High-Efficiency Colloidal Quantum Dot Photovoltaics via Robust Self-Assembled Monolayers

Handle URI:
http://hdl.handle.net/10754/598487
Title:
High-Efficiency Colloidal Quantum Dot Photovoltaics via Robust Self-Assembled Monolayers
Authors:
Kim, Gi-Hwan; García de Arquer, F. Pelayo; Yoon, Yung Jin; Lan, Xinzheng; Liu, Mengxia; Voznyy, Oleksandr; Yang, Zhenyu; Fan, Fengjia; Ip, Alexander H.; Kanjanaboos, Pongsakorn; Hoogland, Sjoerd; Kim, Jin Young; Sargent, Edward H.
Abstract:
© 2015 American Chemical Society. The optoelectronic tunability offered by colloidal quantum dots (CQDs) is attractive for photovoltaic applications but demands proper band alignment at electrodes for efficient charge extraction at minimal cost to voltage. With this goal in mind, self-assembled monolayers (SAMs) can be used to modify interface energy levels locally. However, to be effective SAMs must be made robust to treatment using the various solvents and ligands required for to fabricate high quality CQD solids. We report robust self-assembled monolayers (R-SAMs) that enable us to increase the efficiency of CQD photovoltaics. Only by developing a process for secure anchoring of aromatic SAMs, aided by deposition of the SAMs in a water-free deposition environment, were we able to provide an interface modification that was robust against the ensuing chemical treatments needed in the fabrication of CQD solids. The energy alignment at the rectifying interface was tailored by tuning the R-SAM for optimal alignment relative to the CQD quantum-confined electron energy levels. This resulted in a CQD PV record power conversion efficiency (PCE) of 10.7% with enhanced reproducibility relative to controls.
Citation:
Kim G-H, García de Arquer FP, Yoon YJ, Lan X, Liu M, et al. (2015) High-Efficiency Colloidal Quantum Dot Photovoltaics via Robust Self-Assembled Monolayers. Nano Lett 15: 7691–7696. Available: http://dx.doi.org/10.1021/acs.nanolett.5b03677.
Publisher:
American Chemical Society (ACS)
Journal:
Nano Letters
KAUST Grant Number:
KUS-11-009-21
Issue Date:
11-Nov-2015
DOI:
10.1021/acs.nanolett.5b03677
PubMed ID:
26509283
Type:
Article
ISSN:
1530-6984; 1530-6992
Sponsors:
This publication is based in part on work supported by Award KUS-11-009-21, made by 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). We thank Emre Yassitepe and Cao-Thang Dinh for helpful discussions. We also thank E. Palmiano, L. Levina, A. Labelle, R. Wolowiec, and D. Kopilovic for their help over the course of this study.
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Full metadata record

DC FieldValue Language
dc.contributor.authorKim, Gi-Hwanen
dc.contributor.authorGarcía de Arquer, F. Pelayoen
dc.contributor.authorYoon, Yung Jinen
dc.contributor.authorLan, Xinzhengen
dc.contributor.authorLiu, Mengxiaen
dc.contributor.authorVoznyy, Oleksandren
dc.contributor.authorYang, Zhenyuen
dc.contributor.authorFan, Fengjiaen
dc.contributor.authorIp, Alexander H.en
dc.contributor.authorKanjanaboos, Pongsakornen
dc.contributor.authorHoogland, Sjoerden
dc.contributor.authorKim, Jin Youngen
dc.contributor.authorSargent, Edward H.en
dc.date.accessioned2016-02-25T13:30:51Zen
dc.date.available2016-02-25T13:30:51Zen
dc.date.issued2015-11-11en
dc.identifier.citationKim G-H, García de Arquer FP, Yoon YJ, Lan X, Liu M, et al. (2015) High-Efficiency Colloidal Quantum Dot Photovoltaics via Robust Self-Assembled Monolayers. Nano Lett 15: 7691–7696. Available: http://dx.doi.org/10.1021/acs.nanolett.5b03677.en
dc.identifier.issn1530-6984en
dc.identifier.issn1530-6992en
dc.identifier.pmid26509283en
dc.identifier.doi10.1021/acs.nanolett.5b03677en
dc.identifier.urihttp://hdl.handle.net/10754/598487en
dc.description.abstract© 2015 American Chemical Society. The optoelectronic tunability offered by colloidal quantum dots (CQDs) is attractive for photovoltaic applications but demands proper band alignment at electrodes for efficient charge extraction at minimal cost to voltage. With this goal in mind, self-assembled monolayers (SAMs) can be used to modify interface energy levels locally. However, to be effective SAMs must be made robust to treatment using the various solvents and ligands required for to fabricate high quality CQD solids. We report robust self-assembled monolayers (R-SAMs) that enable us to increase the efficiency of CQD photovoltaics. Only by developing a process for secure anchoring of aromatic SAMs, aided by deposition of the SAMs in a water-free deposition environment, were we able to provide an interface modification that was robust against the ensuing chemical treatments needed in the fabrication of CQD solids. The energy alignment at the rectifying interface was tailored by tuning the R-SAM for optimal alignment relative to the CQD quantum-confined electron energy levels. This resulted in a CQD PV record power conversion efficiency (PCE) of 10.7% with enhanced reproducibility relative to controls.en
dc.description.sponsorshipThis publication is based in part on work supported by Award KUS-11-009-21, made by 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). We thank Emre Yassitepe and Cao-Thang Dinh for helpful discussions. We also thank E. Palmiano, L. Levina, A. Labelle, R. Wolowiec, and D. Kopilovic for their help over the course of this study.en
dc.publisherAmerican Chemical Society (ACS)en
dc.subjectdipole momenten
dc.subjecthigh performanceen
dc.subjectinterfaceen
dc.subjectQuantum dot solar cellsen
dc.subjectR-SAMen
dc.subjectrobusten
dc.titleHigh-Efficiency Colloidal Quantum Dot Photovoltaics via Robust Self-Assembled Monolayersen
dc.typeArticleen
dc.identifier.journalNano Lettersen
dc.contributor.institutionUniversity of Toronto, Toronto, Canadaen
dc.contributor.institutionUlsan National Institute of Science and Technology, Ulsan, South Koreaen
kaust.grant.numberKUS-11-009-21en

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