Organic light emitting diode, manufacturing method thereof, display panel, and display device

The invention discloses an organic light emitting diode, a manufacturing method thereof, a display panel and a display device, and belongs to the field of display technology. The organic light emitting diode includes an anode layer, a light emitting layer and a light adjustment module. The light emitting layer is located between the anode layer and the light adjustment module. The light adjustment module comprises at least two cathode layers, and a coating layer is disposed between any two of the cathode layers. According to the invention, the problem of low light emission efficiency of an OLED in the prior art is solved, and the front light emission efficiency of the OLED is improved. The invention is applied to a virtual reality display device.