Infrared study of the MoO3 doping efficiency in 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP)
Electrochemical doping produces clear changes in the vibrational spectra of organic semiconductors as we show here for the system molybdenum oxide (MoO3) doped into the charge transport material 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP). Based on density-functional theory (DFT) calculations of vibr...
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| Hauptverfasser: | , , , , , , |
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| Dokumenttyp: | Article (Journal) |
| Sprache: | Englisch |
| Veröffentlicht: |
2013
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| In: |
Organic electronics
Year: 2012, Jahrgang: 14, Heft: 2, Pages: 575-583 |
| DOI: | 10.1016/j.orgel.2012.11.031 |
| Online-Zugang: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1016/j.orgel.2012.11.031 Verlag, lizenzpflichtig, Volltext: https://www.sciencedirect.com/science/article/pii/S1566119912005472 
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| Verfasserangaben: | Tobias Glaser, Sebastian Beck, Bernd Lunkenheimer, Daniela Donhauser, Andreas Köhn, Michael Kröger, Annemarie Pucci |
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| 245 | 1 | 0 | |a Infrared study of the MoO3 doping efficiency in 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP) |c Tobias Glaser, Sebastian Beck, Bernd Lunkenheimer, Daniela Donhauser, Andreas Köhn, Michael Kröger, Annemarie Pucci |
| 246 | 3 | 3 | |a Infrared study of the MoO 3 doping efficiency in 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP) |
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| 500 | |a First published: 14 December 2012 | ||
| 520 | |a Electrochemical doping produces clear changes in the vibrational spectra of organic semiconductors as we show here for the system molybdenum oxide (MoO3) doped into the charge transport material 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP). Based on density-functional theory (DFT) calculations of vibrational spectra, the new spectral features can be attributed to the CBP cation that forms as a result of electron transfer from CBP to MoO3. The intensity of the new vibrational lines is a direct measure for the probability of charge transfer. MoO3 agglomerating within the CBP matrix limits the active interface area between the two species. The appearance of a broad electronic transition in the infrared range indicates a new electronic structure at the interface compared to the individual components. The intensity of this electronic excitation serves as a measure for the interface area indicating a linear increase with MoO3 concentration. Deposition onto cooled substrates results in smaller agglomerates, and thus yields a higher efficiency. | ||
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| 650 | 4 | |a Agglomeration | |
| 650 | 4 | |a Charge dissociation | |
| 650 | 4 | |a Charge transfer | |
| 650 | 4 | |a Doping efficiency | |
| 650 | 4 | |a Electrochemical doping | |
| 650 | 4 | |a Infrared spectroscopy | |
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