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Enhancing photoluminescence yields in lead halide perovskites by photon recycling and light out-coupling

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  • Johannes M. Richter

    (Cavendish Laboratory, University of Cambridge)

  • Mojtaba Abdi-Jalebi

    (Cavendish Laboratory, University of Cambridge)

  • Aditya Sadhanala

    (Cavendish Laboratory, University of Cambridge)

  • Maxim Tabachnyk

    (Cavendish Laboratory, University of Cambridge)

  • Jasmine P.H. Rivett

    (Cavendish Laboratory, University of Cambridge)

  • Luis M. Pazos-Outón

    (Cavendish Laboratory, University of Cambridge)

  • Karl C. Gödel

    (Cavendish Laboratory, University of Cambridge)

  • Michael Price

    (Cavendish Laboratory, University of Cambridge)

  • Felix Deschler

    (Cavendish Laboratory, University of Cambridge)

  • Richard H. Friend

    (Cavendish Laboratory, University of Cambridge)

Abstract

In lead halide perovskite solar cells, there is at least one recycling event of electron–hole pair to photon to electron–hole pair at open circuit under solar illumination. This can lead to a significant reduction in the external photoluminescence yield from the internal yield. Here we show that, for an internal yield of 70%, we measure external yields as low as 15% in planar films, where light out-coupling is inefficient, but observe values as high as 57% in films on textured substrates that enhance out-coupling. We analyse in detail how externally measured rate constants and photoluminescence efficiencies relate to internal recombination processes under photon recycling. For this, we study the photo-excited carrier dynamics and use a rate equation to relate radiative and non-radiative recombination events to measured photoluminescence efficiencies. We conclude that the use of textured active layers has the ability to improve power conversion efficiencies for both LEDs and solar cells.

Suggested Citation

  • Johannes M. Richter & Mojtaba Abdi-Jalebi & Aditya Sadhanala & Maxim Tabachnyk & Jasmine P.H. Rivett & Luis M. Pazos-Outón & Karl C. Gödel & Michael Price & Felix Deschler & Richard H. Friend, 2016. "Enhancing photoluminescence yields in lead halide perovskites by photon recycling and light out-coupling," Nature Communications, Nature, vol. 7(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms13941
    DOI: 10.1038/ncomms13941
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    Cited by:

    1. Michael B. Price & Paul A. Hume & Aleksandra Ilina & Isabella Wagner & Ronnie R. Tamming & Karen E. Thorn & Wanting Jiao & Alison Goldingay & Patrick J. Conaghan & Girish Lakhwani & Nathaniel J. L. K., 2022. "Free charge photogeneration in a single component high photovoltaic efficiency organic semiconductor," Nature Communications, Nature, vol. 13(1), pages 1-10, December.
    2. Jun Nishida & Peter T. S. Chang & Jiselle Y. Ye & Prachi Sharma & Dylan M. Wharton & Samuel C. Johnson & Sean E. Shaheen & Markus B. Raschke, 2022. "Nanoscale heterogeneity of ultrafast many-body carrier dynamics in triple cation perovskites," Nature Communications, Nature, vol. 13(1), pages 1-9, December.

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