All-perovskite tandem solar cell built with laser polishing achieves 29.80% efficiency

Chinese researchers developed an all-perovskite tandem solar cell using a non-contact laser polishing strategy that reduces surface defects and improves charge extraction in lead-tin perovskite films. The device achieved up to 29.80% tandem efficiency, with the bottom cell improving from 19.64% to 24.07% and showing strong operational stability under continuous illumination.Researchers at the Huazhong University of Science and Technology in China have developed an all-perovskite tandem solar cell using a non-contact laser polishing strategy that reportedly improves the surface morphology of perovskite ...

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