What is the difference between a semiconductor diode and a microwave diode?

Answer 1

The primary difference is that a semiconductor diode is a diode with a p-n junction, and a light-emitting diode is a special case or special type of semiconductor diode that emits light when it is forward biased.

Answer 2

Diodes are mainly made up of silicon like semiconductors. It has a crystalline structure. Different types of diodes are available. For example pn junction, zener, point contact, tunnel, photo diode, LED, shockley, etc. When silicon is there it has 4 electrons in the valence shell and is bonded with 4 electrons of adjacent silicon atoms. By doping, that is adding impurities (group 13 or group 15) elements, we can increase the conductivity of a semiconductor by introducing p and n regions which shows holes and electrons were the majority charge carriers.

The semiconductor used in very early crystal diodes used as detectors in radios was galena (lead sulphide crystal) and used a stiff sharply pointed "cat's whisker" point contact. Naturally present impurities in the galena made doping unnecessary.

During WW2 germanium crystal point contact diodes were introduced for use in military radios. Naturally present impurities in the germanium made doping unnecessary.

Germanium junction diodes were introduced in the early 1950s (along with germanium junction transistors), silicon junction diodes and transistors were introduced in the late 1950s and took most of the market in the early 1960s.

Answer 3

Diode is used as an rectifier and for other applications . This diode is made up of Silicon material.

LED is made up of material Gallium Arsenide. When electrons jumps to upper orbit and again comes to the lower orbit it releases the photons the energy of the light particles. it is phospor coated like in flourscent lamp

Answer 4

A diode is a device that allows current to flow through it in only one direction.

A semiconductor diode is a diode that is created with solid state technology. Contrast this with the vacuum tube diode.

Answer 5

semiconductor:

1. semiconductor diodes conduct only for small voltages
2. reverse saturation current is less

power semiconductor:

1. power semiconductor diodes conduct for large voltages
2. reverse saturation current is high

Answer 6

LED works on the principle of Electroluminence

A Photo-Diode works on the principle of photoconduction

Answer 7

A microwave diode usually uses a type of semiconductor diode called a gunn diode. This type of diode has very high switching speed compared to other semiconductor diodes.