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  • RESEARCH BRIEFINGS

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

Stacking 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.

This is a summary of: Ke, Y. et al. High-performance tandem perovskite LEDs through interlayer photon recycling. Nature 649, 53–58 (2026).

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doi: https://doi.org/10.1038/d41586-025-04021-4

Publisher’s note: N.W. and J.W. used ChatGPT to help prepare their contribution to this Research Briefing.

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