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Explain with the help of a diagram, how a depletion layer and barrier potential are formed in a junction diode. |
Answer» Solution : Due to the diffusion of ELECTRONS and the holes, from their MAJORITY zone to minority zone, a layer of positive and negative SPACE charge region on either side on the junction is formed. This is called the depletion region. The loss of electrons, from n-region and gain of electrons by the p-region, causes a difference of potential across the junction. This tends to prevent the movement of charge CARRIER across the junction and is, therefore, TERMED as barrier potential. |
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