The invention discloses functional modified
branch-shaped conjugated compounds, ink, membranes and applications. The
branch-shaped compounds have structures represented by a formula (I) or (II), wherein B is a branched conjugated link unit, and the B is selected from a unit which is formed by a five-membered or six-membered aromatic unit and has a branched structure; Core is a kernel functional modified unit; FG is a
tail-end functional modified unit; m is a branching degree of the B, and m is selected from 2 or 3; and n is a number of an iteration time of a repeating unit, and n is one selected from 1, 2, 3, and 4. The invention also discloses the ink, the membranes, preparation methods of the ink and the membranes and applications, wherein the ink and the membranes are based on the
branch-shaped conjugated compounds, the applications comprises an application in photoelectric response devices. The branch-shaped conjugated compounds provided by the invention have the advantages of high molecular weights, good solution workability, single and decided molecular structures,
narrow spectrum band gaps, good
sunlight spectral response in a long-wave direction, easiness to material purification, good
repeatability and the like, and the branch-shaped conjugated compounds are more beneficial for applications in
organic semiconductor devices.