Question

What is the effect of temperature on conductivity of semiconductor?

Answer 1

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$<B>increase in temperature, number of carriers in the semiconductor material increases and which leads to increase in conductivityof the material.$So we call the semi-conductor material have negativetemperature coefficient i.e. $<i>with increase in temperature, resistance decreases.$

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Answer 2

Answer:

The electrical conductivity of semiconductors increases with increase in temperature.

Explanation:

• The solids whose conductivity lies between the metallic conductors and insulators are called semiconductors.
• The conductivity of semi-conductors have in the range from 10⁻⁶ to 10 ⁴Ω⁻¹m⁻¹. The conductivity of semiconductors due to the presence of impurities and defects.
• Semiconductors have only small difference in energy of electrons filled valence band and empty conduction band.
• If the crystal were cooled to absolute zero, the conduction band will be empty and the electrons will be occupied their lowest energy levels.
• At ordinary temperature, some electrons are thermally excited from valence band to conduction band.
• Electrical conductivity of semiconductors increase with rise in temperature because more electrons can jump from valence band to conduction band.