Tuning the stability of graphene layers by phthalocyanine-based oppv oligomers towards photo- and redoxactive materials

Brinkhaus L, Katsukis G, Malig J, Costa RD, Garcia-Iglesias M, Vazquez P, Torres T, Guldi DM (2013)

Publication Type: Journal article, Original article

Publication year: 2013

Journal

Original Authors: Brinkhaus L., Katsukis G., Malig J., Costa R.D., Garcia-Iglesias M., Vazquez P., Torres T., Guldi D.M.

Publisher: Wiley-VCH Verlag

Book Volume: 9

Pages Range: 2348-2357

Journal Issue: 13

DOI: 10.1002/smll.201202427

Abstract

In contrast to pristine zinc phthalocyanine (1), zinc phthalocyanine based oPPV-oligomers (2-4) of different chain lengths interact tightly and reversibly with graphite, affording stable and finely dispersed suspensions of mono- to few-layer graphene - nanographene (NG) - that are photoactive. The p-type character of the oPPV backbones and the increasing length of the oPPV backbones facilitate the overall π-π interactions with the graphene layers. In NG/2, NG/3, and NG/4 hybrids, strong electronic coupling between the individual components gives rise to charge transfer from the photoexcited zinc phthalocyanines to NG to form hundreds of picoseconds lived charge transfer states. The resulting features, namely photo- and redoxactivity, serve as incentives to construct and to test novel solar cells. Solar cells made out of NG/4 feature stable and repeatable photocurrent generation during several 'on-off' cycles of illumination with monochromatic IPCE values of around 1%. Photoactive graphene hybrids: p-type oligo-para-phenylene vinylene zinc phthalocyanine oligomers exfoliate graphite, interact electronically with wet-chemically exfoliated graphite via charge transfer, and produce photocurrent upon illumination. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Authors with CRIS profile

Involved external institutions

Universidad Autónoma de Madrid (UAM) Spain (ES)

How to cite

APA:

Brinkhaus, L., Katsukis, G., Malig, J., Costa, R.D., Garcia-Iglesias, M., Vazquez, P.,... Guldi, D.M. (2013). Tuning the stability of graphene layers by phthalocyanine-based oppv oligomers towards photo- and redoxactive materials. Small, 9(13), 2348-2357. https://dx.doi.org/10.1002/smll.201202427

MLA:

Brinkhaus, Linda, et al. "Tuning the stability of graphene layers by phthalocyanine-based oppv oligomers towards photo- and redoxactive materials." Small 9.13 (2013): 2348-2357.

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