Journal
NANOMATERIALS
Volume 8, Issue 7, Pages -Publisher
MDPI
DOI: 10.3390/nano8070517
Keywords
laser-induced graphene; polyimide; flexible electronics; laser-scribing; sheet resistance; contact resistance
Categories
Funding
- Spanish Ministry of Education, Culture and Sport (MECD)
- European Union
- University of Granada [TEC2017-89955-P, FPU16/01451, H2020-MSCA-IF-2017 794885]
- University of Granada through the grant Initiation to Research
- German Research Foundation (DFG)
- Technical University of Munich
Ask authors/readers for more resources
This work presents a detailed study of the photothermal ablation of Kapton (R) polyimide by a laser diode targeting its electrical conductivity enhancement. Laser-treated samples were structurally characterized using Scanning Electron Microscopy (SEM), Raman spectroscopy, X-ray Photoelectron Spectroscopy (XPS), as well as Diffuse Reflectance Infrared Fourier Transform (DRIFT) spectroscopy. The results show that the laser-assisted ablation constitutes a simple one-step and environmental friendly method to induce graphene-derived structures on the surface of polyimide films. The laser-modified surface was also electrically characterized through the Transmission Line Method (TLM) aiming at the improvement of the conductivity of the samples by tuning the laser power and the extraction of the contact resistance of the electrodes. Once the laser-ablation process is optimized, the samples increase their conductivity up to six orders of magnitude, being comparable to that of graphene obtained by chemical vapor deposition or by the reduction of graphene-oxide. Additionally, we show that the contact resistance can be decreased down to promising values of similar to 2 Omega when using silver-based electrodes.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available