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    Surface Effect on 2D Hybrid Perovskite Crystals: Perovskites Using an Ethanolamine Organic Layer as an Example

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    Type
    Article
    Authors
    Ho, Kang-Ting cc
    Leung, Siu
    Li, Ting-You cc
    Maity, Partha
    Cheng, Bin
    Fu, Hui-Chun cc
    Mohammed, Omar F. cc
    He, Jr-Hau cc
    KAUST Department
    Chemical Science Program
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Computer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
    Electrical Engineering Program
    KAUST Solar Center (KSC)
    Nano Energy Lab
    Physical Science and Engineering (PSE) Division
    Ultrafast Laser Spectroscopy and Four-dimensional Electron Imaging Research Group
    Date
    2018-10-01
    Online Publication Date
    2018-10-01
    Print Publication Date
    2018-11
    Permanent link to this record
    http://hdl.handle.net/10754/630574
    
    Metadata
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    Abstract
    Despite the remarkable progress of optoelectronic devices based on hybrid perovskites, there are significant drawbacks, which have largely hindered their development as an alternative of silicon. For instance, hybrid perovskites are well-known to suffer from moisture instability which leads to surface degradation. Nonetheless, the dependence of the surface effect on the moisture stability and optoelectronic properties of hybrid perovskites has not been fully investigated. In this work, the influence of the surface effect of 2D layered perovskites before and after mechanical exfoliation, representing rough and smooth surfaces of perovskite crystals, are studied. It is found that the smooth 2D perovskite is less sensitive to ambient moisture and exhibits a considerably low dark current, which outperforms the rough perovskites by 23.6 times in terms of photodetectivity. The superior moisture stability of the smooth perovskites over the rough perovskites is demonstrated. Additionally, ethanolamine is employed as an organic linker of the 2D layered perovskite, which further improves the moisture stability. This work reveals the strong dependence of the surface conditions of 2D hybrid perovskite crystals on their moisture stability and optoelectronic properties, which are of utmost importance to the design of practical optoelectronic devices based on hybrid perovskite crystals.
    Citation
    Ho K-T, Leung S-F, Li T-Y, Maity P, Cheng B, et al. (2018) Surface Effect on 2D Hybrid Perovskite Crystals: Perovskites Using an Ethanolamine Organic Layer as an Example. Advanced Materials 30: 1804372. Available: http://dx.doi.org/10.1002/adma.201804372.
    Sponsors
    K.T.H. and S.F.L. contributed equally to this work. This work was financially supported by the Office of Sponsored Research of King Abdullah University of Science and Technology (KAUST), KAUST Sensor Initiativ, KAUST Solar Center, and KAUST baseline funding.
    Publisher
    Wiley
    Journal
    Advanced Materials
    DOI
    10.1002/adma.201804372
    Additional Links
    https://onlinelibrary.wiley.com/doi/full/10.1002/adma.201804372
    ae974a485f413a2113503eed53cd6c53
    10.1002/adma.201804372
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Electrical and Computer Engineering Program; Chemical Science Program; KAUST Solar Center (KSC); Computer, Electrical and Mathematical Science and Engineering (CEMSE) Division

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