Which of the following is heavily doped?

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(D) $Zener$ diode is specifically designed to operate in the reverse breakdown region. To achieve a sharp breakdown voltage,the depletion layer must b

Vedclass · Accepted Answer

$c$ only

Vedclass · Answer

(D) $Zener$ diode is specifically designed to operate in the reverse breakdown region. To achieve a sharp breakdown voltage,the depletion layer must be very thin,which is accomplished by heavy doping of both the $p$-type and $n$-type regions. In contrast,photodiodes,$LEDs$,and solar cells are typically moderately doped to optimize their light-sensitive or light-emitting characteristics. Therefore,the correct answer is $(c)$ only.

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