Display panel, preparation method thereof, and display device

A method for preparing a display panel, wherein the display panel is provided with a display area and a non-display area surrounding the display area;

• wherein the display panel comprises:
• a base substrate;
• an auxiliary electrode disposed on the base substrate and in the non-display area, a passivation layer disposed on a side, facing away from the base substrate, of the auxiliary electrode, and provided with a first opening in the non-display area, wherein in the first opening, an accommodating space is formed between the passivation layer and the auxiliary electrode, the accommodating space exposes at least part of the auxiliary electrode;
• and an orthographic projection of the passivation layer on the base substrate covers an orthographic projection of the accommodating space on the base substrate;
• and a cathode layer disposed on a side, facing away from the base substrate, of the passivation layer, and provided with a connecting portion in the accommodating space, the connecting portion being electrically connected to the auxiliary electrode;
• wherein the method comprises:
• successively forming a pattern of the auxiliary electrode and a pattern of the passivation layer over the base substrate;
• applying a voltage to the auxiliary electrode;
• and
• evaporating a cathode material on the passivation layer;
• wherein the cathode material carries charges that are electrically opposite to the voltage applied to the auxiliary electrode, and the cathode material, when being evaporated, is attracted to the accommodating space by the auxiliary electrode.