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  Effect of Conjugation Pathway in Metal-Free Room-Temperature Dual Singlet–Triplet Emitters for Organic Light-Emitting Diodes

Ratzke, W., Schmitt, L., Matsuoka, H., Bannwarth, C., Retegan, M., Bange, S., et al. (2016). Effect of Conjugation Pathway in Metal-Free Room-Temperature Dual Singlet–Triplet Emitters for Organic Light-Emitting Diodes. The Journal of Physical Chemistry Letters, 7(22), 4802-4808. doi:10.1021/acs.jpclett.6b01907.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0007-82C0-C Version Permalink: https://hdl.handle.net/21.11116/0000-0007-82C1-B
Genre: Journal Article

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 Creators:
Ratzke, Wolfram1, Author
Schmitt, Lisa2, Author
Matsuoka, Hideto3, Author
Bannwarth, Christoph4, Author
Retegan, Marius5, Author           
Bange, Sebastian1, Author
Klemm, Philippe1, Author
Neese, Frank5, Author           
Grimme, Stefan4, Author
Schiemann, Olav3, Author
Lupton, John M.1, Author
Höger, Sigurd2, Author
Affiliations:
1Institut für Experimentelle und Angewandte Physik, Universität Regensburg, Universitätsstr. 31, 93040 Regensburg, Germany, ou_persistent22              
2Kekulé-Institut für Organische Chemie und Biochemie, University of Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany, ou_persistent22              
3Institute für Physikalische und Theoretische Chemie, University of Bonn, Wegelerstr. 12, 53115 Bonn, Germany, ou_persistent22              
4Mulliken Center for Theoretical Chemistry, University of Bonn, Beringstr. 4, 53115 Bonn, Germany, ou_persistent22              
5Research Department Neese, Max Planck Institute for Chemical Energy Conversion, Max Planck Society, ou_3023886              

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 Abstract: Metal-free dual singlet–triplet organic light-emitting diode (OLED) emitters can provide direct insight into spin statistics, spin correlations and spin relaxation phenomena, through a comparison of fluorescence to phosphorescence intensity. Remarkably, such materials can also function at room temperature, exhibiting phosphorescence lifetimes of several milliseconds. Using electroluminescence, quantum chemistry, and electron paramagnetic resonance spectroscopy, we investigate the effect of the conjugation pathway on radiative and nonradiative relaxation of the triplet state in phenazine-based compounds and demonstrate that the contribution of the phenazine nπ* excited state is crucial to enabling phosphorescence.

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Language(s): eng - English
 Dates: 2016-08-232016-11-112016-11-17
 Publication Status: Issued
 Pages: 7
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1021/acs.jpclett.6b01907
 Degree: -

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Title: The Journal of Physical Chemistry Letters
  Abbreviation : J. Phys. Chem. Lett.
Source Genre: Journal
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Publ. Info: Washington, DC : American Chemical Society
Pages: - Volume / Issue: 7 (22) Sequence Number: - Start / End Page: 4802 - 4808 Identifier: CoNE: https://pure.mpg.de/cone/journals/resource/1948-7185