Grat-Film™
Grat-FilmTM: The highest quality graphene, as-grown on copper foil.
We set out on a mission to create the highest-quality graphene and to build it at great value. The result is Grat-FilmTM – the kind of innovation that brings greatness to life.
- Available in any dimension up to 24 x 300 inches
- Highest monolayer coverage: 90% by area
- Ideal transparency: 98% transmittance
- Low resistance: < 250 Ohm/square
Each of our Grat-FilmTM products are created and optimized to meet the demands of various applications. GratomTM-M products feature mono-layer graphene sheet with low defect density to achieve a high carrier mobility. GratomTM-R products are tailored to achieve a low sheet resistance. GratomTM-S product is a special graphene product that contacts isolated graphene domains. GratomTM-A products are large-area graphene with dimensions as large as 24” x 300”.
Grat-FilmTM side-by-side comparison (PDF)
|
Gratom-A |
Gratom-R |
Gratom-M |
Gratom-S |
|
| Domain size (µm) | > 10 | > 10 | > 10 | > 30, > 200 |
| Product size (in2) | 12×60, 24×60, 24×100, 24×300 | 2×2 , 4×4, 8×12, 12×16 | 2×2 , 4×4,1 cm2 | 2×2 |
| Film morphology | Continuous monolayer film with 10-30 % of adlayer islands (2-5 layers) | Continuous monolayer film with 10-30 % of adlayer islands (2-5 layers) | Continuous monolayer film with very few adlayers (< 5%) |
Isolated monolayer domains |
| Resistance (Ω/□) | < 1000 | < 600 [1] | N/A | N/A |
| Mobility[2] (cm2/Vs) | N/A | N/A | > 2000, > 2500, > 3000, > 3500 |
N/A |
| Transmittance at 550 nm | > 95% | > 97%[3] | > 97% | N/A |
| Substrates | Cu | Cu | Cu, Quartz, PET, SiO2/Si | Cu, SiO2/Si |
| Applications | Touch Panel Display Solar Cells Electronics NEMs Sensors LED/OLED Medical/bio |
LED/OLED Touch Panel Display Solar Cells Fundamental Research |
Research Electronics NEMs Sensors LED/OLED Touch Panel Display Solar Cells |
Research Electronics NEMs Sensors |
[1] Derived value corresponding to carrier density of 1×1012 /cm2
[2] Can be customized to below 60 Ω/□
[3] Transmittance as a function of sheet resistance. Typically, lower sheet resistance comes with a lower transmittance.
Grat-FilmTM Documentation
Grat-FilmTM overview (PDF)
Grat-FilmTM highlights (PDF)
Grat-FilmTM price sheet (PDF)
Complete characterization
- Transmittance and uniformity (optical image)
- Crystallinity (Raman spectroscopy)
- Sheet resistance (four-probe measurement)
- Doping density and carrier mobility (Hall effect)
