Why is the terminology for n-p type semi-conductors different from convention?

[Dranzer]

Homework Statement

I am reading a chapter on semi-conductors in a text.It talks about n-p type semi-conductors and states that "the potential of the n-side is higher than that of the p-side"

However, by convention, in case of batteries for example,we designate the negative terminal as lower potential and the positive terminal as higher potential.

So, what can be the reason behind the author's terminology?

Thanks.

 

[CWatters]

P-type material has an excess of holes. N-type material has an excess of electrons. This is the reason they are called P and N type.

It just happens that when a junction is formed the holes and electrons diffuse across the junction making the P-type side negative and the N-type side positive.