Display panel and display device having first transistor including first drain electrode and first source electrode made of different materials

A display panel, comprising:

• a substrate;
• a driving unit comprising a first transistor, the first transistor comprising a first source electrode and a first drain electrode;
• and
• at least one light-emitting element, each of the at least one light-emitting element comprising a first electrode, a light-emitting layer, and a second electrode that are sequentially vertically stacked, the first electrode being connected to the first drain electrode through a first via, and the first drain electrode being located at a side of the first source electrode close to the substrate,
• wherein the first source electrode and the first drain electrode are located at a side of the at least one light-emitting element close to the substrate, and wherein a material of the first drain electrode is different from a material of the first source electrode,
• wherein the first transistor comprises a first active layer containing silicon;
• wherein the driving unit further comprises a second transistor, and the second transistor comprises a second source electrode, a third drain electrode, a second gate electrode, and a second active layer;
• wherein the second active layer comprises an oxide semiconductor and is located at a side of the first active layer facing away from the substrate, and the second source electrode, the third drain electrode, and the first source electrode are located in a same layer;
• wherein the second gate electrode is located between the second active layer and the second source electrode, or located between the second active layer and the first active layer;
• and
• wherein the first drain electrode and the second gate electrode are located in a same layer, or the first drain electrode and the second active layer are located in a same layer.

A display panel, comprising:

• a substrate;
• a driving unit comprising a first transistor, the first transistor comprising a first source electrode and a first drain electrode;
• at least one light-emitting element, each of the at least one light-emitting element comprising a first electrode, a light-emitting layer, and a second electrode that are sequentially vertically stacked, the first electrode being connected to the first drain electrode through a first via, and the first drain electrode being located at a side of the first source electrode close to the substrate, and
• a light shielding layer located between the first drain electrode and the first electrode and made of a material different from the material of the first drain electrode, wherein at least one first opening is formed in the light shielding layer, and an orthographic projection of the first via on the substrate is located within an orthographic projection of one of the at least one first opening on the substrate,
• wherein the first source electrode and the first drain electrode are located at a side of the at least one light-emitting element close to the substrate, and wherein a material of the first drain electrode is different from a material of the first source electrode.