Reducing halide segregation in wide-bandgap mixed-halide perovskite solar cells using redox mediators

Photovoltaic performance of monolithic PO-TSCs. Credit: Nature Energy (2024). DOI: 10.1038/s41560-024-01451-8

Multi-junction solar cells, solar cells comprised of many individual semiconductor junctions stacked together, have the potential of outperforming single-junction solar cells both in terms of efficiency and stability. In recent years, material scientists and engineers have been trying to identify viable material combinations for fabricating these solar cells.

A class of materials found to be promising for these applications is metal halide perovskites, semiconductors with inherent properties that are advantageous for developing various optoelectronic devices and photovoltaics. While the efficiency of tandem solar cells based on these …
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