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In an n- type silicondiode, which of the following statement is true :
- a)Electrons are majority carriers and trivalent atoms are the dopants.
- b)Holes are majority carriers and trivalent atoms are the dopants
- c)Electrons are minority carriers and pentavalent atoms are the dopants.
- d)Holes are minority carriers and pentavalent atoms are the dopants.
Correct answer is option 'D'. Can you explain this answer?
Most Upvoted Answer
In an n- type silicondiode, which of the following statement is true :...
In an n-type silicon, the electrons are the majority carriers, while the holes are the minority carriers. An n-type semiconductor is obtained when pentavalent atoms, such as phosphorus, are doped in silicon atoms.
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In an n- type silicondiode, which of the following statement is true :...
Understanding n-Type Silicon Diodes
An n-type silicon diode is created by doping silicon with pentavalent atoms, which provide additional electrons, enhancing conductivity.
Majority and Minority Carriers
- Majority Carriers: In an n-type semiconductor, electrons are the majority carriers. This is because the process of doping adds extra electrons from the donor atoms (pentavalent).
- Minority Carriers: Holes are the minority carriers in n-type materials. They are created when electrons leave their positions in the silicon crystal lattice, leading to vacancies or "holes."
Dopants in n-Type Silicon
- Pentavalent Atoms: The dopants used for n-type silicon are pentavalent atoms, such as phosphorus or arsenic. These atoms have five valence electrons, and when they replace a silicon atom in the crystal lattice, they contribute an extra electron to the conduction band.
- Trivalent Atoms: In contrast, trivalent atoms (like boron) are used in p-type semiconductors, where they create holes by accepting electrons.
Conclusion
Therefore, the correct answer is option 'D': "Holes are minority carriers and pentavalent atoms are the dopants." This highlights that in n-type silicon, while electrons are the majority carriers contributing to conductivity, holes play a lesser role, making them minority carriers.
An n-type silicon diode is created by doping silicon with pentavalent atoms, which provide additional electrons, enhancing conductivity.
Majority and Minority Carriers
- Majority Carriers: In an n-type semiconductor, electrons are the majority carriers. This is because the process of doping adds extra electrons from the donor atoms (pentavalent).
- Minority Carriers: Holes are the minority carriers in n-type materials. They are created when electrons leave their positions in the silicon crystal lattice, leading to vacancies or "holes."
Dopants in n-Type Silicon
- Pentavalent Atoms: The dopants used for n-type silicon are pentavalent atoms, such as phosphorus or arsenic. These atoms have five valence electrons, and when they replace a silicon atom in the crystal lattice, they contribute an extra electron to the conduction band.
- Trivalent Atoms: In contrast, trivalent atoms (like boron) are used in p-type semiconductors, where they create holes by accepting electrons.
Conclusion
Therefore, the correct answer is option 'D': "Holes are minority carriers and pentavalent atoms are the dopants." This highlights that in n-type silicon, while electrons are the majority carriers contributing to conductivity, holes play a lesser role, making them minority carriers.
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