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    Pure Cs4PbBr6: Highly Luminescent Zero-Dimensional Perovskite Solids

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    Type
    Article
    Authors
    Saidaminov, Makhsud I. cc
    Almutlaq, Jawaher cc
    Sarmah, Smritakshi P.
    Dursun, Ibrahim cc
    Zhumekenov, Ayan A.
    Begum, Raihana
    Pan, Jun cc
    Cho, Nam Chul
    Mohammed, Omar F. cc
    Bakr, Osman cc
    KAUST Department
    Chemical Science Program
    Functional Nanomaterials Lab (FuNL)
    KAUST Catalysis Center (KCC)
    KAUST Solar Center (KSC)
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Ultrafast Laser Spectroscopy and Four-dimensional Electron Imaging Research Group
    Date
    2016-09-29
    Online Publication Date
    2016-09-29
    Print Publication Date
    2016-10-14
    Permanent link to this record
    http://hdl.handle.net/10754/623102
    
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    Abstract
    So-called zero-dimensional perovskites, such as Cs4PbBr6, promise outstanding emissive properties. However, Cs4PbBr6 is mostly prepared by melting of precursors that usually leads to a coformation of undesired phases. Here, we report a simple low-temperature solution-processed synthesis of pure Cs4PbBr6 with remarkable emission properties. We found that pure Cs4PbBr6 in solid form exhibits a 45% photoluminescence quantum yield (PLQY), in contrast to its three-dimensional counterpart, CsPbBr3, which exhibits more than 2 orders of magnitude lower PLQY. Such a PLQY of Cs4PbBr6 is significantly higher than that of other solid forms of lower-dimensional metal halide perovskite derivatives and perovskite nanocrystals. We attribute this dramatic increase in PL to the high exciton binding energy, which we estimate to be ∼353 meV, likely induced by the unique Bergerhoff–Schmitz–Dumont-type crystal structure of Cs4PbBr6, in which metal-halide-comprised octahedra are spatially confined. Our findings bring this class of perovskite derivatives to the forefront of color-converting and light-emitting applications.
    Citation
    Saidaminov MI, Almutlaq J, Sarmah S, Dursun I, Zhumekenov AA, et al. (2016) Pure Cs4PbBr6: Highly Luminescent Zero-Dimensional Perovskite Solids. ACS Energy Letters 1: 840–845. Available: http://dx.doi.org/10.1021/acsenergylett.6b00396.
    Sponsors
    The authors acknowledge the support of King Abdullah University of Science and Technology (KAUST).
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Energy Letters
    DOI
    10.1021/acsenergylett.6b00396
    Additional Links
    http://pubs.acs.org/doi/full/10.1021/acsenergylett.6b00396
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsenergylett.6b00396
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Chemical Science Program; Material Science and Engineering Program; KAUST Catalysis Center (KCC); KAUST Solar Center (KSC)

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