation cost. The invention discloses a preparation method of a ray detector. The preparation method comprises the steps of preparing a buffer layer on a first surface of a substrate; wherein the first surface of the substrate comprises a first area and a second area; preparing a shared layer on the surface, away from the substrate, of the buffer layer; processing the sharing layer corresponding to the first region to obtain an active layer of the thin film transistor; and processing the sharing layer corresponding to the second region to obtain the absorption layer of the photodiode.