Light emitting diode and preparation method thereof, array substrate and electronic device

A preparation method of a light emitting diode comprising:

• providing a substrate;
• and
• forming a first electrode, a quantum rod light emitting layer and a second electrode in lamination on the substrate;
• wherein, the quantum rod light emitting layer comprises a plurality of quantum rods which present a directional arrangement,
• wherein the preparation method further comprises forming a third electrode and a fourth electrode on the substrate, wherein the third electrode and the fourth electrode are configured to generate an electric field in parallel with or substantially in parallel with a plane of the substrate in a powered state, and
• wherein the third electrode is a comb-shared electrode.

A light emitting diode comprising:

• a substrate, and
• a first electrode, a quantum rod light emitting layer and a second electrode disposed in lamination on the substrate,
• wherein the quantum rod light emitting layer comprises a plurality of quantum rods which present a directional arrangement, and
• wherein the first electrode is a comb-shaped electrode.