Organic thin film transistor and manufacturing method therefor, array substrate, and display device

A method for manufacturing an organic thin film transistor, comprising:

• providing a substrate;
• forming a first electrode, an auxiliary electrode and a second electrode on the substrate, wherein the first electrode and the second electrode are spaced apart;
• the auxiliary electrode is located on the first electrode and in contact with the first electrode;
• and an orthographic projection of the auxiliary electrode on the substrate is located within an orthographic projection of the first electrode on the substrate;
• and
• forming an active layer, wherein the active layer includes a first overlap portion, an active portion and a second overlap portion that are connected in sequence;
• the first overlap portion is overlapped on the first electrode, the second overlap portion is overlapped on the second electrode, and the active portion is located between the first electrode and the second electrode;
• the auxiliary electrode and the first overlap portion have a distance therebetween;
• a material of the active layer is an organic semiconductor material, and a ratio of a thickness of at least one of the first electrode and the second electrode to a thickness of the active layer is in a range of 1:8 to 9:4, inclusive.