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)