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Efficient metal halide perovskite light-emitting diodes with significantly improved light extraction on nanophotonic substrates

Author

Listed:
  • Qianpeng Zhang

    (Clear Water Bay
    No. 9 Yuexing first RD, South Area, Hi-tech Park, Nanshan)

  • Mohammad Mahdi Tavakoli

    (Clear Water Bay)

  • Leilei Gu

    (Clear Water Bay
    No. 9 Yuexing first RD, South Area, Hi-tech Park, Nanshan)

  • Daquan Zhang

    (Clear Water Bay)

  • Lei Tang

    (Clear Water Bay)

  • Yuan Gao

    (Clear Water Bay)

  • Ji Guo

    (Clear Water Bay)

  • Yuanjing Lin

    (Clear Water Bay)

  • Siu-Fung Leung

    (Clear Water Bay
    King Abdullah University of Science and Technology)

  • Swapnadeep Poddar

    (Clear Water Bay)

  • Yu Fu

    (Clear Water Bay)

  • Zhiyong Fan

    (Clear Water Bay
    No. 9 Yuexing first RD, South Area, Hi-tech Park, Nanshan)

Abstract

Metal halide perovskite has emerged as a promising material for light-emitting diodes. In the past, the performance of devices has been improved mainly by optimizing the active and charge injection layers. However, the large refractive index difference among different materials limits the overall light extraction. Herein, we fabricate efficient methylammonium lead bromide light-emitting diodes on nanophotonic substrates with an optimal device external quantum efficiency of 17.5% which is around twice of the record for the planar device based on this material system. Furthermore, optical modelling shows that a high light extraction efficiency of 73.6% can be achieved as a result of a two-step light extraction process involving nanodome light couplers and nanowire optical antennas on the nanophotonic substrate. These results suggest that utilization of nanophotonic structures can be an effective approach to achieve high performance perovskite light-emitting diodes.

Suggested Citation

  • Qianpeng Zhang & Mohammad Mahdi Tavakoli & Leilei Gu & Daquan Zhang & Lei Tang & Yuan Gao & Ji Guo & Yuanjing Lin & Siu-Fung Leung & Swapnadeep Poddar & Yu Fu & Zhiyong Fan, 2019. "Efficient metal halide perovskite light-emitting diodes with significantly improved light extraction on nanophotonic substrates," Nature Communications, Nature, vol. 10(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-08561-y
    DOI: 10.1038/s41467-019-08561-y
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