Graphene-nanodots for sustainable fabrication of light-emitting devices for MedTech applications

Purpose and goal:

In the project, a low-cost and sustainable manufacturing process for thin and flexible light-emitting electrochemical cells (LECs) was developed by replacing the current fossil-based emitter materials with bio-based graphene nanodots (GNPs). The production of GNPs has taken place through a one-step synthesis and purification process that is scalable and uses only green and renewable solvents.

Furthermore, we have developed a sustainable manufacturing process for functional GNP-based LECs, which emit in colors suitable in various applications, for instance within medtech. Expected results and effects:

A total of 6 types of GNPs have been synthesized in a sustainable and scalable process. These meet the performance requirements and emit in different colors from violet to deep red. The GNPs have been applied in LECs where the resulting brightness, voltage and turn-on time are within the customer requirements LunaLEC has for commercial applications.

The project has resulted in a secured value chain for sustainable light-emitting materials and that we will eventually be able to offer sustainable GNPs, as well as GNP-based LECs, of varying colors, suitable for a wide range of applications. Approach and implementation:

The development of the manufacturing method and performance of the GNPs has been led by Umeå University and the development of the application in LECs has been led by LunaLEC. Close cooperation with the exchange and discussion of results has contributed to a rapid improvement in results. The project was delayed due to changes in LunaLEC´s external funding but has been able to be carried out through other means.

We also mention that Umeå University is investigating the possibilities for additional commercial applications for the GNPs developed in the project.