Nano Science and Technology Institute
Nanotech 2014 Vol. 3
Nanotech 2014 Vol. 3
Nanotechnology 2014: Electronics, Manufacturing, Environment, Energy & Water
Chapter 1: Nano, Organic, Flexible & Printed Electronics

Temperature Stability of PAG-Doped-Graphene, Towards Commercial Production of Graphene Integrated Circuits

Authors:H. Al-Mumen and W. Li
Affilation:Michigan State University, US
Pages:37 - 40
Keywords:graphene, transistor
Abstract:In our previous work we found out a highly in air stable technique, defect-less, and relatively high electron mobility for n-doping graphene nanomesh using PAG (an element of SU-8 resist compound). This work demonstrated the temperature stability of the graphene field effect transistor (FET) which was doped by PAG. We studied the current transfer characteristics in a temperature range from ~ -15 ⁰C to + 100 ⁰C. We also studied the temperature dependence of Raman spectra of both pristine and n-doped graphene samples. All the spectra were excited using a visible (532 nm) laser with a relatively low laser power (0.53 mW) to avoid graphene heating by the excitation laser. The extracted negative temperature coefficients of G-mode for mono- and bi-layer pristine graphene were -0.042 cm-1/⁰C and -0.023 cm-1/⁰C, respectively. The temperature dependence of PAG doped n-type graphene FET was also investigated. The corresponded G-mode temperature coefficients of n-doped mono- and bi-layer were determined to be -0.0692 and -0.0024, respectively. The results indicate that the G-mode temperature coefficient of the n-doped mono-layer graphene had relatively a highest sensitivity to temperature which can be attributed to the inharmonic coupling of phonon modes.
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