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प्रश्न
Why does the electrical conductivity of semiconductors increase with rise in temperature?
उत्तर
The gap between conduction band and valence band is small in semiconductors (Figure), therefore, some electrons from the valence band can jump to the conduction band and show some conductivity band. With rise in temperature more electrons can jump to the conduction band. Thus, electrical conductivity of semiconductors increases with rise in temperature.
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संबंधित प्रश्न
A group 14 element is to be converted into n-type semiconductor by doping it with a suitable impurity. To which group should this impurity belong?
What is a semiconductor
Describe the two main types of semiconductors and contrast their conduction mechanism.
Classify the following as being either a p-type or an n-type semiconductor:
B doped with Si.
What type of semiconductor is obtained when
Ge is doped with In?
The process by which impurity is introduced in semiconductors to enhance its conductivity is known as ____________.
Electrical conductivity of semiconductors increases with increase in ____________.
Which of the following statements are true about semiconductors?
(i) Silicon doped with electron-rich impurity is a p-type semiconductor.
(ii) Silicon doped with an electron-rich impurity is an n-type semiconductor.
(iii) Delocalised electrons increase the conductivity of doped silicon.
(iv) An electron vacancy increases the conductivity of n-type semiconductor.
Why are solids incompressible?
Silicon is a/an ______
