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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
In an intrinsic semiconductor the energy gap Egis 1.2 eV. Its hole mobility is much smaller than electron mobility and independent of temperature. What is the ratio between conductivity at 600K and that at 300K? Assume that the temperature dependence of intrinsic carrier concentration niis given by
`"n"_"i" = "n"_0 exp(- "E"_"g"/(2"k"_"BT"))`
where n0 is a constant.
Let np and ne be the numbers of holes and conduction electrons in an extrinsic semiconductor.
Answer in detail.
Distinguish between intrinsic semiconductors and extrinsic semiconductors.
Let nh and ne be the number of holes and conduction electrons respectively in a semiconductor. Then ______.
In a semiconductor, the number of holes and number of free electrons are represented as 'nh' and 'ne' respectively. Which one of the following statements is TRUE for the semiconductor?
Explain the following term:
Intrinsic semiconductor
An intrinsic semiconductor has a resistivity of 0.50 Ω m at room temperature. Find the intrinsic carrier concentration if the mobilities of electrons and holes are 0.39 m2V-1S-1 and O.11 m2 v-1S-1 respectively:
Hole is ______.
What is meant by doping of an intrinsic semiconductor?
Answer the following giving reasons:
Impurities are added to intrinsic semiconductors.
