We demonstrate effective non-destructive p-type doping of graphene via surface modification with molybdenum trioxide (MoO3) thin film using electrical transport measurements. The p-type doping via MoO3 modification of graphene leads to the downward shift of Fermi level towards the valence band. MoO3 modified graphene retains its high charge carrier mobility, facilitating the observation of quantum Hall effect. In-situ ultraviolet photoelectron spectroscopy studies also show that air exposure of MoO3 modified graphene reduces the doping efficiency.
Electrical measurement of non-destructively p-type doped graphene using molybdenum trioxide
Lanfei Xie, Xiao Wang, Hongying Mao, Rui Wang, Mianzhi Ding, Yu Wang, Barbaros Özyilmaz, Kian Ping Loh, Andrew T. S. Wee, Ariando, Wei Chen; Electrical measurement of non-destructively p-type doped graphene using molybdenum trioxide. Appl. Phys. Lett. 4 July 2011; 99 (1): 012112. https://doi.org/10.1063/1.3609318
Download citation file: