• Login
    View Item 
    •   Home
    • Office of Sponsored Research (OSR)
    • KAUST Funded Research
    • Publications Acknowledging KAUST Support
    • View Item
    •   Home
    • Office of Sponsored Research (OSR)
    • KAUST Funded Research
    • Publications Acknowledging KAUST Support
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Browse

    All of KAUSTCommunitiesIssue DateSubmit DateThis CollectionIssue DateSubmit Date

    My Account

    Login

    Quick Links

    Open Access PolicyORCID LibguideTheses and Dissertations LibguideSubmit an Item

    Statistics

    Display statistics

    A Charge-Orbital Balance Picture of Doping in Colloidal Quantum Dot Solids

    • CSV
    • RefMan
    • EndNote
    • BibTex
    • RefWorks
    Type
    Article
    Authors
    Voznyy, Oleksandr cc
    Zhitomirsky, David
    Stadler, Philipp
    Ning, Zhijun
    Hoogland, Sjoerd
    Sargent, Edward H. cc
    KAUST Grant Number
    KUS-11-009-21
    Date
    2012-09-07
    Online Publication Date
    2012-09-07
    Print Publication Date
    2012-09-25
    Permanent link to this record
    http://hdl.handle.net/10754/597229
    
    Metadata
    Show full item record
    Abstract
    We present a framework-validated using both modeling and experiment-to predict doping in CQD films. In the ionic semiconductors widely deployed in CQD films, the framework reduces to a simple accounting of the contributions of the oxidation state of each constituent, including both inorganic species and organic ligands. We use density functional theory simulations to confirm that the type of doping can be reliably predicted based on the overall stoichiometry of the CQDs, largely independent of microscopic geometrical bonding configurations. Studies employing field-effect transistors constructed from CQDs that have undergone various chemical treatments, coupled with Rutherford backscattering and X-ray photoelectron spectroscopy to provide compositional analysis, allow us to test and confirm the proposed model in an experimental framework. We investigate both p- and n-type electronic doping spanning a wide range of carrier concentrations from 10 16 cm -3 to over 10 18 cm -3, and demonstrate reversible switching between p- and n-type doping by changing the CQD stoichiometry. We show that the summation of the contributions from all cations and anions within the film can be used to predict accurately the majority carrier type. The findings enable predictable control over majority carrier concentration via tuning of the overall stoichiometry. © 2012 American Chemical Society.
    Citation
    Voznyy O, Zhitomirsky D, Stadler P, Ning Z, Hoogland S, et al. (2012) A Charge-Orbital Balance Picture of Doping in Colloidal Quantum Dot Solids. ACS Nano 6: 8448–8455. Available: http://dx.doi.org/10.1021/nn303364d.
    Sponsors
    This publication is based in part on work supported by Award KUS-11-009-21, made by King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program, and by the Natural Sciences and Engineering Research Council (NSERC) of Canada. David Zhitomirsky would like to acknowledge his NSERC CGS D scholarship. We thank Angstrom Engineering, Inc. and Innovative Technology, Inc. for useful discussions regarding material deposition methods and control of the glovebox environment, respectively. We thank Lyudmila Goncharova for help in RBS measurements and Mark Greiner for help in XPS measurements. We thank Larissa Levina for PbS COD synthesis and Melissa Furukawa for FET measurements. Computations were performed on the GPC supercomputer at the SciNet<SUP>49</SUP> HPC Consortium. SciNet is funded by the Canada Foundation for Innovation under the auspices of Compute Canada, the Government of Ontario, Ontario Research Fund-Research Excellence, and the University of Toronto.
    Publisher
    American Chemical Society (ACS)
    Journal
    ACS Nano
    DOI
    10.1021/nn303364d
    PubMed ID
    22928602
    ae974a485f413a2113503eed53cd6c53
    10.1021/nn303364d
    Scopus Count
    Collections
    Publications Acknowledging KAUST Support

    entitlement

    Related articles

    • Measuring charge carrier diffusion in coupled colloidal quantum dot solids.
    • Authors: Zhitomirsky D, Voznyy O, Hoogland S, Sargent EH
    • Issue date: 2013 Jun 25
    • Joint mapping of mobility and trap density in colloidal quantum dot solids.
    • Authors: Stadler P, Sutherland BR, Ren Y, Ning Z, Simchi A, Thon SM, Hoogland S, Sargent EH
    • Issue date: 2013 Jul 23
    • Role of bond adaptability in the passivation of colloidal quantum dot solids.
    • Authors: Thon SM, Ip AH, Voznyy O, Levina L, Kemp KW, Carey GH, Masala S, Sargent EH
    • Issue date: 2013 Sep 24
    • Depleted-heterojunction colloidal quantum dot solar cells.
    • Authors: Pattantyus-Abraham AG, Kramer IJ, Barkhouse AR, Wang X, Konstantatos G, Debnath R, Levina L, Raabe I, Nazeeruddin MK, Grätzel M, Sargent EH
    • Issue date: 2010 Jun 22
    • Hybrid passivated colloidal quantum dot solids.
    • Authors: Ip AH, Thon SM, Hoogland S, Voznyy O, Zhitomirsky D, Debnath R, Levina L, Rollny LR, Carey GH, Fischer A, Kemp KW, Kramer IJ, Ning Z, Labelle AJ, Chou KW, Amassian A, Sargent EH
    • Issue date: 2012 Sep
    DSpace software copyright © 2002-2023  DuraSpace
    Quick Guide | Contact Us | KAUST University Library
    Open Repository is a service hosted by 
    Atmire NV
     

    Export search results

    The export option will allow you to export the current search results of the entered query to a file. Different formats are available for download. To export the items, click on the button corresponding with the preferred download format.

    By default, clicking on the export buttons will result in a download of the allowed maximum amount of items. For anonymous users the allowed maximum amount is 50 search results.

    To select a subset of the search results, click "Selective Export" button and make a selection of the items you want to export. The amount of items that can be exported at once is similarly restricted as the full export.

    After making a selection, click one of the export format buttons. The amount of items that will be exported is indicated in the bubble next to export format.