Lichtemittierender

Lichtemittierender refers to the property of a material or device to emit light. This emission can occur through various physical processes, and the term is commonly used in the context of light-emitting diodes (LEDs), organic light-emitting diodes (OLEDs), and other electroluminescent or photoluminescent devices.

Electroluminescence is a phenomenon where a material emits light in response to an electric current passed through it. This is the fundamental principle behind LEDs and OLEDs. In LEDs, semiconductor materials are used, and when an electric current flows through the p-n junction, electrons and holes recombine, releasing energy in the form of photons. OLEDs utilize organic compounds that exhibit electroluminescence, allowing for flexible and transparent displays.

Photoluminescence, on the other hand, involves the emission of light after a material has absorbed photons. This process is seen in fluorescent and phosphorescent materials. Fluorescence is a rapid emission of light, while phosphorescence involves a delayed emission, often referred to as afterglow.

The specific wavelengths of light emitted by a lichtemittierender material are determined by its chemical composition and physical structure. This allows for the creation of light sources that produce specific colors, from visible light to ultraviolet and infrared radiation. The efficiency and spectrum of light emission are crucial parameters when designing and evaluating light-emitting technologies for applications such as lighting, displays, sensors, and indicators.