Identifying the Signatures of Intermolecular Interactions in Blends of PM6 with Y6 and N4 Using Absorption Spectroscopy
Abstract
Abstract In organic solar cells, the resulting device efficiency depends strongly on the local morphology and intermolecular interactions of the blend film. Optical spectroscopy was used to identify the spectral signatures of interacting chromophores in blend films of the donor polymer PM6 with two state‐of‐the‐art nonfullerene acceptors, Y6 and N4, which differ merely in the branching point of the side chain. From temperature‐dependent absorption and luminescence spectroscopy in solution, it is inferred that both acceptor materials form two types of aggregates that differ in their interaction energy. Y6 forms an aggregate with a predominant J‐type character in solution, while for N4 molecules the interaction is predominantly in a H‐like manner in solution and freshly spin‐cast film, yet the molecules reorient with respect to each other with time or thermal annealing to adopt a more J‐type interaction. The different aggregation behavior of the acceptor materials is also reflected in the blend films and accounts for the different solar cell efficiencies reported with the two blends.
- Authors:
-
[7]
- Soft Matter Optoelectronics Experimentalphysik II University of Bayreuth 95440 Bayreuth Germany
- Dynamik und Strukturbildung‐Herzig Group Physikalisches Institut Universität Bayreuth Universitätsstr. 30 95447 Bayreuth Germany
- Soft Matter Physics and Optoelectronics Institute of Physics and Astronomy University of Potsdam Karl‐Liebknecht‐Str. 24‐25 14476 Potsdam‐Golm Germany
- NSLS‐II Brookhaven National Laboratory Upton NY 11973 USA
- College of Chemistry and Chemical Engineering Central South University Chansha 410083 P. R. China
- School of Chemistry Bio21 Institute The University of Melbourne 30 Flemington Road Parkville VIC 3010 Australia
- Soft Matter Optoelectronics Experimentalphysik II University of Bayreuth 95440 Bayreuth Germany, Bayreuth Institute of Macromolecular Research (BIMF) and Bavarian Polymer Institute (BPI) University of Bayreuth 95447 Bayreuth Germany
- Publication Date:
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1883261
- Alternate Identifier(s):
- OSTI ID: 1895513
- Resource Type:
- Published Article
- Journal Name:
- Advanced Functional Materials
- Additional Journal Information:
- Journal Name: Advanced Functional Materials Journal Volume: 32 Journal Issue: 44; Journal ID: ISSN 1616-301X
- Publisher:
- Wiley Blackwell (John Wiley & Sons)
- Country of Publication:
- Germany
- Language:
- English
Citation Formats
Kroh, Daniel, Eller, Fabian, Schötz, Konstantin, Wedler, Stefan, Perdigón‐Toro, Lorena, Freychet, Guillaume, Wei, Qingya, Dörr, Maximilian, Jones, David, Zou, Yingping, Herzig, Eva M., Neher, Dieter, and Köhler, Anna. Identifying the Signatures of Intermolecular Interactions in Blends of PM6 with Y6 and N4 Using Absorption Spectroscopy. Germany: N. p., 2022.
Web. doi:10.1002/adfm.202205711.
Kroh, Daniel, Eller, Fabian, Schötz, Konstantin, Wedler, Stefan, Perdigón‐Toro, Lorena, Freychet, Guillaume, Wei, Qingya, Dörr, Maximilian, Jones, David, Zou, Yingping, Herzig, Eva M., Neher, Dieter, & Köhler, Anna. Identifying the Signatures of Intermolecular Interactions in Blends of PM6 with Y6 and N4 Using Absorption Spectroscopy. Germany. https://doi.org/10.1002/adfm.202205711
Kroh, Daniel, Eller, Fabian, Schötz, Konstantin, Wedler, Stefan, Perdigón‐Toro, Lorena, Freychet, Guillaume, Wei, Qingya, Dörr, Maximilian, Jones, David, Zou, Yingping, Herzig, Eva M., Neher, Dieter, and Köhler, Anna. Tue .
"Identifying the Signatures of Intermolecular Interactions in Blends of PM6 with Y6 and N4 Using Absorption Spectroscopy". Germany. https://doi.org/10.1002/adfm.202205711.
@article{osti_1883261,
title = {Identifying the Signatures of Intermolecular Interactions in Blends of PM6 with Y6 and N4 Using Absorption Spectroscopy},
author = {Kroh, Daniel and Eller, Fabian and Schötz, Konstantin and Wedler, Stefan and Perdigón‐Toro, Lorena and Freychet, Guillaume and Wei, Qingya and Dörr, Maximilian and Jones, David and Zou, Yingping and Herzig, Eva M. and Neher, Dieter and Köhler, Anna},
abstractNote = {Abstract In organic solar cells, the resulting device efficiency depends strongly on the local morphology and intermolecular interactions of the blend film. Optical spectroscopy was used to identify the spectral signatures of interacting chromophores in blend films of the donor polymer PM6 with two state‐of‐the‐art nonfullerene acceptors, Y6 and N4, which differ merely in the branching point of the side chain. From temperature‐dependent absorption and luminescence spectroscopy in solution, it is inferred that both acceptor materials form two types of aggregates that differ in their interaction energy. Y6 forms an aggregate with a predominant J‐type character in solution, while for N4 molecules the interaction is predominantly in a H‐like manner in solution and freshly spin‐cast film, yet the molecules reorient with respect to each other with time or thermal annealing to adopt a more J‐type interaction. The different aggregation behavior of the acceptor materials is also reflected in the blend films and accounts for the different solar cell efficiencies reported with the two blends.},
doi = {10.1002/adfm.202205711},
journal = {Advanced Functional Materials},
number = 44,
volume = 32,
place = {Germany},
year = {Tue Aug 23 00:00:00 EDT 2022},
month = {Tue Aug 23 00:00:00 EDT 2022}
}
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