MOSFET parameter dependence on temperature

[PRASAN DUTT RAJU]

In FET as the temperature increases its mobility decreases. Why?

As far I know as the temperature increases more electrons are getting generated resulting in population inversion & thus electron mobility increases but recently I came across FET in which just the opposite phenomena occurs. Why?

 

[ohenri100]

I dont agree with you. What document you read about this?

 

[PRASAN DUTT RAJU]

I got this problem when solving a sample paper I found someone from internet. May be I could wrong, please clarify what is temperature effect on FET.

 

[ohenri100]

Dear,
As temperature increases, lattice vibrations increase and the probability of an electron being scattered by the lattice increases; thus, high temperature mobilities are limited by phonon scattering causing mobility to decrease as temperature increases.


Read: **broken link removed**
Best regard.