Solid-state lighting (SSL) refers to a type of lighting that uses semiconductor light-emitting diodes (LEDs), organic light-emitting diodes (OLEDs), or polymer light-emitting diodes (PLEDs) as sources of illumination, offering higher energy efficiency and longer lifespans compared to traditional incandescent or fluorescent lighting. SSL technology is rapidly advancing and is integral to sustainable lighting solutions due to its potential to significantly reduce energy consumption and carbon emissions.