This potential difference is called built-in potential. After joining p-type and n-type semiconductors, electrons from the n region near the pân interface tend to diffuse into the p region. As electrons diffuse, they leave positively charged ions (donors) in the n region.
Many people think that a baby rabbits is called a bunny, but this is actually just an affectionate nickname for rabbits, and not the correct English name for rabbit babies. So if baby rabbits are not called bunnies, then what are baby rabbits called? The correct term for a baby rabbit is kitten, often shortened to kit.
A baby duck is known as a duckling. A baby eagle is known as a fledgling or eaglet. A baby goose is known as a gosling, and a baby hawk is known as an eyas. A baby swan is known as a cygnet or a flapper.