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प्रश्न
Name the two types of atoms used for doping of Ge/Si.
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उत्तर
Doping increases the conductivity of a semiconductor.
For doping pure Si, Ge, and pentavalent phosphorus is used to convert it to the n-type semiconductor.
Trivalent aluminium is used to convert pure Si, and Ge to the p-type semiconductor.
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संबंधित प्रश्न
Let np and ne be the numbers of holes and conduction electrons in an extrinsic semiconductor.
Explain the following term:
Intrinsic semiconductor
Two crystals C1 and C2, made of pure silicon, are doped with arsenic and aluminium respectively.
Why is doping of intrinsic semiconductors necessary?
Answer the following giving reasons:
Impurities are added to intrinsic semiconductors.
What happens when some valence electrons gain enough energy as temperature increases?
What must electrons cross to become free charge carriers as the temperature rises?
How does the conductivity of an intrinsic semiconductor compare with that of an extrinsic semiconductor?
Which statement about the lattice structure of carbon, silicon, and germanium is correct?
What does a classroom in which every student is seated represent in the description of a semiconductor at very low temperature?
Why are pure semiconductors not usually used directly in most electronic devices?
