期刊
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
卷 2, 期 11, 页码 1315-1319出版社
AMER CHEMICAL SOC
DOI: 10.1021/jz200472a
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资金
- Fondazione Cassa di Risparmio di Modena
- Italian Ministry of Foreign Affairs
- Italian Ministry of University and Research
- FAPESP
- CNPq (Brazil)
We investigate the optical properties of edge-fiinctionalized graphene nanosystems, focusing on the formation of junctions and charge-transfer excitons. We consider a class of graphene structures that combine the main electronic features of graphene with the wide tunability of large polycyclic aromatic hydrocarbons. By investigating prototypical ribbon-like systems, we show that, upon convenient choice of functional groups, low-energy excitations with remarkable charge-transfer character and large oscillator strength are obtained. These properties can be further modulated through an appropriate width variation, thus spanning a wide range in the low-energy region of the UV-vis spectra. Our results are relevant in view of designing all-graphene optoelectronic nanodevices, which take advantage of the versatility of molecular functionalization, together with the stability and the electronic properties of graphene nanostructures.
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