Physics · Semiconductors, semiconductor diode: I-V characteristics in forward and reverse bias, diode as a rectifier
In a semiconductor, which of the following statement is correct?
In a semiconductor, which of the following statement is correct?
- A. At \( 0 K \), Si is a super conductor.
- B. In a p-type semiconductor the acceptor level lies near the conduction band.
- C. Each donor atom contributes one hole.
- D. \( p-n \) junction is electrically neutral
Step-by-step solution
A p-n junction as a whole is electrically neutral. The p-side and n-side have equal numbers of positive and negative charges, resulting in no net charge. The depletion region has a net charge, but overall the device is neutral. Options A, B, and C are false: Si at 0K is an insulator, acceptor levels lie near the valence band, and donor atoms contribute electrons, not holes.