Evidence map›Paper›PMID 35927434›Full record

ArticleNature materials2022

Dielectric control of reverse intersystem crossing in thermally activated delayed fluorescence emitters.

Alexander J Gillett, Anton Pershin, Raj Pandya, Sascha Feldmann, Alexander J Sneyd, Antonios M Alvertis, Emrys W Evans, Tudor H Thomas, Lin-Song Cui, Bluebell H Drummond and 5 more

Abstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Nature materials, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

16 citing papers in PubMed.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

15 authors.

Alexander J Gillett *Cavendish Laboratory, University of Cambridge, Cambridge, UK. ajg216@cam.ac.uk.ORCID http://orcid.org/0000-0001-7572-7333
Anton Pershin *Laboratory for Chemistry of Novel Materials, Université de Mons, Mons, Belgium.ORCID http://orcid.org/0000-0002-2414-6405
Raj PandyaCavendish Laboratory, University of Cambridge, Cambridge, UK.
Sascha FeldmannCavendish Laboratory, University of Cambridge, Cambridge, UK.ORCID http://orcid.org/0000-0002-6583-5354
Alexander J SneydCavendish Laboratory, University of Cambridge, Cambridge, UK.ORCID http://orcid.org/0000-0002-4205-0554
Antonios M AlvertisCavendish Laboratory, University of Cambridge, Cambridge, UK.
Emrys W EvansCavendish Laboratory, University of Cambridge, Cambridge, UK.ORCID http://orcid.org/0000-0002-9092-3938
Tudor H ThomasCavendish Laboratory, University of Cambridge, Cambridge, UK.
Lin-Song CuiCAS Key Laboratory of Soft Matter Chemistry, Department of Polymer Science and Engineering, University of Science and Technology of China, Hefei, China.ORCID http://orcid.org/0000-0001-6577-3432
Bluebell H DrummondCavendish Laboratory, University of Cambridge, Cambridge, UK.ORCID http://orcid.org/0000-0001-5940-8631
Gregory D ScholesDepartment of Chemistry, Princeton University, Princeton, NJ, USA.ORCID http://orcid.org/0000-0003-3336-7960
Yoann OlivierUnité de Chimie Physique Théorique et Structurale & Laboratoire de Physique du Solide, Namur Institute of Structured Matter, Université de Namur, Namur, Belgium.
Akshay RaoCavendish Laboratory, University of Cambridge, Cambridge, UK.ORCID http://orcid.org/0000-0003-4261-0766
Richard H FriendCavendish Laboratory, University of Cambridge, Cambridge, UK.ORCID http://orcid.org/0000-0001-6565-6308
David BeljonneLaboratory for Chemistry of Novel Materials, Université de Mons, Mons, Belgium. david.beljonne@umons.ac.be.ORCID http://orcid.org/0000-0001-5082-9990

Funding

European Research Council 670405European Research Council 758826
6 · The paper itself

Abstract

Thermally activated delayed fluorescence enables organic semiconductors with charge transfer-type excitons to convert dark triplet states into bright singlets via reverse intersystem crossing. However, thus far, the contribution from the dielectric environment has received insufficient attention. Here we study the role of the dielectric environment in a range of thermally activated delayed fluorescence materials with varying changes in dipole moment upon optical excitation. In dipolar emitters, we observe how environmental reorganization after excitation triggers the full charge transfer exciton formation, minimizing the singlet-triplet energy gap, with the emergence of two (reactant-inactive) modes acting as a vibrational fingerprint of the charge transfer product. In contrast, the dielectric environment plays a smaller role in less dipolar materials. The analysis of energy-time trajectories and their free-energy functions reveals that the dielectric environment substantially reduces the activation energy for reverse intersystem crossing in dipolar thermally activated delayed fluorescence emitters, increasing the reverse intersystem crossing rate by three orders of magnitude versus the isolated molecule.

Indexed as

SemiconductorsFluorescence

Identifiers

PMID35927434
PMCPMC7613666

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.