Electronic Devices - Semiconductors - Discussion

Discussion Forum : Semiconductors - General Questions (Q.No. 9)
9.
An n-type semiconductor material
is intrinsic.
has trivalent impurity atoms added.
has pentavalent impurity atoms added.
requires no doping.
Answer: Option
Explanation:

N-type Semiconductor :

An intrinsic semiconductor material is a poor conductor. When a small amount of pentavalent impurity is added to the intrinsic material its conductivity rises sharply. This material formed after the addition of pentavalent impurity to the intrinsic semiconductor material is called N-type material. Addition of small amount of pentavalent atoms in the intrinsic material provides large number of free electrons for conduction.

Discussion:
7 comments Page 1 of 1.

Sudhee said:   1 decade ago
Intrinsic semiconductors are pure semiconductors. The process of adding impurity to the pure form of semiconductor is called doping and the semiconductor thus obtained is called extrinsic semiconductors. Pentavalent impurity produce n- type and trivalent produce p- type semiconductors.

Srishti said:   1 decade ago
N-type Semiconductor :

An intrinsic semiconductor material is a poor conductor and is pure semiconductor. When a small amount of impurity, either trivalent or pentavalent, is added/ doped into the intrinsic material its conductivity rises sharply.

N-type material formed after the addition of pentavalent impurity to the intrinsic semiconductor material is called N-type material. Addition of small amount of pentavalent atoms in the intrinsic material provides large number of free electrons for conduction.

ROHAN said:   1 decade ago
If doping increases the conductivity then why it is called ADDING OF IMPURITIES.

Bharat said:   1 decade ago
N type semiconductor is a lower conductor. When a pentavalent impurity add in n type semiconductor than it generate a free electron. So it is use for conduct.

Siidu said:   1 decade ago
n-type means it is a intrinsic semiconductor first of all...

Lavanya said:   1 decade ago
N-type semiconductor (extrinsic/impure semiconductor) fermi energy level in near to the conducting bond.

Tribhuwan said:   1 decade ago
Adding pentavalent impurity makes access of electrons within the semiconductor and thus calling it n type.

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