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2. LED operating principle
The basic element of any light-emitting diode is a semiconductor with two regions of different conductivity (p- and n-type) and a region of radiative recombination of n (electrons) and p (holes) carriers. In its simplest expression, the design of an LED can be reduced to the junction of a p-doped semiconductor with the same n-doped semiconductor. This is known as a homojunction light-emitting diode. Conventional LEDs still use this structure today, but as we'll see later, the new high-intensity diodes use much more complex junctions.
Figure 2 illustrates the operating principle of a homojunction. At equilibrium, the majority carriers in each zone diffuse towards the other zone: electrons in zone n tend to diffuse towards zone...
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LED operating principle
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Bibliography
Bibliography
Standards and norms
Definitions and characteristics
- General lighting – Light-emitting diode (LED) products and related equipment – Terms and definitions – Modified by NF EN 62504/A1 (May 2018) - NF EN 62504 - 12-14
- Light and lighting – Measuring and presenting photometric data for lamps and luminaires – Part 4: LED lamps, modules and luminaires - NF EN 13032-4+A1 - 06-15
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Regulation (EU) No 1194/2012 of December 12, 2012 implementing Directive 2009/125/EC of the European Parliament and of the Council with regard to ecodesign requirements for directed lamps, light-emitting diode lamps and related equipment, amended
Regulation No 1428/2015 of August 25, 2015 amending Commission Regulation...
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