In n-type material, majority carriers would be

In n-type material, the majority of carriers would be Electrons

N-type semiconductors:

An extrinsic semiconductor where the dopant atoms provide extra conduction electrons to the host material like Phosphorus P in Silicon Si.

This creates an excess of negative (n-type) electron charge carriers that are able to move freely.

P-type semiconductors: 

A semiconductor, when the impurity with trivalency is added to pure semiconductors, then it is known as a p-type semiconductor.

Impurities with trivalency such as Boron (B), Gallium (Ga), Indium(In), Aluminium(Al), etc are called acceptor impurity.