Organic Solar or photovoltaic cells (OSCs) have the potential of becoming productive renewable energy technology. In the active layers of OSCs, varying the positions of functional groups on the end group of acceptor molecules can significantly influence the electronic properties. To address the behavior of charges, localization and delocalization of electrons and its influences on the efficiencies of OSCs, we propose to synthesize - carbonyl-functionalized ladder-type oligo(p-phenylene)s (LnPCHO, n = 3, 4, 5, 6) via Suzuki cross-coupling, bromination, and carbonylation. It is anticipated to use the end carbonyl group as an infrared reporter to better understand the dynamics of charge transport and provide an additional handle for chemical modification and further functionalization. The synthesis and characterizations of the titled compounds will be presented in a poster.