P-N junction. The diode

A diode is the simplest possible semiconductor device, the most interesting thing of which is the p- and n-type junction and the surrounding transition zone, where the two semiconductor crystals with different impurities connect and interact…

The diode as an element of the electric circuit

The height of the potential barrier formed in the diode – which prevents diffusion of the electrons from n-type silicon to p-type silicon – can be modified by external electric field…

The LED

A LED is a light emitting diode, in other words a light source made of semiconductor materials. Since a LED is a diode, it works like a diode. At the same time, while diodes are basically silicon based semiconductors, the p- and n-layers of a LED are manufactured from a compound with two or more constituent parts…