2, Centre National de la Recherche Scientifique (CNRS), Paris, , France
Photovoltaic devices based on hybrid organic-inorganic perovskite absorbers have reached outstanding performance over the past few years, surpassing power conversion efficiency of over 22%. This talk we discuss recent progress at the National Renewable Energy Lab (NREL) on the challenges in hybrid perovskite solar cells (HPSCs) targeting large scale energy generation. This talk will highlight work at NREL to develop understand and enhance stability of HPSCs inline with realizing a scalable HPSC technology. Talk will discussing efforts to controlling interfaces in the devices and key aspects of material formation and processing for high-volume manufacturing. In the case of stability, an examination of different perovskite active layers their formation and resulting interfacial electronic structure with typical and novel contacts with the HPSCs stack will be presented. Our studies at NREL indicate interface formation of the active layer with different carrier transport materials has direct implications for performance and it evolution over time in the resulting devices. Results of interface studies combined with time resolved spectroscopy, structural studies and device level studies to validate impacts on interface electronics and carrier dynamics will be shown and the technological relevance discussed. In particular work on mini-module devices at the 26cm2 will be presented along with performance data for these systems.