OLED with auxiliary electrode contacting electron transport layer

A manufacturing method of a display panel, comprising following steps:

• providing a driving circuit layer, wherein the driving circuit layer comprises a first surface and a second surface disposed opposite to each other;
• disposing a first electrode layer on the first surface;
• disposing an auxiliary electrode layer on the first surface, wherein the auxiliary electrode layer and the first electrode layer are disposed at a same level, and a gap is defined between the auxiliary electrode layer and the first electrode layer;
• covering a pixel definition layer on the driving circuit layer, the first electrode layer, and the auxiliary electrode layer, wherein a first via hole is defined on the pixel definition layer;
• and
• disposing an electron transport layer on a side of the pixel definition layer away from the driving circuit layer, wherein the electron transport layer is connected to the auxiliary electrode layer through the first via hole;
• wherein an energy level difference between a lowest unoccupied molecular orbital of the electron transport layer and a work function of the auxiliary electrode layer is 2.0 eV or less.