SOLUTION

• A PN junction is said to be formed only when a bonding force is created between p-type and n-type semiconductors.
• Ionization within a P-N junction causes a layer on each side of the barrier called the depletion layer.
• The depletion layer is also called the “space charge region” or “transition region”.
• The depletion layer is created due to the diffusion of majority carriers across the junction.
• In the depletion layer, mobile charge carriers (electrons and holes) are zero.
• The depletion layer consists of ions and covalent bonds.
• The depletion layer consists of immobile charged particles.
• The depletion layer consists of negative and positive charges (ions) on either side of the junction.
• The depletion layer consists of negative ions (acceptor ions) on the p-side and positive ions (donor ions) on the n-side.
• The depletion layer opposes majority carriers in crossing the junction.
• The depletion layer does not oppose minority carriers in crossing the junction.