The structural, optical and electrical properties of sodium titanate nanotubes sensitized with nitrogen/sulfur co-doped graphene quantum dots as potential materials for quantum dots sensitized solar cells

•Synthesis of nanoscale heterostructures of sodium titanate nanotubes (NaNT) decorated with N- S- dopped graphene quantum dots (NS-GQD).•Structural characterization of nanoscale heterostructures of so NaNT decorated with NS-GQD electrical and optical characterization of nanoscale heterostructures of NaNT decorated with NS-GQD.•Transport properties of a quantum dots sensitized solar cell (QDSSC) prototype.