pn junction

single crystal by changing the dopant (impurities) from donors to acceptors during the growth of the crystal. The contact surface is called p-n junction because when you move from the contact surface in one direction, you find one type of material i.e., n-type and if you move in the opposite direction you find anot..

pn junction depletion width

. This voltage is called junction voltage or internal voltage. The potential barrier V h set up in this manner gives rise to electric field. This electric field prevents the respective majority carriers from crossing the barrier region. The potential barrier is about 0.3 V for Ge and 0.7 V for Si at room temperature (300 K). As soon as t..

depletion layer pn junction

As soon as a p-n junction is formed,electrons from the electron rich n- type material on one side of the junction diffuse into the p-type side and fill some of the holes there. At the same time, holes from the p-side diffuse into the n-type material and are filled by electrons. This exchange takes place in a n..

pn junction diode rectifier

Rectification is the process in which ac is converted into dc. The device which is used for rectification is called a rectifier. A junction diode allows a current to flow through it when it is forward biased. This property of diode is used for rectification. A half-wave rectifier is one which converts a.c. voltage into a pulsating..

reverse bias pn junction

The density or the concentration of electrons in the TV-region is For the same semiconducting material, the positions of the conduction and valence band edges do not change with doping. But the position of the Fermi level changes with both concentration and tvpe of doping. Thus for N and P regions, Therefore, Eq...

P-N Junction Diode

P-N junction is obtained by combining P-type semiconductor with a N-type semiconductor. Figure 15.16(a) shows the P-N junction. The situation within the P and N section prior to their junction is also shown in figure 15.16(a). There are excess holes in the P-section. It has to be remembered t..

forward and reverse biasing of pn junction

When the positive terminal of a d.c. source such as a battery is connected to the p-side and negative terminal to the n-side, as shown in Fig. 26.16(a) the pn junction is said to be forward biased. The battery pushes the holes from the p-side and electrons from the n-side toward the junction. If the battery..

Biasing of a p-n junction

B. Inside the p-n junction the electrons flow from the end B to the end A of the semiconductor. The electron flows through the whole circuit and a current called forward current flows through the circuit. Inside the p-n junction the current flow is due to both the electrons and holes. But in the ex..

biasing of the p-n junction

. But a transistor conducts cither way. 52. Truth-table ofNAND gate : A B Y 0 0 1 0 1 1 1 0 1 1 1 0 53. Truth table of an AND gate A B Y = A.B 0 0 0 1 0 0 0 1 1 1 0 1 54. Depletion region in a p-/i-junction..

Biasing of a p-n junction

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