Explain why FeO shows p-type semiconductivity when heated.
Answers
Answer:
FeO shows p-type semiconductivity when heated.
Explanation:
When a pure semiconductor exists heated, its resistance decreases. When the temperature exists increases, some covalent bonds in the semiconductor break due to the thermal energy provided. The breaking of the bond formed those electrons free which are engaged in the construction of these bonds.
FeO crystal lattice can be regarded as a positive hole. Consequently, under the influence of an electric field, the positive holes can move from Fe3+ ions to Fe2+ ions, thereby producing electrical conductivity. Therefore, such non-stoichiometric crystals act as p-type semiconductors.
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Answer:
FeO shows p-type semiconductivity when heated as the gap between conduction band and valence band is very small.
Explanation:
Given: FeO compound is given
To Find: Why Feo shows p type semiconductivity when heated.
Step Wise Solution: We know that conductivity is inversely propotional to resistance so when a substance is heated its resistance deceases with increase in temperature, this is because of the face increase in temperature results in breaking of covalent bonds between Fe and O due to which electrons from valence band which is already filled move to the conduction band as with increase in tempertature the forbidden gap between two bands that is valence band and conduction band become very less thus allowing electrons to move in structure so conductivity of substance increases.
Another reason that best describes the semiconductivity of FeO is that FeO crystal lattice can is a positive holeand under the influence of an electric field(temperature), the positive holes can move from Fe^3+ ions to Fe^2+ ions, thereby produce electrical conductivity. Hence, such non-stoichiometric crystals act as p-type semiconductors when heated.
Code: SPJ2