Substrate and display panel

A substrate, comprising:

• a base;
• a pixel defining layer disposed on the base, the pixel defining layer including a plurality of through holes;
• a plurality of electrode pairs, wherein at least one electrode pair includes a first electrode and a second electrode disposed at least on a hole wall of one of the through holes and at least partially opposite to each other, and the first electrode and the second electrode are insulated from each other;
• and
• a plurality of light-emitting devices, wherein one of the plurality of light-emitting devices includes a liquid functional layer disposed in the through hole, a third electrode, a fourth electrode, a hole injection layer, a hole transport layer, an electron injection layer, and an electron transport layer,
• wherein the liquid functional layer is in direct contact with the first electrode and the second electrode, and the liquid functional layer includes a liquid light-emitting layer configured to emit light;
• the third electrode and the fourth electrode are both insulated from the first electrode and the second electrode, the third electrode is located at a side of the liquid functional layer proximate to the base, and the fourth electrode is located at a side of the liquid functional layer away from the base;
• the hole injection layer is located between the third electrode and the liquid functional layer;
• the hole transport layer is located between the hole injection layer and the liquid functional layer;
• the electron injection layer is located between the fourth electrode and the liquid functional layer;
• and
• the electron transport layer is located between the electron injection layer and the liquid functional layer.