Surface functionalization of ZnO nanorods with C60 derivatives carrying phosphonic acid functionalities

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Details zur Publikation

Autorinnen und Autoren: Voigt M, Klaumünzer M, Ebel A, Werner F, Yang G, Marczak R, Spiecker E, Guldi DM, Hirsch A, Peukert W
Zeitschrift: Journal of Physical Chemistry C
Verlag: American Chemical Society
Jahr der Veröffentlichung: 2011
Band: 115
Heftnummer: 13
Seitenbereich: 5561-5565
ISSN: 1932-7447
eISSN: 1932-7455


Abstract


ZnO with its wide band gap (3.37 eV) emerged as a promising semiconductor material for applications in the fields of printable and flexible electronics such as field effect transistors, etc. The fact that contacts at particle/particle interfaces exert a limiting impact on device performances motivates research on aligning the electronic levels at particle/particle interfaces. To this end, we focus in the present study on the surface functionalization of ZnO nanorods by a series of C derivatives. The latter share in common (i) a phosphonic acid as an anchor to ZnO, (ii) an alkyl chain as a flexible spacer, and (iii) a C as the headgroup. To shed light onto the electronic interactions between ZnO and C, we vary the alkyl chain length from n = 3 to n = 18. HRTEM and EELS prove the successful surface functionalization. Fundamental to this work are steady state absorption and photoluminescence measurements, which confirm the presence of appreciable electronic couplings between ZnO nanorods and C. Especially the photoluminescence measurements are important since they provide strong support for the dependence between spacer length and strength of electronic communication. In particular, a blue-shift of the ZnO free exciton emission band amounting to as much as 50 meV is observed with a decrease in spacer length. Furthermore, time-resolved absorption measurements corroborate ultrafast charge injection - facilitated by strong coupling - from the photoexcited ZnO nanorods to C. © 2011 American Chemical Society.



FAU-Autorinnen und Autoren / FAU-Herausgeberinnen und Herausgeber

Guldi, Dirk Michael Prof. Dr.
Lehrstuhl für Physikalische Chemie I
Hirsch, Andreas Prof. Dr.
Lehrstuhl für Organische Chemie II
Klaumünzer, Martin
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Peukert, Wolfgang Prof. Dr.-Ing.
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik
Spiecker, Erdmann Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Voigt, Michael Dr.
Lehrstuhl für Feststoff- und Grenzflächenverfahrenstechnik


Zusätzliche Organisationseinheit(en)
Exzellenz-Cluster Engineering of Advanced Materials
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)


Forschungsbereiche

B Nanoelectronic Materials
Exzellenz-Cluster Engineering of Advanced Materials
A1 Functional Particle Systems
Exzellenz-Cluster Engineering of Advanced Materials
A2 Nanoanalysis and Microscopy
Exzellenz-Cluster Engineering of Advanced Materials


Zitierweisen

APA:
Voigt, M., Klaumünzer, M., Ebel, A., Werner, F., Yang, G., Marczak, R.,... Peukert, W. (2011). Surface functionalization of ZnO nanorods with C60 derivatives carrying phosphonic acid functionalities. Journal of Physical Chemistry C, 115(13), 5561-5565. https://dx.doi.org/10.1021/jp112079u

MLA:
Voigt, Michael, et al. "Surface functionalization of ZnO nanorods with C60 derivatives carrying phosphonic acid functionalities." Journal of Physical Chemistry C 115.13 (2011): 5561-5565.

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Zuletzt aktualisiert 2019-06-08 um 09:05