Used as a key intermediate in the synthesis of organic semiconductors, particularly in the production of conjugated polymers for organic photovoltaics (OPVs) and organic field-effect transistors (OFETs). Its functional groups enable selective coupling reactions, making it valuable in constructing donor-acceptor type polymer backbones. The bromine atom allows for palladium-catalyzed cross-coupling reactions, while the aldehyde group can be further modified to introduce various side chains or functional moieties. Commonly employed in research settings to develop low-bandgap materials for improved light absorption and charge transport in flexible electronics and solar cells.