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Semiconductor Electronics: Materials, Devices and Simple Circuits

Extrinsic semiconductors

In a semiconductor, the number density of intrinsic charge car

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In a semiconductor, the number density of intrinsic charge carries at $2 7^{\circ} C$ is $1.5 \times 1 0^{16} / m^{3}$ . If the semiconductor is doped with impurity atom, the hole density increases to $4.5 \times 1 0^{22} / m^{3}$ . The electron density in the doped semiconductor is $1 0^{9} / m^{3}$

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JEE Mains 2021 July 25 Shift 2

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In a semiconductor, the number density of intrinsic charge carries at

2 7^{\circ} C

1.5 \times 1 0^{16} / m^{3}

. If the semiconductor is doped with impurity atom, the hole density increases to

4.5 \times 1 0^{22} / m^{3}

. The electron density in the doped semiconductor is

1 0^{9} / m^{3}

15 mins ago

Discuss this question LIVE

15 mins ago

Text solutionVerified

For a doped semi-conductor in thermal equilibrium

\Rightarrow n_{0} n_{n} = n_{i}^{2} n_{e} = \frac{n _{i}^{2}}{n _{h}} = \frac{( 1.5 \times 1 0 ^{16} ) ^{2}}{4.5 \times 1 0 ^{22}} = 5 \times 1 0^{9} m^{- 3}

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Question Text	In a semiconductor, the number density of intrinsic charge carries at $2 7^{\circ} C$ is $1.5 \times 1 0^{16} / m^{3}$ . If the semiconductor is doped with impurity atom, the hole density increases to $4.5 \times 1 0^{22} / m^{3}$ . The electron density in the doped semiconductor is $1 0^{9} / m^{3}$
Topic	Semiconductor Electronics: Materials, Devices and Simple Circuits
Subject	Physics
Class	Class 12
Answer Type	Text solution:1
Upvotes	40

Text solutionVerified

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