PBDB-T-2Cl is widely used in the field of organic photovoltaics (OPVs) as a key component in the active layer of solar cells. Its high efficiency in converting sunlight into electricity makes it a popular choice for improving the performance of polymer solar cells. The material is particularly valued for its ability to enhance light absorption and charge transport properties, which are critical for achieving higher power conversion efficiencies. Additionally, PBDB-T-2Cl is employed in the development of flexible and lightweight solar panels, making it suitable for applications in portable electronics and wearable devices. Its compatibility with solution-processing techniques also allows for cost-effective and scalable manufacturing of solar cells. Researchers continue to explore its potential in tandem solar cells and other advanced photovoltaic technologies to further optimize energy harvesting.