Display panel and preparation method of display panel

The invention discloses a display panel and a preparation method of the display panel. The display panel comprises an active layer and a down-conversion layer, wherein the down-conversion layer is arranged on at least one side of the active layer, the orthographic projection of the down-conversion layer covers the active layer, and the down-conversion layer converts blue light or ultraviolet lightemitted to the active layer into red light. Compared with an existing display panel, the display panel has the advantages that at least one down-conversion layer is additionally arranged in the display panel and used for converting blue light or ultraviolet light emitted to the active layer into red light, and due to the fact that the energy level of the red light is lower than that of the blue light and that of the ultraviolet light, the influence of the red light on the stability of the active layer is small; and meanwhile, a photomask process is omitted, the production cost is reduced, andthe transmittance and the