Presto (operando PV Station) builds on HZB’s worldwide leading role in PV research and is envisioned as a modular endstation for spectroscopy and diffraction experiments on modern and emerging PV materials and their interfaces, up to full solar cells. Research foci are on the identification of bulk and interface defects, as well as quantification of their density, energy levels, formation energy, and passivation behaviour. Presto aims at gaining a comprehensive understanding of critical parameters in PV devices, so that their power conversion efficiency, stability, scalability, and manufacturability can be boosted. The multimodal investigations under device operation conditions, i.e., light exposure (a few suns), electrical biasing, and aging conditions (elevated temperature, humidity, oxidizing agents) push PV research to a new level. It will significantly expand BESSY II’s operando and in-situ capabilities in (HAX)PES, XAS, XRF, IPES, UPS, CFSYS, SPV, and XRD studies. Uniqueness: While the individual methods are available in numerous large-scale laboratories, the experimental capabilities of Presto are holistic and unprecedented worldwide. In-situ and operando capacity, combined with sample environment and diagnostic sample integrity control, closes the gaps between the present research approaches in the field. Partners: HZB, HU Berlin
