umu.sePublications
Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Oligomer Electrolytes for Light-Emitting Electrochemical Cells: Influence of the End Groups on Ion Coordination, Ion Binding, and Turn-on Kinetics
Umeå University, Faculty of Science and Technology, Department of Physics.ORCID iD: 0000-0002-1903-9875
Umeå University, Faculty of Science and Technology, Department of Physics.ORCID iD: 0000-0003-2495-7037
Show others and affiliations
2019 (English)In: ACS Applied Materials and Interfaces, ISSN 1944-8244, E-ISSN 1944-8252, Vol. 11, no 43, p. 40372-40381Article in journal (Refereed) Published
Abstract [en]

The electrolyte is an essential constituent of the light-emitting electrochemical cell (LEC), since its operating mechanism is dependent on the redistribution of mobile ions in the active layer. Recent developments of new ion transporters have yielded high-performance devices, but knowledge about the interactions between the ionic species and the ion transporters and the influence of these interactions on the LEC performance is lacking. We therefore present a combined computational and experimental effort that demonstrates that the selection of the end group in a star-branched oligomeric ion transporter based on trimethylolpropane ethoxylate has a paramount influence on the ionic interactions in the electrolyte and thereby also on the performance of the corresponding LECs. With hydroxyl end groups, the the salt is strongly coordinated to the ion transporter, which leads to suppression of ion pairing, but the penalty is a hindered ion release and a slow turn-on for the LEC devices. With methoxy end groups, an intermediate coordination strength is seen together with the formation of contact ion pairs, but the LEC performance is very good with fast turn-on. Using a series of ion transporters with alkyl carbonate end groups, the ion transporter:cation coordination strength is lowered further, but the turn-on kinetics are slower than what is seen for devices comprising the methoxy end-capped ion transporter.

Place, publisher, year, edition, pages
American Chemical Society (ACS), 2019. Vol. 11, no 43, p. 40372-40381
Keywords [en]
light-emitting electrochemical cells, polymer electrolytes, coordination, binding energy, ion pairing
National Category
Polymer Chemistry
Identifiers
URN: urn:nbn:se:umu:diva-165349DOI: 10.1021/acsami.9b15233ISI: 000493869700099PubMedID: 31621280OAI: oai:DiVA.org:umu-165349DiVA, id: diva2:1373006
Funder
Lars Hierta Memorial FoundationeSSENCE - An eScience CollaborationSwedish Foundation for Strategic Research Swedish Research CouncilSwedish Energy AgencyAvailable from: 2019-11-26 Created: 2019-11-26 Last updated: 2019-11-26Bibliographically approved

Open Access in DiVA

No full text in DiVA

Other links

Publisher's full textPubMed

Authority records BETA

Lindh, E. MattiasEdman, Ludvig

Search in DiVA

By author/editor
Lindh, E. MattiasThordarson, PallEdman, LudvigMindemark, Jonas
By organisation
Department of Physics
In the same journal
ACS Applied Materials and Interfaces
Polymer Chemistry

Search outside of DiVA

GoogleGoogle Scholar

doi
pubmed
urn-nbn

Altmetric score

doi
pubmed
urn-nbn
Total: 35 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf