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  • Please help! If the lattice constant of this semiconductor is decreased, then which of the following is correct?

If the lattice constant of this semiconductor is decreased, then which of the following is correct?

  • Option 1)

    all E_c,E_g, E_v  decrease

  • Option 2)

    all E_c,E_g, E_v  increase

  • Option 3)

    E_c,\, \, and\, \, E_v\, \, increase,but\, E_g\, \, decreases

  • Option 4)

    E_c,\, \, and\, \, E_v\, \, decrease,but\, E_g\, \, increases

 

Answers (1)

best_answer

As we have learnt,

 

Number of electrons or holes -

n_{e}= n_{\lambda }= AT^{3/2}e^{-Eg /2KT}
 

- wherein

Eg = Energy gap

K = Boltzmann Constant

T = Temperature in kelvin

On increasing temperature,  the number of current carried increases

 

 As lattice constant of semiconductor decreases, then Ec and Ev decrease but Eg increases

 

 


Option 1)

all E_c,E_g, E_v  decrease

Option 2)

all E_c,E_g, E_v  increase

Option 3)

E_c,\, \, and\, \, E_v\, \, increase,but\, E_g\, \, decreases

Option 4)

E_c,\, \, and\, \, E_v\, \, decrease,but\, E_g\, \, increases

Posted by

Avinash

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