This article discusses a breakthrough in perovskite solar cells, particularly focusing on controlling crystal growth alignment in low-dimensional perovskites (LDPs) with wide band gaps, which has been a challenge due to poor charge transport. By introducing chlorine to the precursor solution, researchers induced vertical crystal growth, enhancing charge flow. This led to a record power conversion efficiency of 9.4% for a wide-band-gap perovskite solar cell. The study highlights the atomic-level mechanisms behind this improvement, offering potential applications in energy-efficient smart facades and indoor energy harvesting technologies.
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https://www.nature.com/articles/s41467-024-53339-6
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