Enhanced Open-Circuit Voltage in Colloidal Quantum Dot Photovoltaics via Reactivity-Controlled Solution-Phase Ligand Exchange

Handle URI:
http://hdl.handle.net/10754/626077
Title:
Enhanced Open-Circuit Voltage in Colloidal Quantum Dot Photovoltaics via Reactivity-Controlled Solution-Phase Ligand Exchange
Authors:
Jo, Jea Woong; Kim, Younghoon; Choi, Jongmin; de Arquer, F. Pelayo García; Walters, Grant; Sun, Bin; Ouellette, Olivier; Kim, Junghwan; Proppe, Andrew H.; Quintero-Bermudez, Rafael; Fan, James; Xu, Jixian; Tan, Chih Shan; Voznyy, Oleksandr; Sargent, Edward H.
Abstract:
The 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.
Citation:
Jo 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.
Publisher:
Wiley-Blackwell
Journal:
Advanced Materials
KAUST Grant Number:
OSR-2017-CPF-3325
Issue Date:
9-Oct-2017
DOI:
10.1002/adma.201703627
Type:
Article
ISSN:
0935-9648
Sponsors:
J.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.
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Full metadata record

DC FieldValue Language
dc.contributor.authorJo, Jea Woongen
dc.contributor.authorKim, Younghoonen
dc.contributor.authorChoi, Jongminen
dc.contributor.authorde Arquer, F. Pelayo Garcíaen
dc.contributor.authorWalters, Granten
dc.contributor.authorSun, Binen
dc.contributor.authorOuellette, Olivieren
dc.contributor.authorKim, Junghwanen
dc.contributor.authorProppe, Andrew H.en
dc.contributor.authorQuintero-Bermudez, Rafaelen
dc.contributor.authorFan, Jamesen
dc.contributor.authorXu, Jixianen
dc.contributor.authorTan, Chih Shanen
dc.contributor.authorVoznyy, Oleksandren
dc.contributor.authorSargent, Edward H.en
dc.date.accessioned2017-11-01T08:19:11Z-
dc.date.available2017-11-01T08:19:11Z-
dc.date.issued2017-10-09en
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.en
dc.identifier.issn0935-9648en
dc.identifier.doi10.1002/adma.201703627en
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.en
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.en
dc.publisherWiley-Blackwellen
dc.titleEnhanced Open-Circuit Voltage in Colloidal Quantum Dot Photovoltaics via Reactivity-Controlled Solution-Phase Ligand Exchangeen
dc.typeArticleen
dc.identifier.journalAdvanced Materialsen
dc.contributor.institutionDepartment of Electrical and Computer Engineering; University of Toronto; 10 King's College Road Toronto Ontario M5S 3G4 Canadaen
kaust.grant.numberOSR-2017-CPF-3325en
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