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Semiconductor Electronics : Materials Devices and Simple Circuits — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsSemiconductor Electronics : Materials Devices and Simple Circuits4 Marks
Question
Mention the difference between $n$-type and $p$-type semiconductors.
✓

Answer

Difference betwen $n$-type and $p$-type semiconductors
$n$-type Semiconductor$p$-type Semiconductor
1. It is an extrinsic semicon-ductor obtained by adding a pentavalent impurity to a pure intrinsic semi-conductor.It is also an extrinsic semi-conductor obtained by adding a trivalent impurity to a pure intrinsic semiconductor.
2. The impurity atoms added provide extra free electrons to the crystal lattice and are called donor atoms.The impurity atoms added create holes in the crystal lattice and are called acceptor atoms because the created holes accept electrons.
3. The electrons are majority carriers and the holes are minority carriers.The holes are majority carriers and the electrons are mino-rity carriers.
4. The electron concentration is much more than the hole concentration $\left(n_e \gg n_h\right)$.The hole concentration is much more than the electron concentration $\left(n_h \gg n_e\right)$.

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