Influence of CdS nanorods on the optoelectronic properties of 2-dimensional rGO decorated polyindole matrix

We propose a facile in situ chemical oxidative synthesis of ternary nanohybrids PIN/CdS/rGO (PCrG) based on the integration of CdS nanorods into the polyindole (PIN) matrix along with the successive enhancement in the overall properties of the nanohybrids by addition of reduced graphene oxide (rGO). The XRD, FT-IR and XPS techniques were carried out to confirm the formation of nanohybrids and presence of the chemical bonds. Further, the surface morphology of the as-prepared specimens was examined by FESEM and TEM technique. From the study of UV–Visible absorbance spectra, the reduced optical band gap (1.78 eV) was found in the visible region for the optimized ternary nanohybrid PCrG2. From the PL spectra, maximum average decay time (214.2 ns) was evaluated for PCrG2 attributed to non-radiative recombination. Moreover, the improved thermal stability (46.33 wt % loss) and cyclic volumetric performances were exhibited by ternary nanohybrid PCrG2. In addition, the ohmic conductance was measured for the as-synthesized specimens using their J-V characteristic curves. These optimized optical, electrical and thermal properties indicate that PCrG2 may become apt material for optoelectronic device applications. •The PIN/CdS/rGO (PCrG) nanohybrids are synthesized via chemical oxidative polymerization technique.••Optical conductivity was found 1.84 × 107 Ω-1 cm-1 for the PCrG2 nanohybrid.••Ternary nanohybrid PCrG2 exhibited improved thermal stability with 46.33 weight % loss.