Electroluminescence is a phenomenon in which a material emits light when an electric current is passed through it. This process is commonly used in the production of light-emitting diodes (LEDs) and organic light-emitting diodes (OLEDs). Electroluminescent materials can be solid-state or organic in nature, and can emit light in a range of colors depending on the material used. Research in electroluminescence focuses on improving the efficiency, stability, and color range of these lighting technologies for applications in displays, lighting, and signage.