Extrinsic Semiconductor

An intrinsic semiconductor has $5\times {10}^{28}$ atoms and carrier concentration $1.5\times {10}^{16} {\mathrm{m}}^{-3}$. If it is doped by a pentavalent impurity in the ratio $1:{10}^6$, then calculate the number density of holes as charge carriers.

In a pure semiconductor crystal of $Si$, if antimony is added then what type of extrinsic semiconductor is obtained. Draw the energy band diagram of this extrinsic semiconductor so formed.

Which of the following energy band diagram shows the N-type semiconductor

A P-type semiconductor has more holes than electrons.

The hole density $\left({\eta }_h\right)$ and electron density $\left(n_e\right)$ in $p$-type semiconductors are related as

Range of energy required by electron of valance band to move into hole is $0.01-0.05 \mathrm{eV}$. The accepter energy level lies

Which of the following energy band diagram shows the N-type semiconductor

A common p-type doped for silicon is boron or _____.

There are two types of dopants,n-type dopants and p-type dopants.

The energy gap between conduction band and valence band in $\mathrm{n}-\mathrm{type}$ semiconductor is

In the energy band diagram given in figure open circles and filled circles denote hole and electrons respectively. The material is

A semiconductor has equal electron and holes concentration of $6\times {10}^8 {\mathrm{m}}^{-3}$. On doping with certain impurity, electron concentration becomes $9\times {10}^{12} {\mathrm{m}}^{-3}$. Then the semiconductor is

Electric current in extrinsic semiconductor in respect of mobility is expressed as

Electric current in extrinsic semiconductor is

The electric current in an extrinsic semiconductor is the sum of currents due to electrons and holes

In an n-type semiconductor, majority charge carriers are electrons.

If ${\mathrm{n}}_{\mathrm{e}}$ and ${\mathrm{n}}_{\mathrm{h}}$ represent the number density of electrons and holes in extrinsic semiconductor respectively then for $\mathrm{p}-\mathrm{type}$ semiconductors.

When Pentavalent atoms are added to pure semiconductor then which type of extrinsic semiconductor is found

Silicon doped with boron or gallium is a perfect example of p-type semiconductor.

In a p-type semiconductor, there is an _____ in the density of unfilled states.