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A zener diode has a contract potential o...

A zener diode has a contract potential of `0.8 V` in the absence of biasing. It undergoes zener breakdown for an electric field of `10^(6) Vm^(-1)` at the depletion region of p-n junction. If the width of the depletion region is 2-4mu m, what should be the reverse biased potential for the zener breakdown to occur?

Text Solution

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Here, the breakdown electric field of the zener diode, `E=10^(6)Vm^(-1)`.
The width of the depletion region,
`d=2.4xx10^(-6)m`
`:. V_(Breakdown)=Exxd=10^(6)xx2.4xx10^(-6)`
`=2.4V`
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