Charge-transfer insulators
= Charge-transfer insulators
{wiki=Charge-transfer_insulators}
Charge-transfer insulators are a class of materials that exhibit insulating behavior due to the presence of a charge-transfer gap between the valence and conduction bands. Unlike conventional insulators, which have a large bandgap protecting electron mobility (thus preventing electrical conductivity), charge-transfer insulators involve an electron transfer process between different species in the solid.