drift current is also there under forward bias but it is negligible ( ) A) when compared with current due to injected carriers which is usually in mA. The diode reverse current is not very much dependent on the applied voltage. Even a small voltage is sufficient to sweep the minority carriers from one side of the junction to the other side of the junction. The current FIGURE .
(a) p-n junction diode under forward bias, (b) Barrier potential ( ) without battery, ( ) Low battery voltage, and ( ) High voltage battery. FIGURE . Forward bias minority carrier injection.