which of the following is true about the change the charge acquired by p- type semiconductors ?

Options

A. Positive
B. Neutral
C. Neagative
D. Depends on conentraton of p impurity

Explanation

To determine the charge acquired by p-type semiconductors, we need to understand the concept of doping and the behavior of charge carriers in semiconductors. Here’s a step-by-step solution:

### Step 1: Understand Doping in Semiconductors
Doping is the process of adding impurities to a semiconductor to change its electrical properties. In p-type semiconductors, trivalent elements (like boron or aluminum) are added to silicon.

**Hint:** Remember that p-type semiconductors are created by adding elements with fewer valence electrons than silicon.

### Step 2: Formation of Holes
When a trivalent atom (like boron) replaces a silicon atom in the lattice, it forms three bonds with neighboring silicon atoms but leaves one bond incomplete. This incomplete bond creates a "hole," which is essentially the absence of an electron.

**Hint:** A hole is not a positive charge; it represents a missing electron.

### Step 3: Charge Carriers in P-Type Semiconductors
In p-type semiconductors, holes act as the majority charge carriers. However, the overall charge of the semiconductor remains neutral because the number of positive holes is balanced by the negative charges of the electrons.

**Hint:** Focus on the fact that while holes are the majority carriers, the semiconductor itself is electrically neutral.

### Step 4: Conclusion on Charge Acquired
The p-type semiconductor does not acquire a net positive charge. Instead, it remains neutral, with holes being the majority carriers. The presence of holes indicates a deficiency of electrons, but this does not mean the entire semiconductor has a positive charge.

**Hint:** Remember that neutrality is maintained in the lattice despite the presence of holes.

### Final Answer
The correct statement regarding the charge acquired by p-type semiconductors is that they remain neutral, with holes acting as majority charge carriers.