Monolayer Perovskite Bridges Enable Strong Quantum Dot Coupling for Efficient Solar Cells
Type
ArticleAuthors
Sun, BinJohnston, Andrew
Xu, Chao
Wei, Mingyang
Huang, Ziru
Jiang, Zhang
Zhou, Hua
Gao, Yajun
Dong, Yitong
Ouellette, Olivier
Zheng, Xiaopeng
Liu, Jiakai

Choi, Min Jae
Gao, Yuan
Baek, Se Woong
Laquai, Frédéric

Bakr, Osman

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-3079Date
2020-06-09Online Publication Date
2020-06-09Print Publication Date
2020-07Embargo End Date
2021-06-09Submitted Date
2020-02-05Permanent link to this record
http://hdl.handle.net/10754/663992
Metadata
Show full item recordAbstract
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.2020.05.011Sponsors
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 BVJournal
JouleAdditional Links
https://linkinghub.elsevier.com/retrieve/pii/S2542435120302294ae974a485f413a2113503eed53cd6c53
10.1016/j.joule.2020.05.011