Question

Which defect creates when some Phosphorus atom added to Silicon displacement effect metal deficiency defect electron affects metal excess defect

Answer 1

Dear student,

Metal excess defect defines as a defect creates when there is anionic deficiency and metal deficiency defect creates when there is cationic deficiency.
In case of silicon it has valency 4 and phosphorous has valency 5 so, when silicon is replaced by phosphorous then the number of anions increases in the compound which corresponds to the metal deficiency defect.

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