Which of the following given statement for semiconductor is correct?

Options

A. p-type semiconductor is formed by doping Si with B
B. p-type semiconductor is formed by doping Si with P
C. n-type semiconductor is formed by doping Si with Al
D. n-type semiconductor is formed by doping Ge with B

Answer

To determine the correct statement regarding semiconductors, let's analyze each option step by step.

### Step 1: Understand p-type and n-type semiconductors
- **p-type semiconductor**: This type is formed by doping a semiconductor (like silicon) with elements from Group 13 of the periodic table (e.g., boron, aluminum, gallium). These elements have fewer valence electrons (3) compared to silicon (4), creating "holes" that carry positive charge.
- **n-type semiconductor**: This type is formed by doping a semiconductor with elements from Group 15 (e.g., phosphorus, arsenic). These elements have more valence electrons (5) than silicon, providing extra electrons that carry negative charge.

### Step 2: Analyze the statements
1. **Statement 1**: "p-type semiconductor is formed by doping silicon with bromine."
- **Analysis**: This statement is incorrect. p-type semiconductors are formed by doping silicon with elements like boron, not bromine. Bromine is not a Group 13 element.

2. **Statement 2**: "p-type semiconductor is formed by doping silicon with phosphorus."
- **Analysis**: This statement is also incorrect. Phosphorus is a Group 15 element and is used to create n-type semiconductors, not p-type.

3. **Statement 3**: "n-type semiconductor is formed by doping silicon with aluminum."
- **Analysis**: This statement is incorrect. Aluminum is a Group 13 element and is used to create p-type semiconductors, not n-type.

4. **Statement 4**: "n-type semiconductor is formed by doping silicon with phosphorus."
- **Analysis**: This statement is correct. Phosphorus is a Group 15 element and is used to create n-type semiconductors by providing extra electrons.

### Conclusion
The correct statement regarding semiconductors is that n-type semiconductor is formed by doping silicon with phosphorus.

### Final Answer
**The correct statement is: "n-type semiconductor is formed by doping silicon with phosphorus."**