dc.contributor.author
Lee, Calvin J.
dc.contributor.author
Sharma, Ashish
dc.contributor.author
Panjwani, Naitik A.
dc.contributor.author
Etchells, Isaac M.
dc.contributor.author
Gholizadeh, Elham M.
dc.contributor.author
White, Jonathan M.
dc.contributor.author
Shaw, Paul E.
dc.contributor.author
Burn, Paul. L.
dc.contributor.author
Behrends, Jan
dc.contributor.author
Rao, Akshay
dc.date.accessioned
2024-02-01T09:26:05Z
dc.date.available
2024-02-01T09:26:05Z
dc.identifier.uri
https://refubium.fu-berlin.de/handle/fub188/41472
dc.identifier.uri
http://dx.doi.org/10.17169/refubium-41194
dc.description.abstract
Singlet fission (SF) is a potential avenue for augmenting the performance of silicon photovoltaics, but the scarcity of SF materials energy-matched to silicon represents a barrier to the commercial realization of this technology. In this work, a molecular engineering approach is described to increase the energy of the S1 and T1 energy levels of diketopyrrolopyrrole derivatives such that the energy-level requirements for exothermic SF and energy-transfer to silicon are met. Time-resolved photoluminescence studies show that the silicon-matched materials are SF active in the solid state, forming a correlated triplet pair 1(TT) – a crucial intermediate in the SF process – as observed through Herzberg-Teller emission from 1(TT) at both 77 K and room temperature. Transient electron paramagnetic resonance studies show that the correlated triplet pair does not readily separate into the unbound triplets, which is a requirement for energy harvesting by silicon. The fact that the triplet pair do not separate into free triplets is attributed to the intermolecular crystal packing within the thin films. Nevertheless, these results demonstrate a promising route for energy-tuning silicon-matched SF materials.
en
dc.format.extent
13 Seiten
dc.rights.uri
https://creativecommons.org/licenses/by-nc/4.0/
dc.subject
diketopyrrolopyrroles
en
dc.subject
organic semiconductors
en
dc.subject
organic electronics
en
dc.subject
photoenergy conversion
en
dc.subject
singlet fission
en
dc.subject.ddc
500 Naturwissenschaften und Mathematik::530 Physik::530 Physik
dc.title
Toward Silicon-Matched Singlet Fission: Energy-Level Modifications Through Steric Twisting of Organic Semiconductors
dc.type
Wissenschaftlicher Artikel
dc.identifier.sepid
96964
dcterms.bibliographicCitation.articlenumber
2301539
dcterms.bibliographicCitation.doi
10.1002/adom.202301539
dcterms.bibliographicCitation.journaltitle
Advanced Optical Materials
dcterms.bibliographicCitation.number
3
dcterms.bibliographicCitation.volume
12
dcterms.bibliographicCitation.url
https://doi.org/10.1002/adom.202301539
refubium.affiliation
Physik
refubium.resourceType.isindependentpub
no
dcterms.accessRights.openaire
open access
dcterms.isPartOf.eissn
2195-1071
refubium.resourceType.provider
WoS-Alert