Does temperature affect the static characteristic of diode?

Question

If yes, tell the static diode characteristic in the case of the right polarization in two different temperatures. If not, tell the physical reasoning

Answer 1

Hii,

Yes, temperature affects the static characteristics of a diode.

In the case of forward bias (right polarization), the diode's current-voltage (I-V) characteristic changes with temperature. When temperature increases, the threshold voltage (cut-in voltage) of the diode decreases, and for the same applied voltage, the forward current increases. This happens because the intrinsic carrier concentration in the semiconductor increases with temperature, reducing the barrier potential of the junction.

For example, at room temperature (around 25°C), a silicon diode typically has a threshold voltage of about 0.7V. If the temperature rises to 75°C, the threshold voltage may drop to around 0.6V. The forward current at a given voltage increases significantly due to the exponential dependence of the diode equation on temperature.

Thus, in forward bias, a diode conducts more current at a given voltage when the temperature is higher.