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Magnetic fields reveal signatures of triplet-pair multi-exciton photoluminescence in singlet fission.
Feng, Jiale; Hosseinabadi, Parisa; de Clercq, Damon M; Carwithen, Ben P; Nielsen, Michael P; Brett, Matthew W; Prasad, Shyamal K K; Farahani, Adam A D; Li, Hsiu L; Sanders, Samuel N; Beves, Jonathon E; Ekins-Daukes, N J; Cole, Jared H; Thordarson, Pall; Huang, David M; Tayebjee, Murad J Y; Schmidt, Timothy W.
Afiliação
  • Feng J; ARC Centre of Excellence in Exciton Science, School of Chemistry, UNSW Sydney, Sydney, New South Wales, Australia.
  • Hosseinabadi P; School of Photovoltaic and Renewable Energy Engineering, UNSW Sydney, Sydney, New South Wales, Australia.
  • de Clercq DM; ARC Centre of Excellence in Exciton Science, School of Chemistry, UNSW Sydney, Sydney, New South Wales, Australia.
  • Carwithen BP; ARC Centre of Excellence in Exciton Science, School of Chemistry, UNSW Sydney, Sydney, New South Wales, Australia.
  • Nielsen MP; School of Photovoltaic and Renewable Energy Engineering, UNSW Sydney, Sydney, New South Wales, Australia.
  • Brett MW; ARC Centre of Excellence in Exciton Science, School of Chemistry, UNSW Sydney, Sydney, New South Wales, Australia.
  • Prasad SKK; ARC Centre of Excellence in Exciton Science, School of Chemistry, UNSW Sydney, Sydney, New South Wales, Australia.
  • Farahani AAD; The UNSW RNA Institute, The Australian Centre for Nanomedicine, School of Chemistry, UNSW Sydney, Sydney, New South Wales, Australia.
  • Li HL; The UNSW RNA Institute, The Australian Centre for Nanomedicine, School of Chemistry, UNSW Sydney, Sydney, New South Wales, Australia.
  • Sanders SN; Rowland Institute at Harvard University, Cambridge, MA, USA.
  • Beves JE; ARC Centre of Excellence in Exciton Science, School of Chemistry, UNSW Sydney, Sydney, New South Wales, Australia.
  • Ekins-Daukes NJ; School of Photovoltaic and Renewable Energy Engineering, UNSW Sydney, Sydney, New South Wales, Australia.
  • Cole JH; ARC Centre of Excellence in Exciton Science, School of Science, RMIT University, Melbourne, Victoria, Australia.
  • Thordarson P; The UNSW RNA Institute, The Australian Centre for Nanomedicine, School of Chemistry, UNSW Sydney, Sydney, New South Wales, Australia.
  • Huang DM; Department of Chemistry, School of Physics, Chemistry and Earth Sciences, The University of Adelaide, Adelaide, South Australia, Australia.
  • Tayebjee MJY; School of Photovoltaic and Renewable Energy Engineering, UNSW Sydney, Sydney, New South Wales, Australia.
  • Schmidt TW; ARC Centre of Excellence in Exciton Science, School of Chemistry, UNSW Sydney, Sydney, New South Wales, Australia. timothy.schmidt@unsw.edu.au.
Nat Chem ; 2024 Jul 25.
Article em En | MEDLINE | ID: mdl-39054380
ABSTRACT
The photophysical processes of singlet fission and triplet fusion have numerous emerging applications. They involve the separation of a photo-generated singlet exciton into two dark triplet excitons and the fusion of two dark triplet excitons into an emissive singlet exciton, respectively. The role of the excimer state and the nature of the triplet-pair state in these processes have been a matter of contention. Here we analyse the room temperature time-resolved emission of a neat liquid singlet fission chromophore and show that it exhibits three spectral components two that correspond to the bright singlet and excimer states and a third component that becomes more prominent during triplet fusion. This spectrum is enhanced by magnetic fields, confirming its origins in the recombination of weakly coupled triplet pairs. It is thus attributed to a strongly coupled triplet pair state. These observations unite the view that there is an emissive intermediate in singlet fission and triplet fusion, distinct from the broad, unstructured excimer emission.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Nat Chem Assunto da revista: QUIMICA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Austrália
Texto completo
Adicionar na Minha BVS
Imprimir
XML
PubMed Links
Buscar no Google

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Idioma: En Revista: Nat Chem Assunto da revista: QUIMICA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Austrália