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physics.cie
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I want to know ... what happens to silicon when some impurity is added to it.
Where does silicon goes??
Where does silicon goes??
physics.cie said:U mean that silicon atom is now free to move in the lattice? ?
Doping with impurities in Silicon is the process of intentionally adding small amounts of atoms from other elements to the Silicon crystal lattice in order to alter its electrical properties.
Doping with impurities is done in Silicon to create either p-type or n-type semiconductors, which have different electrical properties and are used in electronic devices such as transistors and diodes.
The most common impurities used in doping Silicon are boron, phosphorus, arsenic, and antimony. These elements are chosen because they have one extra or one less valence electron than Silicon, allowing them to create either p-type or n-type semiconductors.
Doping with impurities increases the conductivity of Silicon. In p-type semiconductors, the addition of impurities creates holes, which act as positive charge carriers. In n-type semiconductors, the impurities create free electrons, which act as negative charge carriers.
Doping with impurities can be reversed by using a process called annealing, which involves heating the doped Silicon to a high temperature. This helps redistribute the impurities and restore the original electrical properties of the Silicon crystal.