Question
Question: A semiconductor has equal electron and hole concentration of \(6 \times 10^{8}\) per \(m^{3}\) on do...
A semiconductor has equal electron and hole concentration of 6×108 per m3 on doping with certain impurity, electron concentration increases to 9×1012perm3 The new hole concentration is
A
2×104per m3
B
2×102 per m2
C
4×104 per m3
D
4×102per m3
Answer
4×104 per m3
Explanation
Solution
: As nenh=ni2
Here, ni=6×108perm3and ne=9×1012perm3
∴nh=neni=9×1012(6×108)2=4×104perm3