▎ 摘　　要

Herein, lead iodide (PbI2) nanorods/graphene oxide (GO) nanocomposites have been successfully achieved at low temperature via microwave-assisted syntheses route. The X-ray diffraction (XRD) analysis confirm good crystallinity and absence of any impurity in the prepared hybrid nanostructures which further confirmed through Raman analysis. The XRD and Raman study also confirm the doping of GO in 2H polytypic PbI2 structure. The average crystallite size of PbI2 is calculated to be 20 nm which found to be increased to 53 nm in the case of GO-PbI2 for high intensity peak. Scanning electron microscope (SEM) images reveal that the GO sheets are decorated with PbI2 nanoparticles and nanorods. The absorption spectra of PbI2 was found to broaden whereas energy bandgap of GO-PbI2 decreases to 2.83 eV in compare to 3.24 eV for PbI2. The effect of graphene oxide doping on photodetector performance of PbI2 was elucidated by measuring the I-V characteristics under 532 nm laser light illumination. The pure PbI2 exhibits a stable and reversible photodetector performance with responsivity of 0.060 AW(-1), detectivity of 6.38 x 10(10) Jones, EQE of similar to 14 % and response time of 224 ms. For GO-doped PbI2, these parameters were found to be improved to 0.182 AW(-1), 1.79 x 10(11) Jones, similar to 42 %, and 128 ms, respectively. (C) 2020 Elsevier B.V. All rights reserved.