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Donor atom |
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Donor atom An impurity atom in a semiconductor which can contribute or donate one or more conduction electrons to the crystal by becoming ionized and positively charged. For example, an atom of column 5 of the periodic table substituting for a regular atom of a germanium or silicon crystal is a donor because it has one or more valence electrons which can be detached and added to the conduction band of the crystal. Donor atoms thus tend to increase the number of conduction electrons in the semiconductor. The ionization energy of a donor atom is the energy required to dissociate the electron from the atom and put it in the conduction band of the crystal. See Acceptor atom, Semiconductor How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| ? Mentioned in | ? References in periodicals archive | ||
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| In these equations, the X refers to the donor atom in the repulsive stage and to the hydrogen atom in the attractive stage (Fig. H-D, where A is an acceptor atom, D is a donor atom, B is an atom immediately bonded to A, and H is a hydrogen atom. |
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