We present a comparative study of the environmental and thermal stability of graphene charge transfer doping using molybdenum–trioxide (MoO3), vanadium–pentoxide (V2O5) and tungsten–trioxide (WO3). Our results show that all these metal oxides allow a strong and stable p-type doping of graphene, as well as functioning as effective hole-injection layers for highly efficient organic light emitting diodes.
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Kuruvila et al. (2014) studied this question.
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