Charge transfer in thin films of donor-acceptor complexes studied by infrared spectroscopy
The degree of charge transfer in thin films of organic charge transfer (CT)-complexes, which are deposited via thermal evaporation, is examined via infrared-spectroscopy. We demonstrate a linear relationship between the shift in the excitation energy of the CN-stretching mode of CT-complexes with th...
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| Main Authors: | , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
July 2012
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| In: |
Organic electronics
Year: 2012, Volume: 13, Issue: 7, Pages: 1237-1244 |
| DOI: | 10.1016/j.orgel.2012.02.021 |
| Online Access: | Resolving-System, Volltext: http://dx.doi.org/10.1016/j.orgel.2012.02.021 Verlag, Volltext: http://www.sciencedirect.com/science/article/pii/S1566119912000924 
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| Author Notes: | Diana Nanova, Sebastian Beck, Andreas Fuchs, Tobias Glaser, Christian Lennartz, Wolfgang Kowalsky, Annemarie Pucci, Michael Kroeger |
| Summary: | The degree of charge transfer in thin films of organic charge transfer (CT)-complexes, which are deposited via thermal evaporation, is examined via infrared-spectroscopy. We demonstrate a linear relationship between the shift in the excitation energy of the CN-stretching mode of CT-complexes with the acceptor 7,7,8,8-tetracyanoquinodimethane (TCNQ) and the charge transfer. The measured correlation corresponds very well with DFT calculations. For Na-TCNQ we observe a splitting in the peak of the CN-stretching mode, which can be explained by the coupling of two modes and was confirmed by the calculations. In CT-complexes with partial charge transfer the appearance of an electronic excitation is demonstrated. |
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| Item Description: | Gesehen am 30.10.2018 |
| Physical Description: | Online Resource |
| DOI: | 10.1016/j.orgel.2012.02.021 |