Effect of nano-carbon dispersions on signal in silicon-based sensor structure with photoelectrical transducer principle

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Abstract

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.

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Original languageEnglish
JournalCurrent Applied Physics
Early online date17 Dec 2018
DOIs
Publication statusE-pub ahead of print - 17 Dec 2018

    Keywords

  • Carbon nanotubes, Graphene, Photoelectrical sensor, Silicon

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