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प्रश्न
Draw energy band diagrams of an n-type and p-type semiconductor at temperature T > 0 K. Mark the donor and acceptor energy levels with their energies.
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उत्तर
संबंधित प्रश्न
Distinguish between a metal and an insulator on the basis of energy band diagrams ?
Let np and ne be the number of holes and conduction electrons in an intrinsic semiconductor.
Let ΔE denote the energy gap between the valence band and the conduction band. The population of conduction electrons (and of the holes) is roughly proportional to e−ΔE/2kT. Find the ratio of the concentration of conduction electrons in diamond to the in silicon at room temperature 300 K. ΔE for silicon is 1.1 eV and for diamond is 6.1 eV. How many conduction electrons are likely to be in one cubic metre of diamond?
Hydrogen atom in n = 3 state has a lifetime of 10-10 sec. The number of revolutions an electron makes in the n = 3 state before returning to the ground state is ______.
Useful data
`1/(4pi∈_0) = 8.99 xx 10^-34`N m2 C-2; e = 1.60 10-19 C; h = 6.63 10-34 Js; me = 9 × 10-3 kg
A window air conditioner is placed on a table inside a well-insulated apartment, plugged in and turned on. What happens to the average temperature of the apartment?
Two radioactive substances A and B have decay constants 3λ and λ respectively. At t = 0 they have the same number of nuclei. The ratio of the number of nuclei of A to those of B will be `1/"e"` after a time interval:
The valance of an impurity added to germanium crystal in order to convert it into p-type semiconductor is
Hole are majority charge carrier in
The energy required by an electron to jump the forbidden band in silicon at room temperature is about ______.
With reference to semiconductor physics, answer the following question.
In which material “Forbidden band” is absent?
