Organic light-emitting diodes (OLEDs) are already used in almost all smartphones and high-end televisions. They consist of self-illuminating thin-film components based on organic semiconductors. In this project, we are pursuing an innovative approach: the development of a blue emitter based on lanthanide complexes (rare earths). These molecules enable efficient light generation in the blue spectral range and, due to their intrinsic stability, offer a significantly longer service life than previously used technologies. In addition, despite their name, the rare earth elements europium (Eu) and cerium (Ce) used are abundant in the earth's crust, which ensures a cost-effective and sustainable supply of raw materials. Thanks to the project funding, we can develop promising material ideas to market maturity in a targeted manner.