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    Impact of Cation Multiplicity on Halide Perovskite Defect Densities and Solar Cell Voltages

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    Name:
    JPCC ML02.pdf
    Size:
    2.273Mb
    Format:
    PDF
    Description:
    Accepted manuscript
    Embargo End Date:
    2021-12-08
    Download
    Type
    Article
    Authors
    Ledinský, Martin cc
    Vlk, Aleš
    Schönfeldová, Tereza
    Holovský, Jakub
    Aydin, Erkan cc
    Dang, Hoang X.
    Hájková, Zdeňka
    Landová, Lucie
    Valenta, Jan
    Fejfar, Antonín
    De Wolf, Stefaan cc
    KAUST Department
    Physical Science and Engineering (PSE) Division
    KAUST Solar Center (KSC), King Abdullah University of Science and Technology (KAUST), Thuwal 23955, Saudi Arabia
    Material Science and Engineering Program
    KAUST Solar Center (KSC)
    KAUST Grant Number
    OSR-CARF URF/1/3079-33-01
    Date
    2020-12-08
    Embargo End Date
    2021-12-08
    Submitted Date
    2020-09-08
    Permanent link to this record
    http://hdl.handle.net/10754/666398
    
    Metadata
    Show full item record
    Abstract
    Metal-halide perovskites feature very low deep-defect densities, thereby enabling high operating voltages at the solar cell level. Here, by precise extraction of their absorption spectra, we find that the low deep-defect density is unaffected when cations such as Cs+ and Rb+ are added during the perovskite synthesis. By comparing single crystals and polycrystalline thin films of methylammonium lead iodide/bromide, we find these defects to be predominantly localized at surfaces and grain boundaries. Furthermore, generally, for the most important photovoltaic materials, we demonstrate a strong correlation between their Urbach energy and open-circuit voltage deficiency at the solar cell level. Through external quantum yield photoluminescence efficiency measurements, we explain these results as a consequence of nonradiative open-circuit voltage losses in the solar cell. Finally, we define practical power conversion efficiency limits of solar cells by taking into account the Urbach energy.
    Citation
    Ledinský, M., Vlk, A., Schönfeldová, T., Holovský, J., Aydin, E., Dang, H. X., … De Wolf, S. (2020). Impact of Cation Multiplicity on Halide Perovskite Defect Densities and Solar Cell Voltages. The Journal of Physical Chemistry C. doi:10.1021/acs.jpcc.0c08193
    Sponsors
    The authors acknowledge the support of the Czech Science Foundation (Project No. 17-26041Y), Operational Programme Research, Development, and Education financed by the European Structural and Investment Funds and the Czech Ministry of Education, Youth and Sports (Project No. CZ.02.1.01/0.0/0.0/16_019/0000760SOLID21 and CzechNanoLab Research Infrastructure LM2018110). E.A., H.X.D., and S.D.W. acknowledge financial support under Award No. OSR-CARF URF/1/3079-33-01 by King Abdullah University of Science and Technology (KAUST). J.V. acknowledges support from the Charles University Research Centre (UNCE/SCI/010).
    Publisher
    American Chemical Society (ACS)
    Journal
    The Journal of Physical Chemistry C
    DOI
    10.1021/acs.jpcc.0c08193
    Additional Links
    https://pubs.acs.org/doi/10.1021/acs.jpcc.0c08193
    ae974a485f413a2113503eed53cd6c53
    10.1021/acs.jpcc.0c08193
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; KAUST Solar Center (KSC)

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