Electrical excitation of a perovskite light-emitting diode is shown to contribute to optical gain, a milestone on the path towards a non-epitaxial laser diode.
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Rand, B.P., Giebink, N.C. A bit of gain, electrically injected. Nat. Photon. 18, 107–108 (2024). https://doi.org/10.1038/s41566-023-01365-z
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DOI: https://doi.org/10.1038/s41566-023-01365-z