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    PTCDI-Ph Molecular Layer Stack-Based Highly Crystalline Microneedles As Single-Component Efficient Photodetector

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    Type
    Article
    Authors
    Pal, Arindam
    Gedda, Murali cc
    Goswami, Dipak K. cc
    KAUST Department
    KAUST Solar Center (KSC)
    Date
    2022-03-11
    Embargo End Date
    2023-03-11
    Permanent link to this record
    http://hdl.handle.net/10754/676462
    
    Metadata
    Show full item record
    Abstract
    Phenyl-substituted perylene diimide derivative N,N-diphenyl perylene tetracarboxylic diimide (PTCDI-Ph) has been used as a single-component organic material to fabricate an efficient photodetector. PTCDI-Ph grows as one-dimensional microneedles composed of stacks of molecular layers with substrate temperatures. Such structure formation is due to the lower diffusion activation energy (0.21 eV) of the molecules along the length of the microneedles than along the width (0.34 eV). The photoresponse from these structures has been significantly enhanced because of the reduction of traps as a result of enhanced diffusion of the molecules at higher substrate temperatures. The observed photosensitivity and photoresponse time of the devices fabricated with the films grown at a 140 °C substrate temperature are 333 and 0.12 s, respectively. The decrement of the traps due to the defect states with the increment of substrate temperature is confirmed by the photoluminescence (PL) and time-resolved photoluminescence spectra (TRPL). The photocurrent covers the visible-light spectrum, indicating that the PTCDI-Ph microneedle is a promising candidate for the fabrication of single-material-based photodetectors.
    Citation
    Pal, A., Gedda, M., & Goswami, D. K. (2022). PTCDI-Ph Molecular Layer Stack-Based Highly Crystalline Microneedles As Single-Component Efficient Photodetector. ACS Applied Electronic Materials. https://doi.org/10.1021/acsaelm.1c01068
    Sponsors
    The authors acknowledge IIT Guwahati and CIF facilities for extending support to carry out the experiments.
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Applied Electronic Materials
    DOI
    10.1021/acsaelm.1c01068
    Additional Links
    https://pubs.acs.org/doi/10.1021/acsaelm.1c01068
    ae974a485f413a2113503eed53cd6c53
    10.1021/acsaelm.1c01068
    Scopus Count
    Collections
    Articles; KAUST Solar Center (KSC)

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