Composite anode, preparation method of composite anode, display panel and display device

A preparation method of a composite anode, comprising following steps:

• providing a light-transmitting conductive oxide and a composite material;
• depositing the light-transmitting conductive oxide to form a first conductive layer;
• depositing a metal on a side of the first conductive layer to form a total reflection layer;
• arranging the composite material on a side of the total reflection layer away from the first conductive layer to form a composite material layer;
• and
• depositing the light-transmitting conductive oxide on a side of the composite material layer away from the first conductive layer to form a second conductive layer.

A display panel, comprising:

• a substrate;
• an insulating layer, arranged on a side of the substrate;
• a composite anode comprising:
• a first conductive layer;
• a total reflection layer, arranged on a side of the first conductive layer;
• a composite material layer, arranged on a side of the total reflection layer away from the first conductive layer, an edge of the composite material layer being connected to the first conductive layer;
• and
• a second conductive layer, arranged on a side of the composite material layer away from the first conductive layer, an edge of the second conductive layer being connected to the first conductive layer;
• wherein the composite material layer comprises an indium tin oxide and a carbon nanotube;
• or a composite anode obtained by following steps:
• providing a light-transmitting conductive oxide and a composite material;
• depositing the light-transmitting conductive oxide to form a first conductive layer;
• depositing a metal on a side of the first conductive layer to form a total reflection layer;
• arranging the composite material on a side of the total reflection layer away from the first conductive layer to form a composite material layer;
• and
• depositing the light-transmitting conductive oxide on a side of the composite material layer away from the first conductive layer to form a second conductive layer;
• wherein the composite anode is arranged on a side of the substrate and is located on a same side as the insulating layer, the composite anode is partially embedded in the insulating layer, and both ends of the composite anode are located on a side of the insulating layer away from the substrate;
• a light-emitting layer, arranged on a side of the composite anode away from the substrate;
• and
• a cathode, arranged on a side of the light-emitting layer away from the substrate.