Wagh Kajal Somnath posted an Question
September 18, 2021 • 15:40 pm 30 points
  • IIT JAM
  • Physics (PH)

Why the semiconductor with smallee band gap will be sensitive temperatures

why the semiconductor with smallee band gap will be sensitive temperatures

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  • Dr suman 1 best-answer

    Energy band gap is usually referred to the energy difference between the conduction band and the valence band. The conduction band is the outermost energy band where the free electrons lie and below that there is the valence band. An electron in the valence band can not move(jump) to the conduction band until and unless it is provided the amount of energy needed for the electron to cross the energy barrier between the two bands. As temperature is increased, the thermal energies of charge carriers is increased and it distorts the bond between crystals and makes bounded electrons free to move from the valence band to conduction bands as a result whole conductivity process is changed. That's why the low energy band gap material are more sensitive than high band energy gap materials

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