Charge transfer and current fluctuations in single layer graphene transistors modified by self-assembled C60 adlayers

Rui Wang; Shengnan Wang; Xiaowei Wang; Jakob A S Meyer; Per Hedegård; Bo W Laursen; Zhihai Cheng; Xiaohui Qiu

doi:10.1002/smll.201300869

Charge transfer and current fluctuations in single layer graphene transistors modified by self-assembled C60 adlayers

Small. 2013 Jul 22;9(14):2420-6. doi: 10.1002/smll.201300869. Epub 2013 Jun 21.

Authors

Rui Wang¹, Shengnan Wang, Xiaowei Wang, Jakob A S Meyer, Per Hedegård, Bo W Laursen, Zhihai Cheng, Xiaohui Qiu

Affiliation

¹ Key Laboratory of Standardization and Measurement for Nanotechnology, Chinese Academy of Sciences, National Center for Nanoscience and Technology, Beijing 100190, PR China.

PMID: 23788519
DOI: 10.1002/smll.201300869

Abstract

Flicker noise in a "fullerene + graphene" hybrid transistor is investigated to reveal the electrical coupling between the graphene channel and C60 adsorbates. The charge trapping and detrapping events at the C60 /graphene interface induce current fluctuations in the devices. The evolution of noise characteristics at varying temperatures indicates the different contributions related to Coulomb scattering and charge exchange kinetics.

Keywords: 1/f noise; charge transfer; fullerenes; graphene; transistors.