@inproceedings{beee6d4651f54a1b88edacc7d22043ae,
title = "Variability of graphene mobility and contacts: Surface effects, doping and strain",
abstract = "It is well known that devices based on chemical vapor deposited (CVD) graphene exhibit substantial variability of their electrical properties [1]. However, the sources of such variability and how they might be controlled remain poorly understood. Here, we methodically investigate variability of CVD graphene field-effect transistors (GFETs) transferred with three polymer scaffolds: PMMA, polycarbonate (PC), and a PC/PMMA bilayer (PC in contact with graphene). We find that the polymer/graphene mechanical interaction during transfer and the presence of surface residues induce changes in graphene roughness (up to ∼0.2 nm), doping concentrations (up to ∼2. 5×1012 cm-2) and strain levels (up to ∼0.2%) between the polymer scaffolds used. We uncover that a combination of smaller strain and doping from the PC/PMMA scaffolds ultimately yields the lowest variability of contact resistance (Rc) and mobility (μ).",
author = "Carrion, {Enrique A.} and Wood, {Josh D.} and Ashkan Behman and Maryann Tung and Lyding, {Joseph W.} and Eric Pop",
year = "2014",
doi = "10.1109/DRC.2014.6872366",
language = "English (US)",
isbn = "9781479954056",
series = "Device Research Conference - Conference Digest, DRC",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "199--200",
booktitle = "72nd Device Research Conference, DRC 2014 - Conference Digest",
address = "United States",
note = "72nd Device Research Conference, DRC 2014 ; Conference date: 22-06-2014 Through 25-06-2014",
}