Ethylammonium lead bromide is primarily used in the development of perovskite solar cells due to its excellent light absorption and charge transport properties. Its application in photovoltaics enables the creation of highly efficient and cost-effective solar panels. Additionally, it is explored in optoelectronic devices, such as light-emitting diodes (LEDs) and photodetectors, owing to its tunable bandgap and strong luminescence. Research is also ongoing to utilize it in next-generation display technologies and laser systems, where its unique optical properties can enhance performance.