Switchable dissociation of excitons bound at strained CdTe/CdS interfaces

Lade...
Vorschaubild
Dateien
Zu diesem Dokument gibt es keine Dateien.
Datum
2018
Autor:innen
Zeng, Peng
Lauth, Jannika
Smith, Trevor A.
Herausgeber:innen
Kontakt
ISSN der Zeitschrift
Electronic ISSN
ISBN
Bibliografische Daten
Verlag
Schriftenreihe
Auflagebezeichnung
URI (zitierfähiger Link)
DOI (zitierfähiger Link)
ArXiv-ID
Internationale Patentnummer
Angaben zur Forschungsförderung
Projekt
Open Access-Veröffentlichung
Core Facility der Universität Konstanz
Gesperrt bis
Titel in einer weiteren Sprache
Forschungsvorhaben
Organisationseinheiten
Zeitschriftenheft
Publikationstyp
Zeitschriftenartikel
Publikationsstatus
Published
Erschienen in
Nanoscale. 2018, 10(47), pp. 22362-22373. ISSN 2040-3364. eISSN 2040-3372. Available under: doi: 10.1039/C8NR07973K
Zusammenfassung

Charge carrier dynamics of semiconductor nano-heterostructures are determined by band alignment and lattice mismatch of the adjacent materials. However, quantum efficiencies for the separation of excited charge carriers at such an interface are hard to predict and cannot yet be easily controlled. In this work we examine nanorods with a severely strained, axial CdTe/CdS interface using femtosecond transient absorption spectroscopy. We show that charge separation is mitigated by equal contributions of valence band distortion and formation of coulomb pairs across the interface. Left undisturbed such localised excitons relax rapidly via non-radiative recombination channels. By adding a competitive hole acceptor that disrupts the coulomb interaction we overcome the synergetic co-localisation of the carriers and realise charge separation. The thus created long-lived state can be exploited for a broad range of applications such as photocatalysis, water splitting, and switchable nanodevices.

Zusammenfassung in einer weiteren Sprache
Fachgebiet (DDC)
540 Chemie
Schlagwörter
Konferenz
Rezension
undefined / . - undefined, undefined
Zitieren
ISO 690ENDERS, Florian, Arne BUDWEG, Peng ZENG, Jannika LAUTH, Trevor A. SMITH, Daniele BRIDA, Klaus BOLDT, 2018. Switchable dissociation of excitons bound at strained CdTe/CdS interfaces. In: Nanoscale. 2018, 10(47), pp. 22362-22373. ISSN 2040-3364. eISSN 2040-3372. Available under: doi: 10.1039/C8NR07973K
BibTex
@article{Enders2018-12-06Switc-44326,
  year={2018},
  doi={10.1039/C8NR07973K},
  title={Switchable dissociation of excitons bound at strained CdTe/CdS interfaces},
  number={47},
  volume={10},
  issn={2040-3364},
  journal={Nanoscale},
  pages={22362--22373},
  author={Enders, Florian and Budweg, Arne and Zeng, Peng and Lauth, Jannika and Smith, Trevor A. and Brida, Daniele and Boldt, Klaus}
}
RDF
<rdf:RDF
    xmlns:dcterms="http://purl.org/dc/terms/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:bibo="http://purl.org/ontology/bibo/"
    xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#"
    xmlns:foaf="http://xmlns.com/foaf/0.1/"
    xmlns:void="http://rdfs.org/ns/void#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > 
  <rdf:Description rdf:about="https://kops.uni-konstanz.de/server/rdf/resource/123456789/44326">
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dc:creator>Lauth, Jannika</dc:creator>
    <dcterms:title>Switchable dissociation of excitons bound at strained CdTe/CdS interfaces</dcterms:title>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/41"/>
    <dc:creator>Enders, Florian</dc:creator>
    <dc:contributor>Enders, Florian</dc:contributor>
    <dc:creator>Brida, Daniele</dc:creator>
    <dc:creator>Boldt, Klaus</dc:creator>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/29"/>
    <dcterms:abstract xml:lang="eng">Charge carrier dynamics of semiconductor nano-heterostructures are determined by band alignment and lattice mismatch of the adjacent materials. However, quantum efficiencies for the separation of excited charge carriers at such an interface are hard to predict and cannot yet be easily controlled. In this work we examine nanorods with a severely strained, axial CdTe/CdS interface using femtosecond transient absorption spectroscopy. We show that charge separation is mitigated by equal contributions of valence band distortion and formation of coulomb pairs across the interface. Left undisturbed such localised excitons relax rapidly via non-radiative recombination channels. By adding a competitive hole acceptor that disrupts the coulomb interaction we overcome the synergetic co-localisation of the carriers and realise charge separation. The thus created long-lived state can be exploited for a broad range of applications such as photocatalysis, water splitting, and switchable nanodevices.</dcterms:abstract>
    <dc:contributor>Lauth, Jannika</dc:contributor>
    <dc:contributor>Boldt, Klaus</dc:contributor>
    <dc:contributor>Budweg, Arne</dc:contributor>
    <dc:creator>Budweg, Arne</dc:creator>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2018-12-14T12:58:32Z</dc:date>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2018-12-14T12:58:32Z</dcterms:available>
    <bibo:uri rdf:resource="https://kops.uni-konstanz.de/handle/123456789/44326"/>
    <dc:language>eng</dc:language>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/52"/>
    <dc:contributor>Zeng, Peng</dc:contributor>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/29"/>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <dc:contributor>Brida, Daniele</dc:contributor>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/52"/>
    <dc:creator>Zeng, Peng</dc:creator>
    <dc:creator>Smith, Trevor A.</dc:creator>
    <dcterms:issued>2018-12-06</dcterms:issued>
    <dc:contributor>Smith, Trevor A.</dc:contributor>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
  </rdf:Description>
</rdf:RDF>
Interner Vermerk
xmlui.Submission.submit.DescribeStep.inputForms.label.kops_note_fromSubmitter
Kontakt
URL der Originalveröffentl.
Prüfdatum der URL
Prüfungsdatum der Dissertation
Finanzierungsart
Kommentar zur Publikation
Allianzlizenz
Corresponding Authors der Uni Konstanz vorhanden
Internationale Co-Autor:innen
Universitätsbibliographie
Ja
Begutachtet
Ja
Diese Publikation teilen