Highly efficient LED device built by stacking layers of...

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Highly efficient LED device built by stacking layers of light-emitting perovskite

Nature, Published online: 31 December 2025; doi:10.1038/d41586-025-04021-4Stacking light-generating layers in tandem light-emitting diodes (LEDs) can enhance performance, but achieving efficient and stable tandem LEDs made with perovskite materials has remained a challenge. A tandem perovskite-based device that seems to benefit from recycling of photons between stacked layers demonstrates highly efficient performance, surpassing the combined emissions of two single-unit devices.

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