(562c) Investigating the Cof (Covalent Organic frameworks)-Graphene Interface Via Raman Spectroscopy and Optoelectronics

Covalent Organic Frameworks(COFs) are a promising class of lightweight materials for various applications, their optoelectronic applications especially require crystalline, thin, and continuous films for more reliable results. Direct synthesis of COFs on a Single Layer Graphene has shown improved crystallinity, similar vertical alignment, and long-range order as compared to COF powders. The non-covalent attachment of these COFs preserves the sp² hybridization network of graphene and the compelling interaction of COF-5 with Graphene enables to obtain a clean Raman Spectra of COF-5. After deposition of COF-5, red-shift and blue-shift in the G and 2D bands of Raman spectra of Graphene respectively, are observed. Further, the phenylene-derived, integrated Ï€-conjugated macrocyclic compounds in the supramolecular structure of COF-5 are optically and electrically active and hence appropriate for optoelectronic devices. Here, we study the COF-5 - Graphene heterostructure via Raman spectroscopy and the electronic properties of the heterostructure on exposure to light in the visible regime.