From Marco to Micro, Mastering the Defective Nature of Perovskite Solar Cells

For metal halide perovskites, the material complexities of managing structural strains, surface imperfections, and the intricacies of thin-film form factors underscore the need to master a crucial "Goldilocks Zone" of their material properties. Fine-tuning doping concentrations, energy levels, and defect states is critical for optimal device performance. Although metal-halide perovskite solar cells are considered "defect-tolerant," achieving peak efficiencies and enhanced operational stability in optoelectronic applications requires precise control over growth and defect passivation. The crux of maximizing performance lies in mitigating non-radiative defect-mediated recombination through passivation. In this talk, I will present a framework that combine an operando hyperspectral imaging system for formulating a practical mitigation plan to track the root causes and tackle the challenges that dictate the photovoltaic performance and long-term operational stability of perovskite solar cells.