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(A) In an $N$-type semiconductor,pentavalent impurity atoms are added to a pure semiconductor (like $Si$ or $Ge$).These impurity atoms provide extra e

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The donor level lies closely below the bottom of the conduction band.

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(A) In an $N$-type semiconductor,pentavalent impurity atoms are added to a pure semiconductor (like $Si$ or $Ge$).These impurity atoms provide extra electrons to the conduction band.The energy levels of these donor electrons are called donor energy levels $(E_d)$.These donor energy levels are located just below the conduction band $(E_c)$,typically at a distance of about $0.01 \ eV$ for $Ge$ and $0.05 \ eV$ for $Si$.Therefore,the donor level lies closely below the bottom of the conduction band.

Which of the following statements is true for an $N$-type semiconductor?

Similar Questions

The number of silicon atoms per $m^3$ is $5 \times 10^{28}$. This is doped with $4.5 \times 10^{21}$ atoms $/ m^3$ of Arsenic. The ratio of the number of electrons to the number of holes after doping is (Take $n_i = 1.5 \times 10^{16} / m^3$)

$A$ pure $Si$ crystal has $5 \times 10^{28}$ atoms $m^{-3}$. It is doped with $1 \, ppm$ concentration of pentavalent $As$. The number of holes is (Take $n_i = 1.5 \times 10^{16} \, m^{-3}$)

Which of the following statements is incorrect?

When arsenic is added as an impurity to silicon,the resulting material is

If the number of holes and electrons are represented by $n_h$ and $n_e$ respectively,then which of the following is correct for an intrinsic semiconductor?

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