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dc.contributor.authorJo, Jea Woong
dc.contributor.authorKim, Younghoon
dc.contributor.authorChoi, Jongmin
dc.contributor.authorde Arquer, F. Pelayo García
dc.contributor.authorWalters, Grant
dc.contributor.authorSun, Bin
dc.contributor.authorOuellette, Olivier
dc.contributor.authorKim, Junghwan
dc.contributor.authorProppe, Andrew H.
dc.contributor.authorQuintero-Bermudez, Rafael
dc.contributor.authorFan, James
dc.contributor.authorXu, Jixian
dc.contributor.authorTan, Chih Shan
dc.contributor.authorVoznyy, Oleksandr
dc.contributor.authorSargent, Edward H.
dc.date.accessioned2017-11-01T08:19:11Z
dc.date.available2017-11-01T08:19:11Z
dc.date.issued2017-10-09
dc.identifier.citationJo JW, Kim Y, Choi J, de Arquer FPG, Walters G, et al. (2017) Enhanced Open-Circuit Voltage in Colloidal Quantum Dot Photovoltaics via Reactivity-Controlled Solution-Phase Ligand Exchange. Advanced Materials: 1703627. Available: http://dx.doi.org/10.1002/adma.201703627.
dc.identifier.issn0935-9648
dc.identifier.doi10.1002/adma.201703627
dc.identifier.urihttp://hdl.handle.net/10754/626077
dc.description.abstractThe energy disorder that arises from colloidal quantum dot (CQD) polydispersity limits the open-circuit voltage (VOC) and efficiency of CQD photovoltaics. This energy broadening is significantly deteriorated today during CQD ligand exchange and film assembly. Here, a new solution-phase ligand exchange that, via judicious incorporation of reactivity-engineered additives, provides improved monodispersity in final CQD films is reported. It has been found that increasing the concentration of the less reactive species prevents CQD fusion and etching. As a result, CQD solar cells with a VOC of 0.7 V (vs 0.61 V for the control) for CQD films with exciton peak at 1.28 eV and a power conversion efficiency of 10.9% (vs 10.1% for the control) is achieved.
dc.description.sponsorshipJ.W.J., Y.K., and J.C. contributed equally to this work. This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korea government (MSIP) (NRF-2016R1A6A3A03007170 and 2016R1A6A3A03009820), by Ontario Research Fund-Research Excellence program (ORF7-Ministry of Research and Innovation, Ontario Research Fund-Research Excellence Round 7), by King Abdullah University of Science and Technology (KAUST, Office of Sponsored Research (OSR), Award No. OSR-2017-CPF-3325), and by the Natural Sciences and Engineering Research Council (NSERC) of Canada. O.O. was financially supported by NSERC’s Postgraduate Scholarships-Doctoral program. The authors thank L. Levina, R. Wolowiec, D. Kopilovic, and E. Palmiano for their help over the course of this research.
dc.publisherWiley-Blackwell
dc.titleEnhanced Open-Circuit Voltage in Colloidal Quantum Dot Photovoltaics via Reactivity-Controlled Solution-Phase Ligand Exchange
dc.typeArticle
dc.identifier.journalAdvanced Materials
dc.contributor.institutionDepartment of Electrical and Computer Engineering; University of Toronto; 10 King's College Road Toronto Ontario M5S 3G4 Canada
kaust.grant.numberOSR-2017-CPF-3325


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