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Competing light extraction strategies in perovskite light-emitting diodes

Nature Nanotechnology (2024)Cite this article

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Light extraction is a key factor determining the efficiency of light-emitting diodes. This becomes more pronounced in high-refractive-index perovskite light-emitting diodes according to the ray-optics model. Photon recycling and microcavity effect are important ways to break through the ray-optics efficiency limit. However, these two effects are competing, that is, strategies to optimize them are mutually exclusive. For a breakthrough in efficiency, we should favour one of them and inhibit the other.

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Fig. 1: The flow diagrams of photon recycling and microcavity effect, showing the interrelations of various effects.
Fig. 2: Efficiency analyses of photon recycling and microcavity.

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Acknowledgements

We acknowledge funding support from the National Key Research and Development Program of China (nos. 2022YFB3602903, 2021YFB3602703 and 2022YFB3606504), National Natural Science Foundation of China (no. 62122034), Guangdong University Key Laboratory for Advanced Quantum Dot Displays and Lighting (no. 2017KSYS007), Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting (no. ZDSYS201707281632549), Shenzhen Science and Technology Program (no. JCYJ20220818100411025), and Shenzhen Development and Reform Commission Project (Grant no. XMHT20220114005).

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Authors and Affiliations

  1. Key Laboratory of Energy Conversion and Storage Technologies (SUSTech), Ministry of Education, Southern University of Science and Technology, Shenzhen, China

    Guanding Mei, Kai Wang & Xiao Wei Sun

  2. Shenzhen Key Laboratory for Advanced Quantum Dot Displays and Lighting, Southern University of Science and Technology, Shenzhen, China

    Guanding Mei, Kai Wang & Xiao Wei Sun

  3. Institute of Nanoscience and Applications and Department of Electrical and Electronic Engineering, Southern University of Science and Technology, Shenzhen, China

    Guanding Mei, Kai Wang & Xiao Wei Sun

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  1. Guanding Mei
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  2. Kai Wang
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Correspondence to Xiao Wei Sun.

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Nature Nanotechnology thanks Jeong-Hwan Lee, Sergio Brovelli and the other, anonymous, reviewer(s) for their contribution to the peer review of this work.

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Mei, G., Wang, K. & Sun, X.W. Competing light extraction strategies in perovskite light-emitting diodes. Nat. Nanotechnol. (2024). https://doi.org/10.1038/s41565-024-01709-y

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  • DOI: https://doi.org/10.1038/s41565-024-01709-y

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