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Chemical doping to control the in-situ formed doping structure in light-emitting electrochemical cells

The initial operation of a light-emitting electrochemical cell (LEC) constitutes the in-situ formation of a p–n junction doping structure in the active material by electrochemical doping. It has been firmly established that the spatial position of the emissive p–n junction in the interelectrode gap...

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Autores principales: Huseynova, Gunel, Ràfols-Ribé, Joan, Auroux, Etienne, Huang, Ping, Tang, Shi, Larsen, Christian, Edman, Ludvig
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2023
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10349809/
https://www.ncbi.nlm.nih.gov/pubmed/37454107
http://dx.doi.org/10.1038/s41598-023-38006-y
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author Huseynova, Gunel
Ràfols-Ribé, Joan
Auroux, Etienne
Huang, Ping
Tang, Shi
Larsen, Christian
Edman, Ludvig
author_facet Huseynova, Gunel
Ràfols-Ribé, Joan
Auroux, Etienne
Huang, Ping
Tang, Shi
Larsen, Christian
Edman, Ludvig
author_sort Huseynova, Gunel
collection PubMed
description The initial operation of a light-emitting electrochemical cell (LEC) constitutes the in-situ formation of a p–n junction doping structure in the active material by electrochemical doping. It has been firmly established that the spatial position of the emissive p–n junction in the interelectrode gap has a profound influence on the LEC performance because of exciton quenching and microcavity effects. Hence, practical strategies for a control of the position of the p–n junction in LEC devices are highly desired. Here, we introduce a “chemical pre-doping” approach for the rational shifting of the p–n junction for improved performance. Specifically, we demonstrate, by combined experiments and simulations, that the addition of a strong chemical reductant termed “reduced benzyl viologen” to a common active-material ink during LEC fabrication results in a filling of deep electron traps and an associated shifting of the emissive p–n junction from the center of the active material towards the positive anode. We finally demonstrate that this chemical pre-doping approach can improve the emission efficiency and stability of a common LEC device.
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spelling pubmed-103498092023-07-17 Chemical doping to control the in-situ formed doping structure in light-emitting electrochemical cells Huseynova, Gunel Ràfols-Ribé, Joan Auroux, Etienne Huang, Ping Tang, Shi Larsen, Christian Edman, Ludvig Sci Rep Article The initial operation of a light-emitting electrochemical cell (LEC) constitutes the in-situ formation of a p–n junction doping structure in the active material by electrochemical doping. It has been firmly established that the spatial position of the emissive p–n junction in the interelectrode gap has a profound influence on the LEC performance because of exciton quenching and microcavity effects. Hence, practical strategies for a control of the position of the p–n junction in LEC devices are highly desired. Here, we introduce a “chemical pre-doping” approach for the rational shifting of the p–n junction for improved performance. Specifically, we demonstrate, by combined experiments and simulations, that the addition of a strong chemical reductant termed “reduced benzyl viologen” to a common active-material ink during LEC fabrication results in a filling of deep electron traps and an associated shifting of the emissive p–n junction from the center of the active material towards the positive anode. We finally demonstrate that this chemical pre-doping approach can improve the emission efficiency and stability of a common LEC device. Nature Publishing Group UK 2023-07-15 /pmc/articles/PMC10349809/ /pubmed/37454107 http://dx.doi.org/10.1038/s41598-023-38006-y Text en © The Author(s) 2023 https://creativecommons.org/licenses/by/4.0/Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) .
spellingShingle Article
Huseynova, Gunel
Ràfols-Ribé, Joan
Auroux, Etienne
Huang, Ping
Tang, Shi
Larsen, Christian
Edman, Ludvig
Chemical doping to control the in-situ formed doping structure in light-emitting electrochemical cells
title Chemical doping to control the in-situ formed doping structure in light-emitting electrochemical cells
title_full Chemical doping to control the in-situ formed doping structure in light-emitting electrochemical cells
title_fullStr Chemical doping to control the in-situ formed doping structure in light-emitting electrochemical cells
title_full_unstemmed Chemical doping to control the in-situ formed doping structure in light-emitting electrochemical cells
title_short Chemical doping to control the in-situ formed doping structure in light-emitting electrochemical cells
title_sort chemical doping to control the in-situ formed doping structure in light-emitting electrochemical cells
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10349809/
https://www.ncbi.nlm.nih.gov/pubmed/37454107
http://dx.doi.org/10.1038/s41598-023-38006-y
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