Display Panel, Preparation Method Thereof and Display Device

A preparation method of a display panel, comprising:

• preparing a substrate plate, comprising a plurality of light-emitting areas and a plurality of non-light-emitting areas, wherein the plurality of light-emitting areas are spaced apart from each other by the plurality of non-light-emitting areas;
• preparing a light-emitting element in each of the plurality of light-emitting areas, wherein the light-emitting element comprises an anode and a cathode that are arranged opposite to each other, and a light-emitting layer located between the anode and the cathode;
• and
• preparing a cover layer on a light-emission side of the light-emitting element, wherein the cover layer comprises a substrate doped with first dopants, wherein the first dopants are magnetic;
• and wherein when an external magnetic field intensity applied to the cover layer is changed by an amount greater than a preset magnetic field intensity, the first dopants in the substrate are rearranged from a first mode to a second mode.