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Synthesis and photophysical properties of tetraphenylethylene derivatives as luminescent downshifting materials for organic photovoltaic applications

2021-11Journal article Open access
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dc.contributor.authorBarros, Helio
dc.contributor.authorEsteves, M. Alexandra
dc.contributor.authorBrites, Maria João
dc.date.accessioned2022-01-04T17:56:18Z
dc.date.available2022-01-04T17:56:18Z
dc.date.issued2021-11
dc.description.abstractABSTRACT: Luminescent Down-Shifting (LDS) is an optical approach applied in several photovoltaic (PV) technologies in which high energy solar radiation is converted to a wavelength region where the response of the photovoltaic devices is better. The use of LDS layers on organic photovoltaics (OPV) could serve two purposes: to prevent cell degradation by filtering the incident ultraviolet (UV) radiation and to improve the spectral response of PV cells at short-wavelength. This work reports, the design and synthesis of a series of tetraphenylethylene (TPE) derivatives based on TPE-A or A-pi-TPE-pi-A molecular structure featuring various electron-acceptor (A) groups. The photo-physical properties of the new LDS compounds were systematically studied in 1,4-dioxane solution and film (Zeonex) by UV-visible absorption and fluorescence spectroscopy, and electrochemical properties studied by cyclic voltammetry. Thermal stability of the new LDS compounds was evaluated by Thermogravimetric analysis (TGA). Theoretical computational studies provided evidence of existence of intramolecular charge-transfer (ICT) between frontier orbitals of donor and acceptor moieties. The good photophysical and thermal properties of the synthesized TPE derivatives, associated with high molar absorption coefficients in UV spectrum and emission maximum in the range of 476-531 nm, make them promising candidates for LDS layers in OPV application.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationBarros, Hélio L... [et.al.] - Synthesis and photophysical properties of tetraphenylethylene derivatives as luminescent downshifting materials for organic photovoltaic applications. In: Dyes and Pigments, 2021, Vol. 195, article nº 109724pt_PT
dc.identifier.doi10.1016/j.dyepig.2021.109724pt_PT
dc.identifier.eissn1873-3743
dc.identifier.issn0143-7208
dc.identifier.urihttp://hdl.handle.net/10400.9/3663
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationNovel building Integration Designs for increased Efficiencies in Advanced Climatically Tunable Renewable Energy Systems
dc.relation.publisherversionhttps://doi.org/10.1016/j.dyepig.2021.109724pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectSolar cellspt_PT
dc.subjectEnergy transferpt_PT
dc.subjectLuminescentpt_PT
dc.subjectDyespt_PT
dc.subjectPhotophysical propertiespt_PT
dc.subjectFluorescencept_PT
dc.titleSynthesis and photophysical properties of tetraphenylethylene derivatives as luminescent downshifting materials for organic photovoltaic applicationspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleNovel building Integration Designs for increased Efficiencies in Advanced Climatically Tunable Renewable Energy Systems
oaire.awardURIinfo:eu-repo/grantAgreement/EC/H2020/815271/EU
oaire.citation.titleDyes and Pigmentspt_PT
oaire.citation.volume195pt_PT
oaire.fundingStreamH2020
person.familyNameBarros
person.familyNameEsteves
person.familyNameBrites
person.givenNameHelio
person.givenNameM. Alexandra
person.givenNameMaria João de Sousa
person.identifier.ciencia-id8D1A-97AE-F411
person.identifier.ciencia-id6710-13F6-3011
person.identifier.orcid0000-0003-4797-7292
person.identifier.orcid0000-0002-7010-605X
person.identifier.orcid0000-0002-1081-7191
person.identifier.ridH-2971-2017
person.identifier.scopus-author-id35581297200
project.funder.identifierhttp://doi.org/10.13039/501100008530
project.funder.nameEuropean Commission
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
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relation.isAuthorOfPublication341c4414-3fe7-4a05-99d5-8577bfdd05c8
relation.isAuthorOfPublicationafcf1d4c-fc7e-4486-b0f4-58f27acc6834
relation.isAuthorOfPublication.latestForDiscovery341c4414-3fe7-4a05-99d5-8577bfdd05c8
relation.isProjectOfPublication5e18abb9-c7ff-4b7e-b4c2-338f69e1eae1
relation.isProjectOfPublication.latestForDiscovery5e18abb9-c7ff-4b7e-b4c2-338f69e1eae1

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