Is semiconductors can only be doped with pentavalent impurity?

The pentavalent impurities have five valence electrons in it. The semiconductor which joins with the n-type impurity to produce the free electrons are n-type semiconductor. Hence the addition of the pentavalent impurity to a semiconductor produces many free electrons. Thus the option (A) is correct.

What is the effect of adding impurity atom to semiconductor?

Addition of impurity will change the conductor ability and it acts as a semiconductor. The process of adding an impurity to an intrinsic or pure material is called doping and the impurity is called a dopant. After doping, an intrinsic material becomes an extrinsic material.

Why we can’t add 2nd column or 6th column elements as impurities to semiconductors?

Sulphur, S, selenium, Se, and tellurium, Te, all work as dopings in both III-V (e.g. GaAs) and group IV (e.g. Si) semiconductors. These group VI elements are not as good as the more ordinary dopants in germanium and silicon. They tend to form deep levels, traps, as well as shallow donor levels.

When a semiconductor is doped with a p-type impurity each impurity atom will?

Answer : When a p-type impurity is added in a pure semiconductor, a large number of holes are created. Thus, each impurity atom is deficient of one electron and they accept the electrons which are loosely bound to other neighboring atoms. So, each impurity atom acquires negative charges.

When pentavalent impurity is added to a pure semiconductor?

When a pentavalent impurity is added to a pure semiconductor, it becomes n-type semiconductor. Doping is the process of adding impurities to intrinsic semiconductors to alter their properties. Normally trivalent and pentavalent elements are used to dope silicon and germanium.

When a pentavalent impurity is added to a pure semiconductor it because?

When a pentavalent impurity ( such as As, P or Sb of group 5 of the periodic table) is added to a pure semiconductor, it becomes n-type semiconductor . In this, the electrons are the majority charge carriers and holes are the minority charge carriers.

Why impurity is added to a pure semiconductor?

Doping a pure semiconductor can have quite marked effect on the conductivity of the material. The addition of one impurity atom in one hundred million will increase the conductivity by 11 times at room temperature.

Why the impurities are being added in semiconductor materials?

When foreign atoms are introduced into a semiconductor material, the characteristics of the material change. By doping a semiconductor (by adding impurities to an intrinsic semiconductor, see Intrinsic Carrier Concentration), we can manipulate the equilibrium behavior of the material.

What is Group III impurity from the following?

Group III elements are known as donor impurity because these elements consist of 3 electrons in the valence shell. Thus is known as trivalent impurity. Elements like boron, aluminium, indium and gallium are examples of trivalent impurity.

How pentavalent and trivalent impurities are required to add to make the semiconductors more powerful?

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.

When an intrinsic semiconductor is doped with pentavalent impurity The semiconductor is?

N-type semiconductor
What type of material is obtained when an intrinsic semiconductor is doped with pentavalent impurity? Explanation: N-type semiconductor is obtained by doping an intrinsic semiconductor with pentavalent impurity atoms.