Singlet fission in thin films of metallo-supramolecular polymers with ditopic thiophene-bridged terpyridine ligands

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F17%3A00477332" target="_blank" >RIV/61389013:_____/17:00477332 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/17:10368332

Result on the web

<a href="http://dx.doi.org/10.1039/C7TC00484B" target="_blank" >http://dx.doi.org/10.1039/C7TC00484B</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1039/C7TC00484B" target="_blank" >10.1039/C7TC00484B</a>

Result language

angličtina

Original language name

Singlet fission in thin films of metallo-supramolecular polymers with ditopic thiophene-bridged terpyridine ligands

Original language description

The singlet fission (SF) phenomenon is currently investigated for its potential to overcome the Shockley–Queisser energy conversion efficiency limit of single-junction photovoltaic (PV) cells. One of the hurdles of using SF for PV cells is the limited choice among the presently available SF materials. We compare the photophysical behavior of thin solid films of two novel compounds: a ditopic ligand bis(terpyridine-4´-yl)terthiophene (T) and a metallo-supramolecular polymer (MSP), prepared by the coordination of T to Zn2+ ions (PT). The transient absorption kinetics in PT after photoexcitation into its second electronic excited state was consistent with an ultrafast (SF) process with a time constant of 160 fs. The lifetime of such a formed triplet state reached only 1 ns, due to mutual bimolecular annihilation, which also hindered the determination of the yield of the triplet state formation. In contrast, the metal-free thin films of T showed no signs of SF, but rather profound exciton relaxation through an excimer formation. Powder WAXS diffractograms pointed out a lower degree of structural order in the PT than that in the T – which may be the probable reason for differences in energy relaxation pathways of these two materials. To the best of our knowledge, singlet fission has not yet been reported in the MSP class of materials.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10404 - Polymer science

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of Materials Chemistry C

ISSN

2050-7526

e-ISSN

—

Volume of the periodical

5

Issue of the periodical within the volume

32

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

8041-8051

UT code for WoS article

000407815800006

EID of the result in the Scopus database

2-s2.0-85027549097