Correct determination of charge transfer state energy from luminescence spectra in organic solar cells
Abstract: Generation and recombination of electrons and holes in organic solar cells occurs via charge transfer states located at the donor/acceptor interface. The energy of these charge transfer states is a crucial factor for the attainable open-circuit voltage and its correct determination is thus of utmost importance for a detailed understanding of such devices. This work reports on drastic changes of electroluminescence spectra of bulk heterojunction organic solar cells upon variation of the absorber layer thickness. It is shown that optical thin-film effects have a large impact on optical out-coupling of luminescence radiation for devices made from different photoactive materials, in configurations with and without indium tin oxide. A scattering matrix approach is presented which accurately reproduces the observed effects and thus delivers the radiative recombination spectra corrected for the wavelength-dependent out-coupling. This approach is proven to enable the correct determination of charge transfer state energies
- Location
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Deutsche Nationalbibliothek Frankfurt am Main
- Extent
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Online-Ressource
- Language
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Englisch
- Keyword
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Rekombination
Elektrolumineszenz
Organische Solarzelle
- Event
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Veröffentlichung
- (where)
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Freiburg
- (who)
-
Universität
- (when)
-
2018
- Creator
- DOI
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10.1038/s41467-018-05987-8
- URN
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urn:nbn:de:bsz:25-freidok-168152
- Rights
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Kein Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
- Last update
-
25.03.2025, 1:47 PM CET
Data provider
Deutsche Nationalbibliothek. If you have any questions about the object, please contact the data provider.
Associated
- List, Mathias
- Sarkar, Tanmoy
- Perkhun, Pavlo
- Ackermann, Jörg
- Luo, Chieh
- Würfel, Uli
- Universität
Time of origin
- 2018
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