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Band-gap tunable thiadiazolo[3,4-g]quinoxaline derivatives as non-fullerene acceptors in organic photovoltaic cells processed from low toxic ethanol/anisole mixtures

2019-09-28Journal article Restricted access
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dc.contributor.authorCosta, Cristiana
dc.contributor.authorFarinhas, Joana
dc.contributor.authorVelho, Mariana F. G.
dc.contributor.authorAvo, Joao
dc.contributor.authorMatos, Manuel
dc.contributor.authorGalvão, Adelino
dc.contributor.authorCharas, Ana
dc.date.accessioned2019-10-04T09:02:13Z
dc.date.available2019-10-04T09:02:13Z
dc.date.issued2019-09-28
dc.description.abstractThe synthesis, characterisation and application as electron-acceptors in organic photovoltaic cells of new [1,2,5]thiadiazolo[3,4-g]quinoxaline-based small molecules with oligo(ethylene oxide) solubilising groups and tunable optical bandgaps are reported. A new p-type polymer consisting of a polythiophene derivative substituted with analogous solubilising groups was also synthesised to perform as a donor, in combination with the small molecules, for bulk-heterojunction solar cells using ethanol/anisole mixtures as low toxic solvents to process the active blends. Comparison of the structural, electrochemical and photophysical properties of the small molecules elucidated on the structural dependence of their optical bandgaps, ranging from 1.31 to 2.25 eV. The active layers composed of the polythiophene donor and the small molecules showed well-intermixed morphologies, and the best performing blends showed a fibrillar-type morphology, indicative of more ordered molecular packings. Blends processed from the 50 : 50 (v/v) mixture of ethanol and a low toxic solvent, anisole, yielded low power conversion efficiencies of 0.39% in non-optimized organic solar cells. Although the efficiencies are low, these are the first reported results of OSCs with active layers composed of non-fullerene acceptors processed from ethanol-based solvent formulations. This study provides guidelines for the design of non-fullerene acceptors for the fabrication of OSCs processed from environmentally friendly solvents.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationCOSTA, Cristiana; [et al] – Band-gap tunable thiadiazolo[3,4-g]quinoxaline derivatives as non-fullerene acceptors in organic photovoltaic cells processed from low toxic ethanol/anisole mixtures. New Journal of Chemistry. ISSN 1144-0546. Vol. 43, N.º 36 (2019), pp. 14246-14256pt_PT
dc.identifier.doi10.1039/c9nj02419kpt_PT
dc.identifier.issn1144-0546
dc.identifier.issn1369-9261
dc.identifier.urihttp://hdl.handle.net/10400.21/10543
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherRoyal Society of Chemistrypt_PT
dc.relationLISBOA-01-0145-FEDER-028365-PTDC/QUI-QOR/28365/2017pt_PT
dc.relationUID/EEA/50008/2019 - FCTpt_PT
dc.relationUID/QUI/00100/2019 - FCTpt_PT
dc.relationPD/BD/113532/2015 - FCT/Portugalpt_PT
dc.relationSFRH/BPD/120599/2016 - FCT/Portugalpt_PT
dc.relation.publisherversionhttps://pubs.rsc.org/en/content/articlepdf/2019/nj/c9nj02419kpt_PT
dc.subjectElectron-acceptorspt_PT
dc.subjectOptical bandgapspt_PT
dc.subjectDonorpt_PT
dc.subjectPolythiophene donorpt_PT
dc.titleBand-gap tunable thiadiazolo[3,4-g]quinoxaline derivatives as non-fullerene acceptors in organic photovoltaic cells processed from low toxic ethanol/anisole mixturespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage14256pt_PT
oaire.citation.issue36pt_PT
oaire.citation.startPage14246pt_PT
oaire.citation.titleNew Journal of Chemistrypt_PT
oaire.citation.volume43pt_PT
person.familyNameFarinhas
person.familyNameAvo
person.familyNameMatos
person.familyNameGalvão
person.familyNameCharas
person.givenNameJoana
person.givenNameJoao
person.givenNameManuel
person.givenNameAdelino
person.givenNameAna
person.identifier.ciencia-idD019-7A2E-8095
person.identifier.ciencia-id9F1B-9D74-0CF6
person.identifier.ciencia-id2E14-6146-CC46
person.identifier.ciencia-id7316-791C-2285
person.identifier.ciencia-id2511-08B1-A99A
person.identifier.orcid0000-0003-4320-8998
person.identifier.orcid0000-0002-3380-748X
person.identifier.orcid0000-0002-5240-8070
person.identifier.orcid0000-0002-4740-0613
person.identifier.orcid0000-0001-6717-6826
person.identifier.ridH-7730-2012
person.identifier.scopus-author-id35588347400
person.identifier.scopus-author-id35497484900
person.identifier.scopus-author-id6602748474
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication2e9e571b-b5ad-41dc-8f1d-2693515c3ab2
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relation.isAuthorOfPublicationd72cc658-57a0-49f4-9ef3-384fed118bbf
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