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    Self-Patterned CsPbBr3 Nanocrystals for High-Performance Optoelectronics

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    Type
    Article
    Authors
    Xin, Bin cc
    Pak, Yusin
    Mitra, Somak cc
    Almalawi, Dhaifallah
    Alwadai, Norah M. cc
    Zhang, Yuhai
    Roqan, Iman S. cc
    KAUST Department
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    Semiconductor and Material Spectroscopy (SMS) Laboratory
    KAUST Grant Number
    BAS/1/1319-01-01
    Date
    2019-01-08
    Online Publication Date
    2019-01-08
    Print Publication Date
    2019-02-06
    Permanent link to this record
    http://hdl.handle.net/10754/630884
    
    Metadata
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    Abstract
    All-inorganic lead halide perovskites are promising materials for many optoelectronic applications. However, two issues that arise during device fabrication hinder their practical use, namely inadequate continuity of coated inorganic perovskite films across large areas and inability to integrate these films with traditional photolithography due to poor adhesion to wafers. Herein, for the first time, to address these issues, we show a room-temperature synthesis process employed to produce of CsPbBr3 perovskite nanocrystals with two-dimensional (2D) nanosheet features. Due to the unique properties of these 2D nanocrystals, including the “self-assembly” characteristic, and “double solvent evaporation induced self-patterning” strategy are used to generate high-quality patterned thin films in selected areas automatically after-drop-casting, enabling fabrication of high-performance devices without using complex and expensive fabrication processing techniques. The films are free from micro-cracks. In a proof-of-concept experiment, photodetector arrays are used to demonstrate the superior properties of such films. We provide evidence of both high responsivity (9.04 A/W) and high stability across large areas. The photodetectors fabricated on flexible substrate exhibit outstanding photo-response stability. Advanced optical and structural studies reveal the possible mechanism. Our simple and cost-effective method paves the way for the next-generation nanotechnology based on high-performance, cost-effective optoelectronic devices.
    Citation
    Xin B, Pak Y, Mitra S, Almalawi D, Alwadai N, et al. (2019) Self-Patterned CsPbBr3 Nanocrystals for High-Performance Optoelectronics. ACS Applied Materials & Interfaces. Available: http://dx.doi.org/10.1021/acsami.8b17249.
    Sponsors
    B. X. and Y. P. contributed equally to this study and share first authorship. The authors gratefully acknowledge financial support by the King Abdullah University of Science and Technology (KAUST) baseline funding (BAS/1/1319-01-01) and Y. Z. is grateful to the seeding fund from University of Jinan, and National Science Foundation for Young Scientists of China (Grant No. 21805111).
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Applied Materials & Interfaces
    DOI
    10.1021/acsami.8b17249
    Additional Links
    https://pubs.acs.org/doi/abs/10.1021%2Facsami.8b17249
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsami.8b17249
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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