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    Halide Perovskites: Materials Properties and Emerging Applications

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    Name:
    Mohammed Azimul Haque - Dissertation - Final Draft.pdf
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    6.673Mb
    Format:
    PDF
    Description:
    Mohammed Azimul Haque - Dissertation - Final Draft
    Embargo End Date:
    2021-08-11
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    Type
    Dissertation
    Authors
    Haque, Mohammed cc
    Advisors
    Baran, Derya cc
    Committee members
    Alshareef, Husam N. cc
    Mohammed, Omar F. cc
    Saliba, Michael
    Program
    Material Science and Engineering
    KAUST Department
    Physical Science and Engineering (PSE) Division
    Date
    2020-08-11
    Embargo End Date
    2021-08-11
    Permanent link to this record
    http://hdl.handle.net/10754/664921
    
    Metadata
    Show full item record
    Access Restrictions
    At the time of archiving, the student author of this dissertation opted to temporarily restrict access to it. The full text of this dissertation will become available to the public after the expiration of the embargo on 2021-08-11.
    Abstract
    Semiconducting materials have emerged as the cornerstone of modern electronics owing to their extensive device applications. There is a continuous quest to find cost-effective and low-temperature compatible materials for future electronics. The recent reemergence of solution processable halide perovskites have taken the optoelectronics research to new paradigms. Apart from photovoltaics, the versatile characteristics of halide perovskites have resulted in a multitude of applications. This dissertation focuses on various properties and emerging applications particularly, photodetection and thermoelectrics of both hybrid and all-inorganic halide perovskites. It is important to understand the underlying properties of perovskites to further develop this class of materials. One of the major hurdles restricting the practical devices of perovskites is their sensitivity to moisture. A systematic investigation on the effect of humidity on hybrid perovskites revealed different degree of moisture uptake behaviour for micropatterns, films, and single crystals. Degradation pathways and processing limitations of hybrid perovskites are discussed which will aid in designing strategies to overcome these impediments for future large scale device integration. There is a recent surge of reports on doping hybrid perovskites to control its optoelectronic properties but in-depth understanding of these dopants and their ramifications remain unexplored. The effect of doping on the optoelectronic properties of hybrid perovskites is studied and a model is proposed for the observed behavior. Leveraging on the rapid growth of microcrystalline perovskite films, for the first time tunable bifacial perovskite photodetectors were fabricated, operating in both broadband and narrowband regimes. Furthermore, self-biased single crystalline photodetectors based on all-inorganic perovskite were developed with high on-off ratio and low dark current. Halide perovskites are emerging as a new class of materials for thermoelectric applications owing to their ultralow thermal conductivity and decent Seebeck coefficient. Here, halide perovskites are evaluated in terms of composition, stability, and performance tunability to understand their thermoelectric efficacy. Finally, as an alternative to Pb and Sn-based perovskites, a new hybrid was discovered with ultralow thermal conductivity and a general synthetic route to design such hybrids is proposed.
    Citation
    Haque, M. (2020). Halide Perovskites: Materials Properties and Emerging Applications. KAUST Research Repository. https://doi.org/10.25781/KAUST-5P7ST
    DOI
    10.25781/KAUST-5P7ST
    ae974a485f413a2113503eed53cd6c53
    10.25781/KAUST-5P7ST
    Scopus Count
    Collections
    Dissertations; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program

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