The potential barrier existing across an unbiased p-n junction is 0.2 volt. What minimum kinetic energy a hole should have to diffuse
The potential barrier existing across an unbiased p-n junction is 0.2 volt. What minimum kinetic energy a hole should have to diffuse from the p-side to the n-side if (a) the junction is unbiased, (b) the junction is forward-biased at 0.1 volt and (c) the junction is reverse-biased at 0.1 volt?
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Potential barrier = 0.2 Volt
a) K.E. = (Potential difference) x e = 0.2 eV (in unbiased condn)
b) In forward biasing
KE + Ve = 0.2e
=> KE = 0.2e – 0.1e = 0.1e.
c) In reverse biasing
KE – Ve = 0.2 e
=> KE = 0.2e + 0.1e = 0.3e.
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