Which element is used in doping?

Which element is used in doping?

The correct answer is Arsenic. When doping a semiconductor, such as a group IV element silicon (Si), with arsenic (As), a pentavalent n-type dopant from group V in the periodic table (which has one more valence electron than the semiconductor).

What impurities could be used in doping?

Doping means the introduction of impurities into a semiconductor crystal to the defined modification of conductivity. Two of the most important materials silicon can be doped with, are boron (3 valence electrons = 3-valent) and phosphorus (5 valence electrons = 5-valent).

What type of impurity is silicon?

In silicon doping, there are two types of impurities: n-type and p-type. In n-type doping, arsenic or phosphorus is added in small quantities to the silicon. Both of these elements have five electrons in their outer orbitals and so they are not out of place when they get into the silicon crystalline structure.

What impurities are used to produce n-type and p-type silicon?

Pentavalent impurities Impurity atoms with 5 valence electrons produce n-type semiconductors by contributing extra electrons. Trivalent impurities Impurity atoms with 3 valence electrons produce p-type semiconductors by producing a “hole” or electron deficiency.

What is the role of doping of impurities in pure silicon or germanium?

Pure Silicon or Germanium are rarely used as semiconductors. When an impurity is added to silicon or germanium without modifying the crystal structure, an N-type material is produced. In some atoms, electrons have five electrons in their valence band such as arsenic (As) and antimony (Sb).

Which element would you use as an impurity to make germanium an N type semiconductor?

Germanium can be made an n-type semiconductor by doping it with pentavalent impurities, like phosphorus (P), arsenic (As), or antimony (Sb).

Which type of impurity doping in silicon leads to N-type semiconductor?

Generating an n-Type Semiconductor When doping a semiconductor, such as the group IV element silicon (Si), with arsenic (As), a pentavalent n-type dopant from group V in the periodic table (which has one more valence electron than the semiconductor), the dopant behaves as an electron donor.

Which element when doped into germanium would create an n-type semiconductor?

Properties. n-type semiconductors are not the pure semiconductors. They are extrinsic semiconductors. To get n-type semiconductor, pentavalent atoms like Arsenic (As), Phosphorus (P) are doped in an intrinsic semiconductor like Si, Ge etc.

Which is the trivalent impurity?

For trivalent impurity, since the trivalent atoms have valency as three that is, it is an element in which each atom has three valence electrons. For example, Indium, Gallium, Aluminum, Boron, etc. As trivalent impurities accept electrons from the covalent bonds of Si, Ge they create p type semiconductor.

Which element would you use as an impurity to make germanium an n-type semiconductor?

Which of the following donor impurity is used for germanium?

When a pentavalent impurity is added to an intrinsic or pure semiconductor (silicon or germanium), then it is said to be an n-type semiconductor. Pentavalent impurities such as phosphorus (P), arsenic (As), antimony (Sb), etc are called donor impurity.

What is the role of doping of impurities in pure silicon?

In semiconductor production, doping is the intentional introduction of impurities into an intrinsic semiconductor for the purpose of modulating its electrical, optical and structural properties. The doped material is referred to as an extrinsic semiconductor. Doping is also used to control the color in some pigments.