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Explain term 'depletion layer' across a p-n junction
Rectifying action of p-n diode can be explained on the foundation of electronic structure of the semiconductor. When a pure semiconductor is doped to become n-type, Fermi level shifts up from the middle of the energy gap towards donor level. This is so because position corresponding to 505 probability of occupation moves up because of the relatively high concentration of donor electrons in conduction band. If crystal is p-type, Fermi level shifts down towards the acceptor level. When same crystal is doped to become ntype on one side and p-type on the other side, Fermi level has to be constant throughout the crystal in thermal equilibrium. This results in electron energy levels at the bottom of the conduction band in n-part to be lower than those in the p-part, by an amount equal to contact potential eVo as demonstrated in Fig a. Contact potential at the junction gives rise to energy barrier or depletion layer.
what are the assumpions made in valence bond theory
A chemical transport barge routinely carries chemicals across Lake Futura. In an unfortunate incident the chemical transport barge, carrying a solution of phenol in synthetic oil,
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electronic cofiguration of f-block elements
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is (NH4)2S react with HNO3?
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what is the volume in cubic of a brain that is 4.77-10 to the -3 power.
can we reduce r-cn to primary ammines using fe/hcl
Chemical Properties Proteins - Salt formation (i) Salt formation : Due to existence of both -NH 2 and -COOH groups in proteins, they make salts along with acids and bases.
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