Forward Biased | Working of PN junction.
Автор: Learning Science
Загружено: 2024-07-10
Просмотров: 127
Working of PN Junction
When a d.c. voltage is applied to the p type and n type regions, there is a change in the height of junction potential barrier, and the pn junction is said to be biased. If positive terminal of the battery is connected to the p type region, the height of the potential barrier reduces and the pn junction is said to be forward biased. On the other hand, a voltage of the opposite polarity increases the height of the potential barrier and the pn junction is said to be reverse biased.
Forward Biased
A pn junction is said to be forward biased if p type semiconductor is connected to the positive terminal and the n type semiconductor to the negative terminal of the external battery. The positive and negative voltages of the battery repel the holes and electrons (i.e. majority carriers) towards the junction simultaneously. If V is the forward voltage applied across the junction, the effective barrier potential is equal to (VB - V), where VB is the barrier potential in the case of an unbiased PN junction.
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