solid state lighting (LED) (SSL)

The term Solid State Lighting (SSL) is the generic term for all lighting components that operate on a semiconductor basis and emit light as a result of electroluminescence.

SSL components include light-emitting diodes(LEDs) and their many variants, as well as OLEDs working with organic materials, flexible OLEDs ( FOLED), polymer LEDs ( PLED), stacked OLEDs( SOLED) and transparent OLEDs( TOLED). In addition, LED matrices and LED arrays.

SSL components are cold light sources that convert the supplied energy into light. Electroluminescence is the ability of semiconductors to displace electrons with simultaneous emission of photons. This occurs by an electron or quantum jump from one shell of the Bohr atomic model to another. A quantum jump always occurs with absorption or emission of the energy difference. In the transition from a higher to a lower energy level, the energy is released in the form of a photon. The process of mutual absorption of energy and later return to the original state under radiation of light (photons) is called luminescence.