The application discloses a display panel, a
display device and a preparation method of the display panel. The display panel comprises a substrate, an encapsulation layer arranged on one side of the substrate, the encapsulation layer comprising a plurality of encapsulation grooves, a first
electrode layer arranged on the side of the encapsulation layer away from the substrate, the first
electrode layer being provided with a plurality of first
electrode openings, the
orthographic projection of the first electrode openings overlapping the
orthographic projection of the encapsulation grooves in the plane of the substrate, a high-refractive layer comprising a plurality of high-refractive parts, at least a part of each high-refractive part being arranged in the encapsulation groove, the
refractive index of the high-refractive part being greater than the
refractive index of the encapsulation layer, an electrochromic layer arranged on the side of the first electrode layer away from the substrate, and a second electrode layer arranged on the side of the electrochromic layer away from the substrate, the second electrode layer and the first electrode layer forming an
electric field to control the color change of the electrochromic layer. The display panel, the
display device and the preparation method of the display panel disclosed by the application can improve the
wetting problem of the electrochromic layer.