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Evolution of diffusion coefficient of photoexcited species in excimer forming organic thin films

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389013%3A_____%2F20%3A00519233" target="_blank" >RIV/61389013:_____/20:00519233 - isvavai.cz</a>

  • Result on the web

    <a href="https://pubs.acs.org/doi/abs/10.1021/acs.jpcc.9b08953" target="_blank" >https://pubs.acs.org/doi/abs/10.1021/acs.jpcc.9b08953</a>

  • DOI - Digital Object Identifier

    <a href="http://dx.doi.org/10.1021/acs.jpcc.9b08953" target="_blank" >10.1021/acs.jpcc.9b08953</a>

Alternative languages

  • Result language

    angličtina

  • Original language name

    Evolution of diffusion coefficient of photoexcited species in excimer forming organic thin films

  • Original language description

    The diffusion of photogenerated excitons in organic semiconductors represents often a rate-determining process in the exciton population evolution in ultrafast transient absorption experiments, due to an increased mutual exciton interaction probability at typical excitation densities. A simple description of a diffusion process with a time-independent diffusion coefficient often fails to explain the observed kinetics in the highly nonequilibrium system. In this work, we used the concept of time-dependent diffusion and determined the evolution of the diffusion coefficient of photogenerated excited species in thin films of bis(terpyridine-4′-yl)terthiophene from the experimental ultrafast transient absorption spectroscopic data at a subnanosecond time scale. We show that the diffusion coefficient decreases in time more rapidly with increasing intensity of the photoexcitation. We explain the dependences by the planarization of photoexcited molecules and excimer formation.

  • Czech name

  • Czech description

Classification

  • Type

    J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database

  • CEP classification

  • OECD FORD branch

    10404 - Polymer science

Result continuities

  • Project

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

  • Continuities

    I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Others

  • Publication year

    2020

  • Confidentiality

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

Data specific for result type

  • Name of the periodical

    Journal of Physical Chemistry C

  • ISSN

    1932-7447

  • e-ISSN

  • Volume of the periodical

    124

  • Issue of the periodical within the volume

    1

  • Country of publishing house

    US - UNITED STATES

  • Number of pages

    8

  • Pages from-to

    52-59

  • UT code for WoS article

    000507149600008

  • EID of the result in the Scopus database