First Graphene Limited provides an update on work conducted with subsidiary 2D Fluidics Pty Ltd. ('2D Fluidics') using its Vortex Fluidics Device ("VFD"), with progress in establishing yield, scale and suitability of the produced gGOTM material. Researchers at the Flinders Institute for Nanoscale Science and Technology have demonstrated the Green Graphene Oxide (gGOTM) produced from the VFD gives a improvement in the Power Conversion Efficiency (PCE) of organic photovoltaic (OPV) cells. The PCE is a measure of the amount of solar energy which is converted to electrical energy in the OPV cell. The initial data shows the addition of a relatively small amount of gGO as a layer in an OPV cell increased the power conversion efficiency by 8%, taking it into a range which makes it attractive for further research towards the next generation of OPV cells. The efficiency improvement is understood to occur due to the gGO decreasing the work function of the active layer. The next step will see the researchers further improve the system, by improving the gGO formulation methods as well as attempting to remove the ZnO layer from the cell, to make a flexible organic photovoltaic cell which can be used for a wider range of applications, including wearable sensors. A separate study with researchers at Queensland University has shown that Green Graphene Oxide (gGO) is photoluminescent, with narrow absorption and emissions bands confirming the presence of ordered sp2 domains with a relatively small size. This indicates the VFD can generate pristine graphene, which is separated by functionalised areas, giving it a specific electronic structure, which accounts for the photoluminescence. The researchers have observed absorption of light at 277 nm with corresponding emissions at 378 nm and 395 nm. This behaviour is not seen in "traditional" graphene oxide produced using Hummer's method. However, it is seen in carbon quantum dots, which has a more regular structure. This demonstrates 2D Fluidics' capability to consistently produce Green Graphene Oxide with controlled surface oxidation levels and a consistent structure.