Speaker: Joseph Berry, NREL
Program Description
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 and challenges in hybrid perovskite solar cells (HPSCs) with an emphasis on the role of the interface in device performance including stability. This talk will highlight work at NREL to develop scalable HPSCs highlighting efforts to controlling the material formation for high-volume manufacturing. In addition to address stability, an examination of different perovskite active layers and their interfacial electronic structure with HPSCs 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 carrier dynamics will be shown and the technological relevance discussed. Insights regarding the functional interfaces in HPSCSs will also be presented with a focus on our result to understand the oxide/perovskite interface.
