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    Colloidal Quantum Dot Photovoltaics Enhanced by Perovskite Shelling

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    Type
    Article
    Authors
    Yang, Zhenyu
    Janmohamed, Alyf
    Lan, Xinzheng
    de Arquer, F. Pelayo Garcia
    Voznyy, Oleksandr
    Yassitepe, Emre
    Kim, Gi-Hwan
    Ning, Zhijun
    Gong, Xiwen
    Comin, Riccardo
    Sargent, Edward H.
    KAUST Grant Number
    KUS-11-009-21
    Date
    2015
    Permanent link to this record
    http://hdl.handle.net/10754/673111
    
    Metadata
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    Abstract
    Solution-processed quantum dots are a promising material for large-scale, low-cost solar cell applications. New device architectures and improved passivation have been instrumental in increasing the performance of quantum dot photovoltaic devices. Here we report photovoltaic devices based on inks of quantum dot on which we grow thin perovskite shells in solid-state films. Passivation using the perovskite was achieved using a facile solution ligand exchange followed by postannealing. The resulting hybrid nanostructure created a more intrinsic CQD film, which, when incorporated into a photovoltaic device with graded bandstructure, achieved a record solar cell performance for single-step-deposited CQD films, exhibiting an AM1.5 solar power conversion efficiency of 8.95%.
    Citation
    Yang, Z., Janmohamed, A., Lan, X., García de Arquer, F. P., Voznyy, O., Yassitepe, E., … Sargent, E. H. (2015). Colloidal Quantum Dot Photovoltaics Enhanced by Perovskite Shelling. Nano Letters, 15(11), 7539–7543. doi:10.1021/acs.nanolett.5b03271
    Sponsors
    This publication is based in part on supported by Award KUS-11-009-21, from King Abdullah University of Science and Technology (KAUST), by the Ontario Research Fund Research Excellence Program, by the Natural Sciences and Engineering Research Council (NSERC) of Canada, and by the International Cooperation of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korea government Ministry of Knowledge Economy (2012T100100740). A.J. thanks NSERC for Undergraduate Student Research Award Funding. E.Y. acknowledges support from FAPESP-BEPE fellowship (2014/18327-9). The authors thank E. Palmiano, L. Levina, R. Wolowiec, and D. Kopilovic for helpful discussions.
    Publisher
    AMER CHEMICAL SOC
    Journal
    NANO LETTERS
    DOI
    10.1021/acs.nanolett.5b03271
    Additional Links
    https://pubs.acs.org/doi/10.1021/acs.nanolett.5b03271
    ae974a485f413a2113503eed53cd6c53
    10.1021/acs.nanolett.5b03271
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