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Engineering Physics by S. Mani Naidu

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8.13 Energy band diagram of p-n diode

The band diagram of isolated p-type and n-type materials are shown in Figs. 8.18(a) and (b)

 

Figure 8.18 (a) Band diagram of p-type material

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Figure 8.18 (b) Band diagram of n-type material

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The Fermi level lies close to the conduction band in n-type material and it is close to valence band in p-type material. When a p-n diode is made with p-type and n-type materials, then flow of free charge carriers takes place at the junction. As the charge carriers flow from one side of the junction to the other side, ...

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