Read the passage and answer the question.

When the two types of semiconductors are joined together, diffusion of electrons and holes from their side of excess takes place and continues for a while after which a depletion layer is formed close to the junction on either side which stops any further diffusion of these carriers. A potential difference appears to have set up at the junction.

What is this potential difference called?

both 1 and 2

The potential difference is called Potential barrier or barrier height.