Evidence map›Paper›PMID 34446726›Full record

ArticleNature communications2021

Vacancy control in acene blends links exothermic singlet fission to coherence.

Clemens Zeiser, Chad Cruz, David R Reichman, Michael Seitz, Jan Hagenlocher, Eric L Chronister, Christopher J Bardeen, Roel Tempelaar, Katharina Broch

Open access · goldAbstract read
PubMed Full text at PMC Publisher
In one paragraph

Article in Nature communications, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.

0numbers the graph read from it
0cells of the map it votes in
1citing papers in PubMed
2.0field-weighted citation impact, top 13% of its field
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

1 citing paper in PubMed, 15 citations in OpenAlex.

  1. Article
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

9 authors at 5 institutions in 2 countries.

Clemens ZeiserInstitute of Applied Physics, University of Tübingen, Tübingen, Germany.ORCID http://orcid.org/0000-0003-3613-2243
Chad CruzDepartment of Chemistry, University of California at Riverside, Riverside, CA, USA.
David R ReichmanDepartment of Chemistry, Columbia University, New York, NY, USA.ORCID http://orcid.org/0000-0001-8424-902X
Michael SeitzInstitute of Inorganic Chemistry, University of Tübingen, Tübingen, Germany.
Jan HagenlocherInstitute of Applied Physics, University of Tübingen, Tübingen, Germany.
Eric L ChronisterUniversity of Nevada, Las Vegas, 4505S. Maryland Pkwy, Las Vegas, NV, USA.
Christopher J BardeenDepartment of Chemistry, University of California at Riverside, Riverside, CA, USA.
Roel TempelaarDepartment of Chemistry, Columbia University, New York, NY, USA. roel.tempelaar@northwestern.edu.ORCID http://orcid.org/0000-0003-0786-7304
Katharina BrochInstitute of Applied Physics, University of Tübingen, Tübingen, Germany. katharina-anna.broch@uni-tuebingen.de.ORCID http://orcid.org/0000-0002-9354-292X
University of Tübingen · DEUniversity of California, Riverside · USColumbia University · USNorthwestern University · USUniversity of Nevada, Las Vegas · US

Funding

Deutsche Forschungsgemeinschaft (German Research Foundation) BR 4869/4-1
6 · The paper itself

Abstract

The fission of singlet excitons into triplet pairs in organic materials holds great technological promise, but the rational application of this phenomenon is hampered by a lack of understanding of its complex photophysics. Here, we use the controlled introduction of vacancies by means of spacer molecules in tetracene and pentacene thin films as a tuning parameter complementing experimental observables to identify the operating principles of different singlet fission pathways. Time-resolved spectroscopic measurements in combination with microscopic modelling enables us to demonstrate distinct scenarios, resulting from different singlet-to-triplet pair energy alignments. For pentacene, where fission is exothermic, coherent mixing between the photoexcited singlet and triplet-pair states is promoted by vibronic resonances, which drives the fission process with little sensitivity to the vacancy concentration. Such vibronic resonances do not occur for endothermic materials such as tetracene, for which we find fission to be fully incoherent; a process that is shown to slow down with increasing vacancy concentration.

Identifiers

PMID34446726
PMCPMC8390483
OpenAlexW3194849651

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

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.