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    Monolayer Perovskite Bridges Enable Strong Quantum Dot Coupling for Efficient Solar Cells

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    Accepted manuscript
    Embargo End Date:
    2021-06-09
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    Type
    Article
    Authors
    Sun, Bin
    Johnston, Andrew
    Xu, Chao
    Wei, Mingyang
    Huang, Ziru
    Jiang, Zhang
    Zhou, Hua
    Gao, Yajun
    Dong, Yitong
    Ouellette, Olivier
    Zheng, Xiaopeng
    Liu, Jiakai cc
    Choi, Min Jae
    Gao, Yuan
    Baek, Se Woong
    Laquai, Frédéric cc
    Bakr, Osman cc
    Ban, Dayan
    Voznyy, Oleksandr
    García de Arquer, F. Pelayo
    Sargent, Edward H.
    KAUST Department
    Functional Nanomaterials Lab (FuNL)
    KAUST Catalysis Center (KCC)
    KAUST Solar Center (KSC)
    Material Science and Engineering
    Material Science and Engineering Program
    Physical Science and Engineering (PSE) Division
    KAUST Grant Number
    OSR-2018-CARF/CCF-3079
    Date
    2020-06-09
    Online Publication Date
    2020-06-09
    Print Publication Date
    2020-07
    Embargo End Date
    2021-06-09
    Submitted Date
    2020-02-05
    Permanent link to this record
    http://hdl.handle.net/10754/663992
    
    Metadata
    Show full item record
    Abstract
    Solution-processed colloidal quantum dots (CQDs) are promising optoelectronic materials; however, CQD solids have, to date, exhibited either excellent transport properties but fusion among CQDs or limited transport when QDs are strongly passivated. Here, we report the growth of monolayer perovskite bridges among quantum dots and show that this enables the union of surface passivation with improved charge transport. We grow the perovskite layer after forming the CQD solid rather than introducing perovskite precursors into the quantum dot solution: the monolayer of perovskite increases interdot coupling and decreases the distance over which carriers must tunnel. As a result, we double the diffusion length relative to reference CQD solids and report solar cells that achieve a stabilized power conversion efficiency (PCE) of 13.8%, a record among Pb chalcogenide CQD solar cells.
    Citation
    Sun, B., Johnston, A., Xu, C., Wei, M., Huang, Z., Jiang, Z., … Sargent, E. H. (2020). Monolayer Perovskite Bridges Enable Strong Quantum Dot Coupling for Efficient Solar Cells. Joule. doi:10.1016/j.joule.2020.05.011
    Sponsors
    This work was supported by Ontario Research Fund-Research Excellence program (ORF7-Ministry of Research and Innovation, Ontario Research Fund-Research Excellence Round 7), and by the King Abdullah University of Science and Technology (KAUST) Office of Sponsored Research (OSR) under award no. OSR-2018-CRG7-373702 and award no. OSR-2018-CARF/CCF-3079. This work used resources of the Advanced Photon Source, a U.S. Department of Energy (DOE) Office of Science User Facility operated for the DOE Office of Science by Argonne National Laboratory under contract no. DE-AC02-06CH11357. We thank A.R. Kirmani for GISAXS and GIWAXS discussions. We thank L. Goncharova for assistance with RBS measurements. We thank A.H. Proppe, L. Chiluka, Y. Hou, M. Biondi, Y. Wang, M. Vafaei, and G. Bappi for manuscript discussion. We thank D. Kopilovic, E. Palmiano, L. Levina, and R. Wolowiec for technical support. B.S. conceived the idea of this study; B.S. developed the perovskite monolayer CQD system, fabricated and characterized solar cell devices, and performed SIMS and materials stability tests; O.V. assisted in RBS measurements and analysis; M.W. assisted in the fabrication of quantum dot in matrix samples and absorption and photoluminescence measurements; A.J. Y.G. and F.L. carried out transient absorption measurements and data analysis; Z.J. and H.Z. carried out GISAXS and GIWAXS measurements; X.Z. J.L. O.M.B. and Y.G. assisted the HRTEM measurements; C.X. and D.B. carried out the TRTS measurement and mobility extraction; M.-J.C. performed SEM imaging measurements; Y.D. assisted in 2PTA measurement; S.-W.B assisted device preparation for certification; and F.P.G.d.A. and E.H.S. supervised the project. B.S. A.J. F.P.G.d.A. and E.H.S. wrote the manuscript, and all authors discussed the results and assisted in the preparation of the manuscript. The authors declare no competing interests.
    Publisher
    Elsevier BV
    Journal
    Joule
    DOI
    10.1016/j.joule.2020.05.011
    Additional Links
    https://linkinghub.elsevier.com/retrieve/pii/S2542435120302294
    ae974a485f413a2113503eed53cd6c53
    10.1016/j.joule.2020.05.011
    Scopus Count
    Collections
    Articles; Physical Science and Engineering (PSE) Division; Material Science and Engineering Program; KAUST Catalysis Center (KCC); KAUST Solar Center (KSC)

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