The present disclosure provides methods and compositions for an organic nanofiber-based heterojunction material, comprising nano fibers of an acceptor molecule, the nano fibers coated with a donor molecule, where the acceptor molecule contains a group and the donor molecule contains a companion group, wherein the group and companion group enables strong binding between the acceptor molecule and donor molecule, the strong binding providing for efficient forward electron transfer between the acceptor molecule and donor molecule, and wherein the group and companion group minimize charge carrier recombination between the acceptor molecule and the donor molecule.