Electrical properties of SiO2-based graphene under monochromatic visible light irradiation

The purpose of this study is to investigate the electrical properties of graphene transparent conductive film under visible light irradiation. Sample in the study is chemical vapor deposition (CVD) growth graphene on the surface of copper foils and then transferred to the SiO2 substrate. Three monochromatic visible lights with wavelength of 635nm, 520nm and 450nm representing red (R), green (G) and blue (B) lights are used as irradiation sources. Results show that the graphene resistances increase slowly under light irradiation with all the three different wavelengths, while decrease slowly after the light is switched off. Light irradiation with higher power density will induce larger relative resistance change. When graphene is irradiated at the same density, blue light irradiation may result in the largest resistance change.

[1]  Andre K. Geim,et al.  Electric Field Effect in Atomically Thin Carbon Films , 2004, Science.

[2]  Andre K. Geim,et al.  Raman spectrum of graphene and graphene layers. , 2006, Physical review letters.

[3]  F. M. Peeters,et al.  Adsorption of H 2 O , N H 3 , CO, N O 2 , and NO on graphene: A first-principles study , 2007, 0710.1757.

[4]  Klaus Kern,et al.  Atomic hole doping of graphene. , 2008, Nano letters.

[5]  M. Johnston,et al.  Extreme sensitivity of graphene photoconductivity to environmental gases , 2012, Nature Communications.

[6]  M. Osada,et al.  The formation of graphene–titania hybrid films and their resistance change under ultraviolet irradiation , 2012 .

[7]  X. Liang,et al.  Ultraviolet/ozone treatment to reduce metal-graphene contact resistance , 2012, 1212.0838.

[8]  M. W. Iqbal,et al.  Formation of p–n junction with stable p-doping in graphene field effect transistors using deep UV irradiation , 2013 .

[9]  T. Ohshima,et al.  E1/E2 traps in 6H-SiC studied with Laplace deep level transient spectroscopy , 2013 .

[10]  Y. Lin,et al.  Tuning the work function of graphene by ultraviolet irradiation , 2013 .

[11]  Jianxin Zhou,et al.  Recent Progress of Graphene Doping , 2014 .

[12]  J. Kong,et al.  Challenges and opportunities for graphene as transparent conductors in optoelectronics , 2015 .

[13]  S. Ichimura,et al.  Effect of ultraviolet light irradiation and ion collision on the quality of multilayer graphene prepared by microwave surface-wave plasma chemical vapor deposition , 2016 .