Light Emitting Diodes (LEDs) are components that are based on specific semi-conductors, depending on the wavelength range.
If electricity flows through a light emitting diode in the forward direction, it emits energy in the form of visible light, infrared or even ultraviolet radiation. The wavelength or energy of the photons emitted by a light emitting diode of this kind depends upon the material and its energy gap.
Market drivers of LED technology are applications involving visible light, such as the lighting, advertising and automotive sectors.
White light is generated either as a composition of RGB (red, green and blue light), or as UV light that is converted by means of a layer of phosphorus. Further advances in UV-LED technology are therefore driven to a great extent by end applications in the visible spectrum, such as automotive headlights, for example.
More information:
