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The role of surface passivation for efficient and photostable PbS quantum dot solar cells

Author

Listed:
  • Yiming Cao

    (ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology)

  • Alexandros Stavrinadis

    (ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology)

  • Tania Lasanta

    (ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology)

  • David So

    (ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology)

  • Gerasimos Konstantatos

    (ICFO-Institut de Ciencies Fotoniques, The Barcelona Institute of Science and Technology
    ICREA-Institució Catalana de Recerca i Estudis Avançats)

Abstract

For any emerging photovoltaic technology to become commercially relevant, both its power conversion efficiency and photostability are key parameters to be fulfilled. Colloidal quantum dot solar cells are a solution-processed, low-cost technology that has reached an efficiency of about 9% by judiciously controlling the surface of the quantum dots to enable surface passivation and tune energy levels. However, the role of the quantum dot surface on the stability of these solar cells has remained elusive. Here we report on highly efficient and photostable quantum dot solar cells with efficiencies of 9.6% (and independently certificated values of 8.7%). As a result of optimized surface passivation and the suppression of hydroxyl ligands—which are found to be detrimental for both efficiency and photostability—the efficiency remains within 80% of its initial value after 1,000 h of continuous illumination at AM1.5G. Our findings provide insights into the role of the quantum dot surface in both the stability and efficiency of quantum dot solar cells.

Suggested Citation

  • Yiming Cao & Alexandros Stavrinadis & Tania Lasanta & David So & Gerasimos Konstantatos, 2016. "The role of surface passivation for efficient and photostable PbS quantum dot solar cells," Nature Energy, Nature, vol. 1(4), pages 1-6, April.
    • Handle: RePEc:nat:natene:v:1:y:2016:i:4:d:10.1038_nenergy.2016.35
    DOI: 10.1038/nenergy.2016.35
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    Cited by:

    1. Lingju Meng & Xihua Wang, 2022. "Doping Colloidal Quantum Dot Materials and Devices for Photovoltaics," Energies, MDPI, vol. 15(7), pages 1-29, March.
    2. Akihiro Takahashi & Haibin Wang & Takeshi Fukuda & Norihiko Kamata & Takaya Kubo & Hiroshi Segawa, 2020. "Annealing-Temperature Dependent Carrier-Transportation in ZnO/PbS Quantum Dot Solar Cells Fabricated Using Liquid-Phase Ligand Exchange Methods," Energies, MDPI, vol. 13(19), pages 1-11, September.

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