期刊
SMALL
卷 9, 期 13, 页码 2348-2357出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.201202427
关键词
phthalocyanines; graphene; exfoliation; charge transfer; solar cells
类别
资金
- MICINN, Spain [CTQ2011-24187/BQU, CDS 2007-00010]
- CAM [MADRISOLAR-2, S2009/PPQ/1533]
- DFG, Germany [SFB 583]
- GSMS (Graduate School of Molecular Science)
- ZMP
- EU (FUNMOLS) [FP7-212942-1, X10D, FP7-287818]
- Humboldt Foundation
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 graphenenanographene (NG)that are photoactive. The p-type character of the oPPV backbones and the increasing length of the oPPV backbones facilitate the overall - 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%.
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