Why are n-type and p-type semiconductor electrically neutral?
Asked by Topperlearning User | 4th Jun, 2014, 01:23: PM
Expert Answer:
When a pentavalent impurity atom is added to a pure semiconductor to make it n-type semiconductor, it donates one free electron to the crystal, leaving a positive charge on the donor atom, the donated electron remains in the crystal in free state. As the charge on the donor ion is equal and opposite to the charge of the electron, the crystal itself remains electrically neutral. With the same reasoning, p-type semiconductor is also electrically neutral.
Answered by | 4th Jun, 2014, 03:23: PM
- Why do conductors not form holes?
- How does the addition of trivalent impurity to a pure semiconductor affect the electron hole pairs at room temperature?
- For the same degree of doping, why is the conductivity of n-type semiconductor greater than that of p-type semiconductor?
- Why is a semiconductor virtually an insulator at room temperature?
- Why are germanium and silicon preferred to other semiconductors in solid state devices?
- Why do hole carriers present in n-type semiconductor?
- Why is the amount of impurity added to a pure semiconductor closely controlled?
- The hole current is due to the movement of valence electrons from one covalent bond to another. Why is then the name hole current?
- Which of the one between silicon and germanium preferred in the manufacturing of semiconductor devices? Why?
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