- #1
jinyong
- 20
- 0
For a PN junction diode, the total potential across the semiconductor equals the built-in potential minus the applied voltage.
Phi = Phi(built-in)-Va(voltage applied)
My question is what happens when the Va exceeds the Phi(built-in)? Will the Phi = negative? But how come they always assume drop of 0.7V for diodes.
Phi = Phi(built-in)-Va(voltage applied)
My question is what happens when the Va exceeds the Phi(built-in)? Will the Phi = negative? But how come they always assume drop of 0.7V for diodes.