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![[Post New]](/templates/default/images/icon_minipost_new.gif) 17 Jan 2008 10:59:15 IST
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what is a p type semi conductor and ntype semi conductor pls explain how these conductors
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17 Jan 2008 10:59:55 IST
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how these conductors conduct electricity with a diagram
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17 Jan 2008 11:11:11 IST
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Doping a semiconductor such as silicon with a small amount of impurity atoms, such as phosphorus or boron, greatly increases the number of free electrons or holes within the semiconductor. When a doped semiconductor contains excess holes it is called "p-type", and when it contains excess free electrons it is known as "n-type", where p (positive for holes) or n (negative for electrons) is the sign of the charge of the majority mobile charge carriers. The junctions which form where n-type and p-type semiconductors join together are called p-n junctions
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it is not important where u stand, but in which direction u are moving |
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17 Jan 2008 13:12:11 IST
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An N-type semiconductor (N for Negative) is obtained by carrying out a process of doping, that is, by adding an impurity of valence -five elements to a valence-four semiconductor in order to increase the number of free (in this case negative) charge carriers.
A P-type semiconductor (P for Positive) is obtained by adding a certain type of atoms to the semiconductor in order to increase the number of free (in this case positive) charge carriers.
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