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Results tagged with semiconductors
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user 311314
Most generally a class of materials that are neither insulators or conductors in their natural state, but which can be manipulated via doping or electric fields to change their conduction state. Silicon, Germanium, and GaAs are some usual materials. The term is also used to speak about devices that are made from such materials, for example, a processor from Intel can be called a semiconductor.
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Hole current in p-type semiconductors
I know about p-type semiconductors and that there are holes as majority carriers present in the semiconduction. …
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Is generation and recombination same in extrinsic semiconductors?
For example, if we have an n - type semiconductor, so there are more electrons in the conduction band. So wouldn´t the recombination rate increase, opposed to the generation rate, because there are mo …
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Do holes in a semiconductor just move when there is a current going through the semiconductor?
If a current travels through a semiconductor holes travel to the "end" of a semiconductor, where they can recombine with incoming electrons. Does this also occur if there is no current flowing through …
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Why do we dope low amount of impurity atoms in a semiconductor?
I read that the doping ratio is usually around 1 impurity/10 million atoms. Why is that ratio so low? Can’t the semiconductor conduct electricity better if there were more charge carriers?
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Why is intrinsic carrier density only equal to hole - or electron concentration?
If carriers can be holes or free electrons, why isn´t the intrinsic carrier concentration equal to the sum of the free electron concentration and the hole concentration in the semiconductor?
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Do conduction electrons recombine with positive donor atoms?
Once the 5th valence electron of a donor atom left, it will be to the conduction band, so the donor atom becomes positively charged.
My question is if it is possible, that a free electron from the con …