In accordance with various embodiments, an organic electronic device includes an n-type dopant material including an imidazole-based material having a hydrogen-based material bonded between nitrogen atoms. The n-type dopant material n-dopes an organic material, and can be used to mitigate degradation in mobility due to conditions such as exposure to ambient atmosphere, which can effect an undesirable reduction in charge transport. Other embodiments are directed to carbon nanotubes or graphene structures with this type of n-type dopant, wherein the Fermi level for the carbon nanotubes or graphene structures is below −2.5 eV to effect such n-type doping.