Why the majority carriers in graphene without field effect is p-type?

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Gia Quyet Ngo

Dear Hasan,

As I know graphene is often p-doped by water, oxygen or nitrogen dioxide when it is exposed to the air. That is why without the electric field, the majority charge carriers are holes.

I hope that information can help you.

A Z M Nowzesh Hasan

Dear Gia Quyet Ngo, thanks for your valuable answer. This is very helpful.