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

Journal article
(Original article)


Publication Details

Author(s): Kießling D, Costa RD, Katsukis G, Malig J, Lodermeyer F, Feihl S, Roth AM, Wibmer L, Kehrer M, Volland M, Wagner P, Wallace GG, Officer DL, Guldi DM
Journal: Chemical Science
Publisher: Royal Society of Chemistry
Publication year: 2013
Volume: 4
Journal issue: 8
Pages range: 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 Authors / FAU Editors

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


Additional Organisation
Exzellenz-Cluster Engineering of Advanced Materials


External institutions
University of Wollongong (UOW)


How to cite

APA:
Kießling, D., Costa, R.D., Katsukis, 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.

BibTeX: 

Last updated on 2019-09-04 at 14:53

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