Polymer solar cells, also known as organic solar cells, are a type of photovoltaic cell that use organic polymers as the active material to convert sunlight into electricity. These cells are lightweight, flexible, and have the potential to be produced at low cost, making them a promising alternative to traditional silicon-based solar cells. They have the potential to be used in a wide range of applications, including portable electronics, building-integrated photovoltaics, and solar-powered vehicles. Research in this area focuses on improving the efficiency, stability, and scalability of polymer solar cells to make them a viable option for widespread commercialization.