I have been working on exfoliated graphene FET devices. When I fabricate devices and characterize them, dirac point shifts to very high voltages e.g., 80V. I have tried chloroform cleaning after lift-off process, it helped to remove PMMA residues and dirac point shifted aroud 20 to 30 V. I need to restore dirac point close to 0V.

More Dawuth Pathan's questions See All
Similar questions and discussions