OLED light-emitting unit, OLED substrate and method for manufacturing OLED light-emitting unit

An OLED light-emitting unit, applied in a top-emission OLED substrate, comprising:

• an anode, a cathode, and an organic functional layer arranged between the anode and the cathode,
• wherein the anode comprises a first metal layer and a second metal layer, and the first metal layer and the second metal layer are stacked along a thickness direction of the second metal layer, a separation layer is arranged between the first metal layer and the second metal layer, and a thickness of the second metal layer is smaller than 40 nm such that metal atoms of the second metal layer are capable of being thermally agglomerated and being rearranged under a preset condition to form a concave-convex structure on a surface of the second metal layer;
• wherein the first metal layer and the second metal layer are separated by the separation layer, and the second metal layer excludes the concave-convex structure;
• wherein the preset condition comprises heating the second metal layer at a preset temperature for a preset time in an inert gas environment, wherein a thickness of a convex portion of the concavo-convex structure formed on the second metal layer is positively correlated with the heating temperature and the heating time;
• wherein the preset temperature is 100 degrees to 200 degrees, and the preset time is 1 hour to 5 hours.