Potential barrier, Physics

Potential barrier

One either side of the junction, the region ‘D' becomes free from mobile charge carriers. That is on n-type side of D, no free electrons exist and on p-type side of D no holes exist. In the region ‘D' only immobile donor and acceptor ions exist.

 

283_potential barrier.png

Since on either side of junction J, stationary positive and negative charges exist, there is an electric potential difference VD between the edges 1 and 2 of D. This potential difference (VD) across the junction is called ‘Potential barrier' as it prevents further movement of holes and electrons. This combination described in figure becomes a p-n junction diode.

 

Posted Date: 8/29/2012 1:49:52 AM | Location : United States







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