Light-emitting substrate, manufacturing method thereof and display panel

[0001] A light-emitting substrate is disclosed. The light-emitting substrate includes a backplate, a light-emitting layer, and a plurality of first optical elements. The light-emitting layer is located on one side of the backplate; the light-emitting layer includes a plurality of light-emitting units arranged in an array. Each first optical element includes a first optical portion and a second optical portion; the first optical portion fills the gap between two adjacent light-emitting units, and the second optical portion is located on the side of the light-emitting layer away from the backplate and connected to the first optical portion. The second optical portion includes a first surface extending outward from the edge of the first optical portion.