- #1
xunrichard
- 3
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As we are told in the books,a diode can be conductive by a forward-bias of about 0.7v.
Thus,current through the n region is formed by the conduction electrons(free electrons in the conduction band) toward the junction.But in the p region,current is formed by the valence electrons from holes to holes toward the positive side of the power source.Obviously,the conduction electrons from the n region can easily become the valence electrons in the p region and the valence electrons in the p region can easily become conduction electrons so they can move into the copper cord(as we suggest)which is between the positive side of the power source and the p region.
So here is the question:why a diode can not be conductive by a reverse-bias voltage?
Can the conduction electrons in the copper cord move into the p region? If not,why?
Thus,current through the n region is formed by the conduction electrons(free electrons in the conduction band) toward the junction.But in the p region,current is formed by the valence electrons from holes to holes toward the positive side of the power source.Obviously,the conduction electrons from the n region can easily become the valence electrons in the p region and the valence electrons in the p region can easily become conduction electrons so they can move into the copper cord(as we suggest)which is between the positive side of the power source and the p region.
So here is the question:why a diode can not be conductive by a reverse-bias voltage?
Can the conduction electrons in the copper cord move into the p region? If not,why?