If the temperature of a pn junction is doubled, by what factor does the depletion region width change under equilibrium conditions(to first order anyway)?

A. The depletion region width decreases by a factor of sqrt(2)

B. The depletion region width increases by a factor of 2

C. The depletion region width increases by a factor of sqrt(2)

D. The depletion region width decreases by a factor of 2

E. The depletion region width is independent of temperature.

#### Top Answer

A. The depletion region width... View the full answer

- how?
- Damfu
- Oct 20, 2016 at 1:11pm

- The depletion width is given by: W=[Constant*(Vo-V)/q]^1/2, Here, Vo is barrier voltage which is temperature dependent and its value decreases by 2 mV/C. So, Vo is inversely proportional to temperature which means W is inversely proportional to T by factor of square root as mentioned in above equation. Reference Electronic Devices and Circuits By Salivahanan
- sunny00000000
- Oct 20, 2016 at 1:20pm

- Got it?
- sunny00000000
- Oct 20, 2016 at 1:51pm

- Ya, thanks
- Damfu
- Oct 20, 2016 at 2:10pm