“…Rather, the donor and acceptor components are typically designed such that upon photoexcitation, the relative energies of the FMOs favor electron transfer from donor to acceptor, while morphology is an aerthought that is optimized via trial and error. 20,23,24 Typically, two component systems are spin-coated together to create blended active layers, and the most common strategies for improving the mixing of donors and acceptors during this process include installing solubilizing side chains on the components, 19,25 solvent annealing, 26 adding insulating polymer llers, 27 adding peptide side chains, 28,29 or, alternatively, covalently linking the two together to create architectures such as diads, 30 triads, 31 donoracceptor alternating polymers, 32 and double-cable polymers. 33 Though these covalent strategies may improve heterojunction interface area, drawbacks include their cumbersome and time consuming syntheses, which limit the ability to establish structure-activity relationships, and their inability to predictably control molecular orientation on the nanoscale and lm structure on the micrometer length scale, which are both necessary to create contiguous and uniform percolation pathways from the site of charge separation to the electrodes.…”