Selective contacts drive charge extraction in quantum dot solids via asymmetry in carrier transfer kinetics

Handle URI:
http://hdl.handle.net/10754/597008
Title:
Selective contacts drive charge extraction in quantum dot solids via asymmetry in carrier transfer kinetics
Authors:
Mora-Sero, Ivan; Bertoluzzi, Luca; Gonzalez-Pedro, Victoria; Gimenez, Sixto; Fabregat-Santiago, Francisco; Kemp, Kyle W.; Sargent, Edward H.; Bisquert, Juan
Abstract:
Colloidal quantum dot solar cells achieve spectrally selective optical absorption in a thin layer of solution-processed, size-effect tuned, nanoparticles. The best devices built to date have relied heavily on drift-based transport due to the action of an electric field in a depletion region that extends throughout the thickness of the quantum dot layer. Here we study for the first time the behaviour of the best-performing class of colloidal quantum dot films in the absence of an electric field, by screening using an electrolyte. We find that the action of selective contacts on photovoltage sign and amplitude can be retained, implying that the contacts operate by kinetic preferences of charge transfer for either electrons or holes. We develop a theoretical model to explain these experimental findings. The work is the first to present a switch in the photovoltage in colloidal quantum dot solar cells by purposefully formed selective contacts, opening the way to new strategies in the engineering of colloidal quantum dot solar cells. © 2013 Macmillan Publishers Limited. All rights reserved.
Citation:
Mora-Sero I, Bertoluzzi L, Gonzalez-Pedro V, Gimenez S, Fabregat-Santiago F, et al. (2013) Selective contacts drive charge extraction in quantum dot solids via asymmetry in carrier transfer kinetics. Nat Comms 4. Available: http://dx.doi.org/10.1038/ncomms3272.
Publisher:
Springer Nature
Journal:
Nature Communications
KAUST Grant Number:
KUS-11-009-21
Issue Date:
12-Aug-2013
DOI:
10.1038/ncomms3272
PubMed ID:
23934367
Type:
Article
ISSN:
2041-1723
Sponsors:
We thank the following agencies for support of this research: Ministerio de Educacion y Ciencia under project HOPE CSD2007-00007, Generalitat Valenciana (ISIC/2012/008) and Universitat Jaume I project 12I361.01/1. EHS and KWK acknowledge the Award KUS-11-009-21, made by King Abdullah University of Science and Technology (KAUST) and 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).
Appears in Collections:
Publications Acknowledging KAUST Support

Full metadata record

DC FieldValue Language
dc.contributor.authorMora-Sero, Ivanen
dc.contributor.authorBertoluzzi, Lucaen
dc.contributor.authorGonzalez-Pedro, Victoriaen
dc.contributor.authorGimenez, Sixtoen
dc.contributor.authorFabregat-Santiago, Franciscoen
dc.contributor.authorKemp, Kyle W.en
dc.contributor.authorSargent, Edward H.en
dc.contributor.authorBisquert, Juanen
dc.date.accessioned2016-02-23T13:52:22Zen
dc.date.available2016-02-23T13:52:22Zen
dc.date.issued2013-08-12en
dc.identifier.citationMora-Sero I, Bertoluzzi L, Gonzalez-Pedro V, Gimenez S, Fabregat-Santiago F, et al. (2013) Selective contacts drive charge extraction in quantum dot solids via asymmetry in carrier transfer kinetics. Nat Comms 4. Available: http://dx.doi.org/10.1038/ncomms3272.en
dc.identifier.issn2041-1723en
dc.identifier.pmid23934367en
dc.identifier.doi10.1038/ncomms3272en
dc.identifier.urihttp://hdl.handle.net/10754/597008en
dc.description.abstractColloidal quantum dot solar cells achieve spectrally selective optical absorption in a thin layer of solution-processed, size-effect tuned, nanoparticles. The best devices built to date have relied heavily on drift-based transport due to the action of an electric field in a depletion region that extends throughout the thickness of the quantum dot layer. Here we study for the first time the behaviour of the best-performing class of colloidal quantum dot films in the absence of an electric field, by screening using an electrolyte. We find that the action of selective contacts on photovoltage sign and amplitude can be retained, implying that the contacts operate by kinetic preferences of charge transfer for either electrons or holes. We develop a theoretical model to explain these experimental findings. The work is the first to present a switch in the photovoltage in colloidal quantum dot solar cells by purposefully formed selective contacts, opening the way to new strategies in the engineering of colloidal quantum dot solar cells. © 2013 Macmillan Publishers Limited. All rights reserved.en
dc.description.sponsorshipWe thank the following agencies for support of this research: Ministerio de Educacion y Ciencia under project HOPE CSD2007-00007, Generalitat Valenciana (ISIC/2012/008) and Universitat Jaume I project 12I361.01/1. EHS and KWK acknowledge the Award KUS-11-009-21, made by King Abdullah University of Science and Technology (KAUST) and 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).en
dc.publisherSpringer Natureen
dc.rightsOpen access articles are published under a CC BY license (Creative Commons Attribution 4.0 International License).en
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/en
dc.titleSelective contacts drive charge extraction in quantum dot solids via asymmetry in carrier transfer kineticsen
dc.typeArticleen
dc.identifier.journalNature Communicationsen
dc.contributor.institutionUniversidad Jaume I, Castellon de la Plana, Spainen
dc.contributor.institutionUniversity of Toronto, Toronto, Canadaen
kaust.grant.numberKUS-11-009-21en

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