Gate-dependent photoconductivity of single layer graphene grafted with metalloporphyrin molecules

M. S. Choi, D. J. Lee, S. J. Lee, D. H. Hwang, J. H. Lee, N. Aoki, Y. Ochiai, H. J. Kim, D. Whang, S. Kim, S. W. Hwang

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Abstract

We present the gate-dependent photoconductivity measurements of single layer graphene ribbons grafted with zinc porphyrin molecules Zn(OEP). The Zn(OEP)-graphene showed a maximum 610 increase in its photo-sensitivity compared to the bare graphene samples. Furthermore, the measured photocurrent exhibited strong dependence on the gate bias, light power, and light wavelength. These dependences showed clear evidence of the excitation of the carriers in Zn(OEP) and their energy transfer to graphene.

Original languageEnglish
Article number163116
JournalApplied Physics Letters
Volume100
Issue number16
DOIs
Publication statusPublished - 2012 Apr 16

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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    Choi, M. S., Lee, D. J., Lee, S. J., Hwang, D. H., Lee, J. H., Aoki, N., Ochiai, Y., Kim, H. J., Whang, D., Kim, S., & Hwang, S. W. (2012). Gate-dependent photoconductivity of single layer graphene grafted with metalloporphyrin molecules. Applied Physics Letters, 100(16), [163116]. https://doi.org/10.1063/1.4704921