Electrical transport properties and ultrafast optical nonlinearity of rGO–metal chalcogenide ensembles

) of C2 is ∼1.6 times higher than that of C1 and both the samples depict a positive nonlinear refractive index when measured with 630 nm femtosecond pulses. Moreover, C2 shows a two-fold faster electron transfer rate as revealed by a time resolved fluorescence study than C1. This, along with better dispersion of ZnTe nanoparticles in the rGO matrix, explains why rGO-ZnTe has better optoelectronic properties as compared to the rGO-ZnSe composite. These results in turn make the rGO-ZnTe composite a promising candidate for optoelectronic and photonic device applications.