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Infrared Cavity-Enhanced Colloidal Quantum Dot Photovoltaics Employing Asymmetric Multilayer Electrodes
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    Infrared Cavity-Enhanced Colloidal Quantum Dot Photovoltaics Employing Asymmetric Multilayer Electrodes
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    • Se-Woong Baek
      Se-Woong Baek
      Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, Canada
      Graduate School of Energy, Environment, Water, and Sustainability (EEWS), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
    • Olivier Ouellette
      Olivier Ouellette
      Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, Canada
    • Jea Woong Jo
      Jea Woong Jo
      Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, Canada
      More by Jea Woong Jo
    • Jongmin Choi
      Jongmin Choi
      Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, Canada
      More by Jongmin Choi
    • Ki-Won Seo
      Ki-Won Seo
      Graduate School of Energy, Environment, Water, and Sustainability (EEWS), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
      More by Ki-Won Seo
    • Junghwan Kim
      Junghwan Kim
      Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, Canada
      More by Junghwan Kim
    • Bin Sun
      Bin Sun
      Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, Canada
      More by Bin Sun
    • Sang-Hoon Lee
      Sang-Hoon Lee
      Graduate School of Energy, Environment, Water, and Sustainability (EEWS), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
    • Min-Jae Choi
      Min-Jae Choi
      Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, Canada
      More by Min-Jae Choi
    • Dae-Hyun Nam
      Dae-Hyun Nam
      Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, Canada
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    • Li Na Quan
      Li Na Quan
      Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, Canada
      More by Li Na Quan
    • Juhoon Kang
      Juhoon Kang
      Graduate School of Energy, Environment, Water, and Sustainability (EEWS), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
      More by Juhoon Kang
    • Sjoerd Hoogland
      Sjoerd Hoogland
      Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, Canada
    • F. Pelayo García de Arquer
      F. Pelayo García de Arquer
      Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, Canada
    • Jung-Yong Lee*
      Jung-Yong Lee
      Graduate School of Energy, Environment, Water, and Sustainability (EEWS), Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
      *E-mail: [email protected] (J.-Y.L.).
    • Edward. H Sargent*
      Edward. H Sargent
      Department of Electrical and Computer Engineering, University of Toronto, 10 King’s College Road, Toronto, Ontario M5S 3G4, Canada
      *E-mail: [email protected] (E.H.S.)
    Other Access OptionsSupporting Information (1)

    ACS Energy Letters

    Cite this: ACS Energy Lett. 2018, 3, 12, 2908–2913
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acsenergylett.8b01878
    Published November 7, 2018
    Copyright © 2018 American Chemical Society

    Abstract

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    Efficient infrared (IR) optoelectronic devices, crucial for emerging sensing applications and also for solar energy harvesting, demand high-conductivity IR-transparent electrodes. Here we present a new strategy, one based on oxide/metal/oxide multilayers, that enables highly transparent IR electrodes. Symmetry breaking in the oxide stack leads to broad and high transmittance from visible to IR wavelengths, while a low refractive index doped oxide as a front layer boosts IR transmittance. The combination of doped oxide and ultrathin metal film allows for low sheet resistance while maintaining IR transparency. We engineer the IR microcavity effect using the asymmetric multilayer approach to tailor the distribution of incident radiation to maximize IR absorption in the colloidal quantum dot (CQD) layer. As a result, the absorption-enhanced IR CQD solar cells exhibit a photoelectric conversion efficiency of 70% at a wavelength of 1.25 μm, i.e., well within the spectral range in which silicon is blind.

    Copyright © 2018 American Chemical Society

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    Supporting Information

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    The Supporting Information is available free of charge on the ACS Publications website at DOI: 10.1021/acsenergylett.8b01878.

    • Experimental section, TMF calculation results, refractive index of each material, transmittance of IMZ electrode, figure of merit for AIRT vs the sheet resistance, and solar cell performance as a function of the ZnO thickness (PDF)

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    Cited By

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    Citation Statements
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    This article is cited by 22 publications.

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    ACS Energy Letters

    Cite this: ACS Energy Lett. 2018, 3, 12, 2908–2913
    Click to copy citationCitation copied!
    https://doi.org/10.1021/acsenergylett.8b01878
    Published November 7, 2018
    Copyright © 2018 American Chemical Society

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