SimOEP is an international conference gathering organic and perovskite solar cell and OLED experts. It centers on subjects like charge and heat transport, exciton dynamics, and light propagation. Through physical models and simulation algorithms, the event tackles advancements and challenges in the field. It fosters interdisciplinary collaboration and aims to establish dependable physical models for future research. The conference, held in Winterthur, will also showcase R&D tool demonstrations by Fluxim.