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    Defect and Contact Passivation for Perovskite Solar Cells

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    eaydin-ADV-Revised.pdf
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    Type
    Article
    Authors
    Aydin, Erkan
    de Bastiani, Michele
    De Wolf, Stefaan cc
    KAUST Department
    KAUST Solar Center (KSC)
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    KAUST Grant Number
    OSR-CARF URF/1/3079-33-01
    Date
    2019-05-07
    Permanent link to this record
    http://hdl.handle.net/10754/652896
    
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    Abstract
    Metal-halide perovskites are rapidly emerging as an important class of photovoltaic absorbers that may enable high-performance solar cells at affordable cost. Thanks to the appealing optoelectronic properties of these materials, tremendous progress has been reported in the last few years in terms of power conversion efficiencies (PCE) of perovskite solar cells (PSCs), now with record values in excess of 24%. Nevertheless, the crystalline lattice of perovskites often includes defects, such as interstitials, vacancies, and impurities; at the grain boundaries and surfaces, dangling bonds can also be present, which all contribute to nonradiative recombination of photo-carriers. On device level, such recombination undesirably inflates the open-circuit voltage deficit, acting thus as a significant roadblock toward the theoretical efficiency limit of 30%. Herein, the focus is on the origin of the various voltage-limiting mechanisms in PSCs, and possible mitigation strategies are discussed. Contact passivation schemes and the effect of such methods on the reduction of hysteresis are described. Furthermore, several strategies that demonstrate how passivating contacts can increase the stability of PSCs are elucidated. Finally, the remaining key challenges in contact design are prioritized and an outlook on how passivating contacts will contribute to further the progress toward market readiness of high-efficiency PSCs is presented.
    Citation
    Aydin E, Bastiani M, Wolf S (2019) Defect and Contact Passivation for Perovskite Solar Cells. Advanced Materials: 1900428. Available: http://dx.doi.org/10.1002/adma.201900428.
    Sponsors
    This study was supported by funding from King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under award no. OSR-CARF URF/1/3079-33-01. Figures 3 and 8a were created by Heno Hwang, scientific illustrator at KAUST.
    Publisher
    Wiley
    Journal
    Advanced Materials
    DOI
    10.1002/adma.201900428
    Additional Links
    https://onlinelibrary.wiley.com/doi/full/10.1002/adma.201900428
    ae974a485f413a2113503eed53cd6c53
    10.1002/adma.201900428
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; KAUST Solar Center (KSC)

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