Alam, Asiful ; Dehm, Simone ; Hennrich, Frank ; Zakharko, Yuriy ; Graf, Arko ; Pfohl, Moritz ; Hossain, Ihteaz M. ; Kappes, Manfred M. ; Zaumseil, Jana ; Krupke, Ralph ; Flavel, Benjamin S. (2017)
Photocurrent spectroscopy of dye-sensitized carbon nanotubes.
In: Nanoscale, 9 (31)
doi: 10.1039/C7NR04022A
Artikel, Bibliographie
Kurzbeschreibung (Abstract)
Monochiral (7,5) single walled carbon nanotubes (SWCNTs) are integrated into a field effect transistor device in which the built-in electric field at the nanotube/metal contact allows for exciton separation under illumination. Variable wavelength spectroscopy and 2D surface mapping of devices consisting of 10–20 nanotubes are performed in the visible region and a strong correlation between the nanotube's second optical transition (S_22) and the photocurrent is found. After integration, the SWCNTs are non-covalently modified with three different fluorescent dye molecules with off-resonant absorption maxima at 532 nm, 565 nm, and 610 nm. The dyes extend the absorption properties of the nanotube and contribute to the photocurrent. This approach holds promise for the development of photo-detectors and for applications in photovoltaics and biosensing.
| Typ des Eintrags: | Artikel |
|---|---|
| Erschienen: | 2017 |
| Autor(en): | Alam, Asiful ; Dehm, Simone ; Hennrich, Frank ; Zakharko, Yuriy ; Graf, Arko ; Pfohl, Moritz ; Hossain, Ihteaz M. ; Kappes, Manfred M. ; Zaumseil, Jana ; Krupke, Ralph ; Flavel, Benjamin S. |
| Art des Eintrags: | Bibliographie |
| Titel: | Photocurrent spectroscopy of dye-sensitized carbon nanotubes |
| Sprache: | Englisch |
| Publikationsjahr: | 20 Juli 2017 |
| Titel der Zeitschrift, Zeitung oder Schriftenreihe: | Nanoscale |
| Jahrgang/Volume einer Zeitschrift: | 9 |
| (Heft-)Nummer: | 31 |
| DOI: | 10.1039/C7NR04022A |
| URL / URN: | https://doi.org/10.1039/C7NR04022A |
| Kurzbeschreibung (Abstract): | Monochiral (7,5) single walled carbon nanotubes (SWCNTs) are integrated into a field effect transistor device in which the built-in electric field at the nanotube/metal contact allows for exciton separation under illumination. Variable wavelength spectroscopy and 2D surface mapping of devices consisting of 10–20 nanotubes are performed in the visible region and a strong correlation between the nanotube's second optical transition (S_22) and the photocurrent is found. After integration, the SWCNTs are non-covalently modified with three different fluorescent dye molecules with off-resonant absorption maxima at 532 nm, 565 nm, and 610 nm. The dyes extend the absorption properties of the nanotube and contribute to the photocurrent. This approach holds promise for the development of photo-detectors and for applications in photovoltaics and biosensing. |
| Fachbereich(e)/-gebiet(e): | 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft > Fachgebiet Molekulare Nanostrukturen 11 Fachbereich Material- und Geowissenschaften > Materialwissenschaft 11 Fachbereich Material- und Geowissenschaften |
| Hinterlegungsdatum: | 12 Feb 2018 13:00 |
| Letzte Änderung: | 12 Feb 2018 13:00 |
| PPN: | |
| Sponsoren: | BSF gratefully acknowledges support from the Deutsche Forschungsgemeinschaft (DFG) under grant numbers FL 834/ 1-1 and FL 834/2-1. RK acknowledges funding by the DFG under INST 163/354-1 FUGG. YZ, AG and JZ acknowledge financial support by European, Research Council under the European Union ’ s Seventh Framework Programme (FP/2007- 2013)/ERC Grant Agreement No. 306298. RK, FH and MK acknowledge support by the Helmholtz Association through program STN. We would also like to acknowledge Bernd Ebenhoch, and Dr Alexander Colsmann for their assist in PESA measurements. |
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