Synergistic Cosensitization and Redox-Triggered Interfacial Engineering for Efficient and Durable Solar Cells

Achieving long-term stability along with high power conversion efficiency (PCE) remains a critical challenge for dye-sensitized solar cells (DSCs). Herein, we report a synergistic strategy that combines cosensitization and redox-active interfacial engineering to enhance the performance and durabilit...

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Autores: Wu, Heng, Marín Moncusí, Laia, Perez Hernandez, Javier, Martinez-Ferrero, Eugenia, Palomares, Emilio
Tipo de recurso: artículo
Fecha de publicación:2026
País:España
Institución:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repositorio:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:dnet:recercat____::6fc3c146893aa2090c0d0dd4dccf95c5
Acceso en línea:https://hdl.handle.net/2072/489509
https://doi.org/10.1021/acsami.6c01394
Access Level:acceso abierto
Palabra clave:Química
54
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spelling Synergistic Cosensitization and Redox-Triggered Interfacial Engineering for Efficient and Durable Solar CellsWu, HengMarín Moncusí, LaiaPerez Hernandez, JavierMartinez-Ferrero, EugeniaPalomares, EmilioQuímica54Achieving long-term stability along with high power conversion efficiency (PCE) remains a critical challenge for dye-sensitized solar cells (DSCs). Herein, we report a synergistic strategy that combines cosensitization and redox-active interfacial engineering to enhance the performance and durability of DSC. A narrow-energy-gap sensitizer (H4) is paired with a complementary blue-light-absorbing dye (H15), which possesses a strong absorption at ∼410 nm and a prolonged excited-state lifetime, thereby compensating for the spectral response and reducing interfacial charge recombination in cografted titania films. Simultaneously, we introduce a hypervalent iodine(III) compound, 1-acetoxy-1,2-benziodoxol-3(1H)-one (IBA), into a cobalt-based electrolyte. Initially, the introduction of IBA facilitates fast oxidation of the triphenylamine electron donor in H4, generating free radicals and enhancing intramolecular charge transfer. Importantly, the redox byproduct 2-iodobenzoic acid (IA) plays a critical role in suppressing interfacial recombination and passivation by coordinating with lithium ion and forming halogen-bonded complexes with electrolyte additives. The synergistic effects of cosensitization and the IBA additive in the electrolyte yield a cosensitized DSC with a PCE of 12.84%, featuring excellent operational stability under indoor light soaking for 1000 h. Moreover, the control device achieves an efficiency of 25.81% when tested under indoor light (4500 lx) illumination.info:eu-repo/semantics/publishedVersionACS Publications2026info:eu-repo/semantics/article11 p.application/pdfhttps://hdl.handle.net/2072/489509https://doi.org/10.1021/acsami.6c01394RECERCAT (Dipòsit de la Recerca de Catalunya)reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésSpanish Government (Ministerio de Ciencia e Innovación Severo Ochoa Excellence Accreditation CEX2024-001469-S funded by MCIU/AEI/10.13039/501100011033 and PID2022-139866NB-I00)European Union, as part of the ERC Advanced grant ERC-101097684-ExcitedH.W. acknowledges financial support from the Natural Science Foundation of Hainan Province (521QN239)L.M.M. acknowledges financial support from the MINECO predoctoral fellowship (PREP2022-000271)CERCA Program/Generalitat de CatalunyaICREA FoundationICIQ FoundationAttribution 4.0 Internationalhttp://creativecommons.org/licenses/by/4.0/info:eu-repo/semantics/openAccessoai:dnet:recercat____::6fc3c146893aa2090c0d0dd4dccf95c52026-05-29T05:05:01Z
dc.title.none.fl_str_mv Synergistic Cosensitization and Redox-Triggered Interfacial Engineering for Efficient and Durable Solar Cells
title Synergistic Cosensitization and Redox-Triggered Interfacial Engineering for Efficient and Durable Solar Cells
spellingShingle Synergistic Cosensitization and Redox-Triggered Interfacial Engineering for Efficient and Durable Solar Cells
Wu, Heng
Química
54
title_short Synergistic Cosensitization and Redox-Triggered Interfacial Engineering for Efficient and Durable Solar Cells
title_full Synergistic Cosensitization and Redox-Triggered Interfacial Engineering for Efficient and Durable Solar Cells
title_fullStr Synergistic Cosensitization and Redox-Triggered Interfacial Engineering for Efficient and Durable Solar Cells
title_full_unstemmed Synergistic Cosensitization and Redox-Triggered Interfacial Engineering for Efficient and Durable Solar Cells
title_sort Synergistic Cosensitization and Redox-Triggered Interfacial Engineering for Efficient and Durable Solar Cells
dc.creator.none.fl_str_mv Wu, Heng
Marín Moncusí, Laia
Perez Hernandez, Javier
Martinez-Ferrero, Eugenia
Palomares, Emilio
author Wu, Heng
author_facet Wu, Heng
Marín Moncusí, Laia
Perez Hernandez, Javier
Martinez-Ferrero, Eugenia
Palomares, Emilio
author_role author
author2 Marín Moncusí, Laia
Perez Hernandez, Javier
Martinez-Ferrero, Eugenia
Palomares, Emilio
author2_role author
author
author
author
dc.subject.none.fl_str_mv Química
54
topic Química
54
description Achieving long-term stability along with high power conversion efficiency (PCE) remains a critical challenge for dye-sensitized solar cells (DSCs). Herein, we report a synergistic strategy that combines cosensitization and redox-active interfacial engineering to enhance the performance and durability of DSC. A narrow-energy-gap sensitizer (H4) is paired with a complementary blue-light-absorbing dye (H15), which possesses a strong absorption at ∼410 nm and a prolonged excited-state lifetime, thereby compensating for the spectral response and reducing interfacial charge recombination in cografted titania films. Simultaneously, we introduce a hypervalent iodine(III) compound, 1-acetoxy-1,2-benziodoxol-3(1H)-one (IBA), into a cobalt-based electrolyte. Initially, the introduction of IBA facilitates fast oxidation of the triphenylamine electron donor in H4, generating free radicals and enhancing intramolecular charge transfer. Importantly, the redox byproduct 2-iodobenzoic acid (IA) plays a critical role in suppressing interfacial recombination and passivation by coordinating with lithium ion and forming halogen-bonded complexes with electrolyte additives. The synergistic effects of cosensitization and the IBA additive in the electrolyte yield a cosensitized DSC with a PCE of 12.84%, featuring excellent operational stability under indoor light soaking for 1000 h. Moreover, the control device achieves an efficiency of 25.81% when tested under indoor light (4500 lx) illumination.
publishDate 2026
dc.date.none.fl_str_mv 2026
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv https://hdl.handle.net/2072/489509
https://doi.org/10.1021/acsami.6c01394
url https://hdl.handle.net/2072/489509
https://doi.org/10.1021/acsami.6c01394
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Spanish Government (Ministerio de Ciencia e Innovación Severo Ochoa Excellence Accreditation CEX2024-001469-S funded by MCIU/AEI/10.13039/501100011033 and PID2022-139866NB-I00)
European Union, as part of the ERC Advanced grant ERC-101097684-Excited
H.W. acknowledges financial support from the Natural Science Foundation of Hainan Province (521QN239)
L.M.M. acknowledges financial support from the MINECO predoctoral fellowship (PREP2022-000271)
CERCA Program/Generalitat de Catalunya
ICREA Foundation
ICIQ Foundation
dc.rights.none.fl_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 11 p.
application/pdf
dc.publisher.none.fl_str_mv ACS Publications
publisher.none.fl_str_mv ACS Publications
dc.source.none.fl_str_mv RECERCAT (Dipòsit de la Recerca de Catalunya)
reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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