Question: Which Is Better Silicon Or Germanium?

Why leakage current is more for germanium diode?

In Germanium and Silicon diodes, leakage current is only of few microamperes and nanoamperes, respectively.

Germanium is much more susceptible to temperature than silicon.

For this reason, mostly Silicon is used in modern semiconductor devices..

Why do we use silicon and germanium in semiconductors?

Silicon and germanium are used here effectively because they have 4 valence electrons in their outermost shell which gives them the ability to gain or lose electrons equally at the same time.

Why do we prefer silicon or germanium?

At room temperature, Silicon crystal has fewer free electrons than Germanium crystal. … However, Silicon crystals are not easily damaged by excess heat. Peak Inverse Voltage ratings of Silicon diodes are greater than Germanium diodes. Si is less expensive due to the greater abundance of element.

Why band gap of silicon is more than germanium?

The silicon atom electrons are more tightly bound to the nucleus than the germanium atom electrons due to its small size. So energy gap is more in that case.

Why Silicon is widely used?

Silicon is used for electronic devices because it is an element with very special properties. One of it’s most important properties is that it is a semiconductor. This means that it conducts electricity under some conditions and acts as an insulator under others. … Silicon is also an abundant element on Earth.

What is silicon diode?

Silicon Diodes, LED’s and Boltzmann’s Constant A diode is a widely used two-terminal circuit element that minimizes current flow in one direction (reverse bias), while easily carrying current in the other direction (forward bias). A semiconductor material that changes abruptly from p-type to n-type has this property.

Why is band gap important?

As the electronegativity difference Δχ increases, so does the energy difference between bonding and antibonding orbitals. The band gap is a very important property of a semiconductor because it determines its color and conductivity.

What is band gap of germanium?

List of band gapsGroupMaterialBand gap (eV) @ 302KIVDiamond5.5IVSilicon1.14IVGermanium0.67III–VGallium nitride3.47 more rows

What is the use of silicon and germanium?

Silicon-germanium is an important material that is used for the fabrication of SiGe heterojunction bipolar transistors and strained Si metal-oxide-semiconductor (MOS ) transistors for advanced complementary metal-oxide-semiconductor (CMOS ) and BiCMOS (bipolar CMOS) technologies.

Why is carbon not used as a semiconductor?

Carbon is not used as semiconductor it has 4 valence electrons in it valence shell but the energy gap is very small it will conduct electricity even at room temperature ,the size of carbon is very small .

Which diode is better silicon or germanium?

Ge has higher electron and hole mobility and because of this Ge devices can function up to a higher frequency than Si devices. The germanium diode is also superior to silicon diode in terms of energy loss, current loss, etc. The Ge diode loses only 0.3-0.4 a volt while a silicon diode loses about 0.6-0.7 volts.

What is the difference between silicon and germanium?

Each has four valence electrons, but germanium will at a given temperature have more free electrons and a higher conductivity. … Silicon is by far the more widely used semiconductor for electronics, partly because it can be used at much higher temperatures than germanium.

Why silicon is the best semiconductor?

Silicon is a good material for this because it is relatively easy to manipulate the conductive properties of silicon by “doping” it with other elements. While silicon is not the only semiconductor material out there, it is certainly much cheaper to create circuits with silicon as compared with other semiconductors.

What is forbidden energy gap?

The gap between valence band and conduction band is called as forbidden energy gap. As the name implies, this band is the forbidden one without energy. … The forbidden energy gap if greater, means that the valence band electrons are tightly bound to the nucleus.

Why is germanium not used for SCR?

Ability to withstand at high temperature: silicon crystals have capability to withstand at higher temperature compare to germanium crystals . So if leakage current is produced in SCR it heats up the device then silicon crystals can withstand but not germanium crystals.