Display substrate, method for manufacturing the same and display device

A display substrate, comprising a base substrate, a pixel layer comprising multiple sub-pixel units on a side of the base substrate, and a light processing layer comprising a condensed-ring conjugated polymer at least on a side of the pixel layer away from the base substrate,

• wherein the light processing layer allows light emitted by the sub-pixel units at corresponding positions to pass through and prevents at least partially other light,
• wherein the light processing layer includes a first visible light absorption layer as a whole layer, and a polymer containing nonfullerene in the first visible light absorption layer has visible light absorption groups for light having colors other than the sub-pixels at corresponding positions, wherein the visible light absorption groups include at least one of a two-dimensional condensed-ring electron acceptor, a hepta-condensed ring electron acceptor, an octo-condensed ring electron acceptor, a nona-condensed ring electron acceptor, a deca-condensed ring electron acceptor, a undec-condensed ring electron acceptor, a bis-fluoro pyrrole borane derivative, a retinene-like structure, a condensation compound of isophthalic acid dimethyl or dimethyl terephthalate, and alkoxy acetophenone,
• wherein the display substrate further comprises a control circuit layer between the base substrate and the pixel layer,
• wherein the display substrate also includes a photoelectric conversion unit connected to both the control circuit layer and the light processing layer for converting the light absorbed by the light processing layer into electrical energy and providing the electrical energy to the control circuit layer,
• wherein the photoelectric conversion unit includes a solar electrode which has an orthographic projection not overlap with the orthographic projection of the multiple sub-pixel units in the plane of the base substrate.