Please use this identifier to cite or link to this item: https://hdl.handle.net/11147/9542
Title: Impact of encapsulation method on the adsorbate induced electrical instability of monolayer graphene
Authors: Kalkan, Sırrı Batuhan
Yanılmaz, Alper
Çelebi, Cem
Issue Date: 2019
Publisher: AVS Science and Technology Society
Abstract: Monolayer graphene transferred onto a set of silicon carbide (SiC) substrates was encapsulated with a thin SiO2 film in order to prevent its interaction with atmospheric adsorbates. The encapsulation of graphene samples was realized by using two different thin film growth methods such as thermal evaporation (TE) and state-of-the-art pulsed electron deposition (PED). The encapsulation efficiency of these two techniques on the structural and electrical characteristics of graphene was compared with each other. Scanning electron microscopy (SEM) analysis showed that unlike the SiO2 thin film grown with PED, structural defects like cracks were readily formed on TE grown films due to the lack of surface wettability. The electronic transport measurements revealed that the electrical resistivity of graphene has been increased by two orders of magnitude, and the carrier mobility has been subsequently decreased upon the encapsulation process with the PED method. However, in-vacuum transient photocurrent spectroscopy (TPS) measurements conducted for short periods and a few cycles showed that the graphene layer encapsulated with the PED grown SiO2 film is electrically far more stable than the one encapsulated with TE grown SiO2 film. The results of TPS measurements were related to the SEM images to unravel the mechanism behind the improved electrical stability of graphene samples encapsulated with the PED grown SiO2 film.
URI: https://doi.org/10.1116/1.5099141
https://hdl.handle.net/11147/9542
ISSN: 0734-2101
1520-8559
Appears in Collections:Physics / Fizik
Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection
WoS İndeksli Yayınlar Koleksiyonu / WoS Indexed Publications Collection

Files in This Item:
File SizeFormat 
1.5099141.pdf1.29 MBAdobe PDFView/Open
Show full item record



CORE Recommender

SCOPUSTM   
Citations

1
checked on Dec 2, 2023

WEB OF SCIENCETM
Citations

1
checked on Jun 19, 2023

Page view(s)

36
checked on Dec 4, 2023

Download(s)

18
checked on Dec 4, 2023

Google ScholarTM

Check




Altmetric


Items in GCRIS Repository are protected by copyright, with all rights reserved, unless otherwise indicated.