Novel nanographene/porphyrin hybrids-preparation, characterization, and application in solar energy conversion schemes

Beitrag in einer Fachzeitschrift
(Originalarbeit)


Details zur Publikation

Autor(en): Kießling D, Costa Riquelme RD, Katsoukis G, Malig J, Lodermeyer F, Feihl S, Roth A, Wibmer L, Kehrer M, Volland M, Wagner P, Wallace GG, Officer DL, Guldi DM
Zeitschrift: Chemical Science
Verlag: Royal Society of Chemistry
Jahr der Veröffentlichung: 2013
Band: 4
Heftnummer: 8
Seitenbereich: 3085-3098
ISSN: 2041-6520


Abstract


Four novel nanographene/porphyrin hybrids were prepared, characterized, and probed in solar energy conversion schemes. Exfoliation of graphite by means of immobilizing four different porphyrins onto the basal plane of graphene is accompanied by distinct electronic interactions in both the ground and the excited states. In the ground state, a strong loss in oscillator strength goes hand-in-hand with a notable broadening of the porphyrin transitions and, as such, attests to the shift of electron density from the electron donating porphyrins to nanographene. In the excited state, a nearly quantitative quenching of the porphyrin fluorescence is indicative of full charge transfer. The latter is corroborated by femtosecond transient absorption measurements, which reveal the generation of the one-electron oxidized radical cation of the porphyrins with absorption maxima at 490 and 625 nm in the visible region and conduction band electrons in nanographene with features at 890 and 1025 nm in the near infrared region. We have demonstrated the applicability of the new nanographene/porphyrin hybrids in, for example, solar cells. In this regard, the presence of flakes is crucial in terms of influencing the injection processes, preventing aggregation, and reducing recombination losses, which are commonly encountered in porphyrin-based DSSCs. © 2013 The Royal Society of Chemistry.



FAU-Autoren / FAU-Herausgeber

Feihl, Sebastian Dr.
Lehrstuhl für Physikalische Chemie I
Guldi, Dirk Michael Prof. Dr.
Lehrstuhl für Physikalische Chemie I
Katsoukis, Georgios
Lehrstuhl für Physikalische Chemie I
Kehrer, Matthias
Lehrstuhl für Chemische Reaktionstechnik
Kießling, Daniel
Lehrstuhl für Physikalische Chemie I
Lodermeyer, Fabian Dr.
Lehrstuhl für Physikalische Chemie I
Malig, Jenny
Sonderforschungsbereich 953/2 Synthetische Kohlenstoffallotrope
Roth, Alexandra Dr.
Sonderforschungsbereich 953/2 Synthetische Kohlenstoffallotrope
Volland, Michel
Lehrstuhl für Physikalische Chemie I
Wibmer, Leonie
Lehrstuhl für Physikalische Chemie I


Autor(en) der externen Einrichtung(en)
University of Wollongong (UOW)


Zitierweisen

APA:
Kießling, D., Costa Riquelme, R.D., Katsoukis, G., Malig, J., Lodermeyer, F., Feihl, S.,... Guldi, D.M. (2013). Novel nanographene/porphyrin hybrids-preparation, characterization, and application in solar energy conversion schemes. Chemical Science, 4(8), 3085-3098. https://dx.doi.org/10.1039/c3sc51026c

MLA:
Kießling, Daniel, et al. "Novel nanographene/porphyrin hybrids-preparation, characterization, and application in solar energy conversion schemes." Chemical Science 4.8 (2013): 3085-3098.

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Zuletzt aktualisiert 2018-08-08 um 21:25