The files include - input files for the DFT calculation referred on the paper and performed with Quantum Espresso: - Graphene nanoribbon with dimentions 7,N16 with attached to a Au cluster with 20 atoms - Graphene nanoribbon with dimentions 7,N16, 7,N12, 7,N10, 7,N8 - output files of the BSE calculation performed with the Yambo code. The output file includes, at the end, a transcription of the input file. The systems computed are graphene nanoribbons with dimentions 7,N16, 7,N12, 7,N10, 7,N8