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p n Junction

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Free electrons Free holes p-n Junction When a p-type semiconductor and an n-type semiconductor come into contact with each other they form what is called a p-n junction N type Conduction band Junction P type Valence band Free electrons Free holes p-n Junction Similarly, holes from the ptype semiconductor are able to move across the junction allowing for an electron to fall into it Free electrons in the conduction band in the n-type semiconductor are initially able to move across the j
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  ValencebandConductionband p-n Junction When a p-type semiconductor and an n-type semiconductor comeinto contact with each other they form what is called a p-n junctionN type P type Junction Free electrons Free holes  p-n Junction N type P type ConductionbandValenceband Junction Free electrons Free holes Free electrons in the conductionband in the n-type semiconductorare initially able to move across the  junction and “drop into” a free hole in the p-type semiconductorSimilarly, holes from the p-type semiconductor are ableto move across the junctionallowing for an electron tofall into it This means that in terms of charges, the hole and electron cancel each other out and disappear   p-n Junction N type P type ConductionbandValenceband Junction Free electrons Free holes As a result electrons and holes near the junction tend tocancel each other out, producing a region depleted of movingcharges  – this creates what is known as a the depletion zone Depletion zone

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