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Efficient silicon light-emitting diodes

Author

Listed:
  • Martin A. Green

    (University of New South Wales)

  • Jianhua Zhao

    (University of New South Wales)

  • Aihua Wang

    (University of New South Wales)

  • Peter J. Reece

    (University of New South Wales)

  • Michael Gal

    (University of New South Wales)

Abstract

Considerable effort is being expended on the development of efficient silicon light-emitting devices compatible with silicon-based integrated circuit technology1. Although several approaches are being explored1,2,3,4,5,6, all presently suffer from low emission efficiencies, with values in the 0.01–0.1% range regarded as high2. Here we report a large increase in silicon light-emitting diode power conversion efficiency to values above 1% near room temperature—close to the values of representative direct bandgap emitters of a little more than a decade ago7,8. Our devices are based on normally weak one- and two-phonon assisted sub-bandgap light-emission processes. Their design takes advantage of the reciprocity between light absorption and emission by maximizing absorption at relevant sub-bandgap wavelengths while reducing the scope for parasitic non-radiative recombination within the diode. Each feature individually is shown to improve the emission efficiency by a factor of ten, which accounts for the improvement by a factor of one hundred on the efficiency of baseline devices.

Suggested Citation

  • Martin A. Green & Jianhua Zhao & Aihua Wang & Peter J. Reece & Michael Gal, 2001. "Efficient silicon light-emitting diodes," Nature, Nature, vol. 412(6849), pages 805-808, August.
    • Handle: RePEc:nat:nature:v:412:y:2001:i:6849:d:10.1038_35090539
    DOI: 10.1038/35090539
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    Cited by:

    1. Datas, Alejandro & Ramos, Alba & Martí, Antonio & del Cañizo, Carlos & Luque, Antonio, 2016. "Ultra high temperature latent heat energy storage and thermophotovoltaic energy conversion," Energy, Elsevier, vol. 107(C), pages 542-549.
    2. Yuuki Sugano & Keisuke Sato & Naoki Fukata & Kenji Hirakuri, 2017. "Improved Separation and Collection of Charge Carriers in Micro-Pyramidal-Structured Silicon/PEDOT:PSS Hybrid Solar Cells," Energies, MDPI, vol. 10(4), pages 1-13, March.

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