Phenmethylammonium lead is primarily utilized in the development of perovskite solar cells, a cutting-edge technology in renewable energy. Its role is crucial in forming the light-absorbing layer of these cells, which significantly enhances their efficiency in converting sunlight into electricity. This material is favored for its excellent optoelectronic properties, including high light absorption and charge carrier mobility, making it a key component in advancing solar cell technology. Additionally, its application extends to research and development in photovoltaics, where it is studied for potential improvements in stability and performance of solar panels, aiming to make solar energy more accessible and cost-effective. It is also being explored for use in other optoelectronic devices such as LEDs and sensors due to its superior electrical and optical properties. However, handling requires caution due to the presence of lead, considering safety and environmental impacts.