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Anton I. Manilov,Aleksey V. Kozinetz,Sergiy V. Litvinenko,Valeriy A. Skryshevsky,Mohammed Al Araimi,Alex Rozhin 한국물리학회 2019 Current Applied Physics Vol.19 No.3
We identified different nano-carbon species such as graphene nanoplatelets, graphite flakes and carbon nanotubes dispersed in N-methyl-2-pyrrolidone using a novel sensor structure based on a “deep” silicon barrier working as a photoelectrical transducer. Each nano-carbon particle has specific signature in both 2D photocurrent distribution and photocurrent dependencies on bias changing surface band-bending. Additionally, all nano-carbon particles have characteristic features in the time-dependent evolution of photocurrent. The obtained results can be explained by the influence of nano-carbon molecules' local electric field on the recombination parameters of defect centers on the silicon surface.