Electronic Devices Question 93

Question: A Ge specimen is doped with Al. The concentration of acceptor atoms is ~1021 atoms/m3. Given that the intrinsic concentration of electron hole pairs is  ~1019/m3 , the concentration of electrons in the specimen is

[AIIMS 2004]

Options:

A) 1017/m3

B) 1015/m3

C) 104/m3

D) 102/m3

Show Answer

Answer:

Correct Answer: A

Solution:

ni2=nhne

Therefore (1019)2=1021×ne

Therefore ne=1017/m3.



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