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Triplet-charge annihilation in a small molecule donor: acceptor blend as a major loss mechanism in organic photovoltaics
dc.contributor.author | Marín-Beloqui, José Manuel | |
dc.contributor.author | Casado-Cordón, Juan | |
dc.date.accessioned | 2022-07-15T06:12:08Z | |
dc.date.available | 2022-07-15T06:12:08Z | |
dc.date.created | 2022-07-14 | |
dc.date.issued | 2022-06-23 | |
dc.identifier.uri | https://hdl.handle.net/10630/24682 | |
dc.description | Resumen comunicación presentada | es_ES |
dc.description.abstract | Organic photovoltaics (OPV) are close to reaching a landmark 20% device efficiency.[1] One of the proposed reasons that OPVs have yet to attain this milestone is their propensity toward triplet formation. In this talk,[2] the small molecule donor, DRCN5T, is studied using a variety of spectroscopy techniques, and blended with both fullerene and non-fullerene acceptors. Specifically, picosecond and microsecond transient absorption and Raman spectroscopies are focused on. Despite DRCN5T's ability to achieve OPV efficiencies of over 10%,[3] it generates an unusually high population of triplets. These triplets are primarily formed in amorphous regions via back recombination from a charge transfer state. As such, triplets have a dual role in DRCN5T device efficiency suppression: they both hinder free charge carrier formation and annihilate those free charges that do form. Using microsecond transient absorption spectroscopy under oxygen conditions, this triplet-charge annihilation (TCA) is directly observed as a general phenomenon in a variety of DRCN5T: fullerene and non-fullerene blends. Since TCA is usually inferred rather than directly observed, it is demonstrated that this technique is a reliable method to establish the presence of TCA. | es_ES |
dc.description.sponsorship | Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech. | es_ES |
dc.language.iso | eng | es_ES |
dc.rights | info:eu-repo/semantics/openAccess | es_ES |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | Espectroscopía | es_ES |
dc.subject | Células solares | es_ES |
dc.subject | Células fotovoltaicas | es_ES |
dc.subject.other | Organic solar cells | es_ES |
dc.subject.other | Transient absorption spectroscopy | es_ES |
dc.subject.other | Organic photovoltaics | es_ES |
dc.subject.other | Spectroscopy | es_ES |
dc.title | Triplet-charge annihilation in a small molecule donor: acceptor blend as a major loss mechanism in organic photovoltaics | es_ES |
dc.type | info:eu-repo/semantics/conferenceObject | es_ES |
dc.centro | Facultad de Ciencias | es_ES |
dc.relation.eventtitle | XXX Bienal de la Real Sociedad Española de Química | es_ES |
dc.relation.eventplace | Granada | es_ES |
dc.relation.eventdate | 26 Junio a 1 Julio de 2022 | es_ES |
dc.rights.cc | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |