▎ 摘　　要

We have studied the photo current generation, conduction mechanism and photocatalytic activity in reduced graphene oxide - zinc telluride (RGO-ZnTe) composite synthesized by simple low-cost one pot single step solvothermal reaction. The photo responsivity of the RGO-ZnTe composite thin film photodetector shows 3 orders of magnitude higher compared to controlled-ZnTe under simulated solar light illumination. A linear variation of photosensitivity with the incident illumination intensity was observed. The electrical conduction measurement of the composite in the frequency range from 20 Hz to 2 MHz was carried out in the temperature range of 298 - 393 K. The direct current (DC) conductivity of the RGO-ZnTe composite follows Arrhenius relationship. The scaling of conductivity spectra shows the temperature-independent nature of the conduction mechanism in the RGO-ZnTe composite. As prepared RGO-ZnTe composites exhibit excellent photocatalytic efficiency toward the degradation of Rhodamine B (Rh B) under simulated solar light irradiation in compared to the controlled-ZnTe. The synergy of ZnTe and RGO in achieving improved photocatalytic Rh B degradation has also been studied.