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    3-D Modeling of Ultrathin Solar Cells with Nanostructured Dielectric Passivation: Case Study of Chalcogenide Solar Cells

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    adts202100191_corrected.pdf
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    2.620Mb
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    Description:
    Accepted manuscript
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    Type
    Article
    Authors
    Raja, Waseem cc
    Aydin, Erkan
    Allen, Thomas
    De Wolf, Stefaan cc
    KAUST Department
    Physical Science and Engineering (PSE) Division
    KAUST Solar Center (KSC)
    Material Science and Engineering Program
    KAUST Grant Number
    OSR-CARF URF/1/3079-33-01
    Date
    2021-09-09
    Online Publication Date
    2021-09-09
    Print Publication Date
    2021-11
    Embargo End Date
    2022-09-09
    Permanent link to this record
    http://hdl.handle.net/10754/671173
    
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    Abstract
    Ultrathin solar cells can be a path forward to low-cost photovoltaics due to their reduced material consumption and shorter required deposition times. With excellent surface passivation, such devices may feature higher open-circuit voltages (VOC). However, their short-circuit current density (JSC) may be reduced due to decreased light absorption. This mandates implementation of efficient light-trapping structures. To design efficient ultrathin solar cells that combine surface-passivation and light-trapping features, accurate 3-D modeling is necessary. To this end, a novel 3-D optoelectrical finite-element model is developed to analyze the performance of ultrathin solar cells. The model is applied to the case of ultrathin (<500 nm) chalcogenide solar cells (copper indium gallium (di) selenide, CIGSe), rear-passivated with nanostructured Al2O3 to circumvent optical and electrical losses. It is found that such a nanopatterned dielectric passivation scheme enhances broadband light-trapping with reduced rear-surface recombination, resulting in an absolute power conversion efficiency enhancement of 3.9%, compared to cells without passivation structure. Overall, the work shows how 3-D finite element modeling can aid in analyzing and developing new optical and electrical solar cell designs for ultrathin solar cells such as those based on chalcogenides and perovskites.
    Citation
    Raja, W., Aydin, E., Allen, T. G., & De Wolf, S. (2021). 3-D Modeling of Ultrathin Solar Cells with Nanostructured Dielectric Passivation: Case Study of Chalcogenide Solar Cells. Advanced Theory and Simulations, 2100191. doi:10.1002/adts.202100191
    Sponsors
    This work was supported by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under award no. OSR-CARF URF/1/3079-33-01.
    Publisher
    Wiley
    Journal
    Advanced Theory and Simulations
    DOI
    10.1002/adts.202100191
    Additional Links
    https://onlinelibrary.wiley.com/doi/10.1002/adts.202100191
    ae974a485f413a2113503eed53cd6c53
    10.1002/adts.202100191
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; KAUST Solar Center (KSC)

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