The Fraunhofer Institute for Organic Electronics, Electron Beam and Plasma Technology FEP (Dresden, Germany) has been involved in development of OLED-on-silicon sensors for years. The researchers have recently developed a miniaturised phosphorescence sensor that combines a marker and sensor on very small chip surface that could be produced at low cost in the long term. Researchers will present the first prototype of the sensor, which is currently designed for oxygen ratio monitoring, at embedded world 2019, 26-28 February in Nuremberg, Germany.