This research focuses on the use of hybrid nanographene–graphene (NG–Gr) van der Waals heterostructures (vdWHs) as materials for optoelectronic devices. We found that adjusting the size of synthesized NGs can control the strength of van der Waals interactions in NG–Gr vdWHs, which enables control over interfacial charge transfer. The interfacial charge transfer efficiency and rate in NG-Gr vdWHs increased when the size of NGs were increased from 42 to 96 sp2 carbon atoms, despite the reduction in the interfacial energy driving the charge transfer process. These findings suggest that vdW interactions are the primary factor in determining the interfacial charge transfer efficiency in NG–Gr vdWHs, while interfacial energetics and reorganization energy have only a minor influence.
Summary of the Project
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