Electronic Devices - Semiconductors - Discussion
Discussion Forum : Semiconductors - General Questions (Q.No. 10)
10.
For a forward-biased diode, as temperature is ________, the forward current ________ for a given value of forward voltage.
Discussion:
17 comments Page 1 of 2.
Isac said:
4 years ago
If temperature increases then the depletion layer decreases.
If the temperature increases depletion region decreases then current increases.
If the temperature increases depletion region decreases then current increases.
(1)
Abic said:
7 years ago
Thanks all.
Ahmed said:
7 years ago
Thanks for the answer.
Dirisala said:
8 years ago
If the temperature increases the resistance decreases. Thus, the current increases.
Harsha vardhan said:
1 decade ago
If temperature increases the width of potential barrier decreases there by decrease in the width of depletion layer.
That is the electrons get energy and crosses the depletion layer within in a short time. Hence the current increases(the flow of electrons has increased).
That is the electrons get energy and crosses the depletion layer within in a short time. Hence the current increases(the flow of electrons has increased).
NITESH KUMAR said:
1 decade ago
I know that increase temp current increases but but at a certain temp that will become constant. Then how to say on increases temp current will be also increases.
Gopal said:
1 decade ago
I=i(exp(v/k*T)-1), and i=reverse saturation current directly proportional to minority carrier conc. intern square of (intrinsic carier conc.).
Therefore exp(-Eg/k*T) increases with increase in temparature. Hence I increase with temperature...
Therefore exp(-Eg/k*T) increases with increase in temparature. Hence I increase with temperature...
Bheemreddy said:
1 decade ago
Due to increase of temp the minority current increase but not majority so it value is decrease by 2.5mv/degree so forward voltage decreases by increase of temp.
Anirban said:
1 decade ago
The explanation may be done in this way also. We know that as temp increases the reverse saturation current also increases. The forward biased current of diode is proportional to the reverse sat current. So forward biased current increases with temp.
Peyush said:
1 decade ago
With increase in temperature forward current increases because increased temperature increases the dopand impurities in respective p- and n-types.
With decrease in temperature forward current decreases very little but not that much because the external voltage keeps the flow of current through the diode.
With decrease in temperature forward current decreases very little but not that much because the external voltage keeps the flow of current through the diode.
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