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What is meant by 0.3 volts for germanium and 0.7 volts for silicon?
Wiki User
∙ 15y ago
== When we make a semiconductor junction (a p-n junction), the electric fields force charges to shift creating what is called a depletion region. This depletion region forms a potential barrier across the junction. This potential barrier has a voltage associated with it, and that voltage is 0.3 volts (approximately) for germanium semiconductor material, and 0.7 volts (approximately) for silicon semiconductor. The terms we apply to this barrier potential are the built-in voltage (or potential), junction voltage (or potential), and contact potential. Use the link below to check facts and review some other closely related material.
Wiki User
∙ 15y ago
This refers to the forward voltage drop across a diode made from germanium or silicon. It signifies the voltage level at which the diode starts conducting electricity in the forward direction. Germanium diodes typically have a forward voltage drop of around 0.3 volts, while silicon diodes have a slightly higher drop at around 0.7 volts.
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3
