The present disclosure relates to a display panel, a method for preparing the same and a display device. The display panel includes a first electrode, a light emitting structure, a second electrode and a scattering layer stacked in sequence. The second electrode is a transparent electrode. One side of the scattering layer away from the second electrode is configured as a light emergent side. The surface of the one side of the scattering layer away from the second electrode is a rough surface, and the RMS of the roughness of the rough surface ranges from 50 nm to 200 nm.