Controlling the photoconductivity: Graphene oxide and polyaniline self assembled intercalation

摘要

We report on controlling the optoelectronic properties of self-assembled intercalating compound of graphene oxide (GO) and HC1 doped polyaniline (PANI). Optical emission and X-ray diffraction studies revealed a secondary doping phenomenon of PANI with -OH and -COOH groups of GO, which essentially arbitrate the intercalation. A control on the polarity and the magnitude of the pho-toresponse (PR) is harnessed by manipulating the weight ratios of PANI to GO (viz., 1:1.5 and 1:2.2 are abbreviated as PG1.5 and PG2.2, respectively), where ±PR= 100(R_(Dark) - R_(UV-Vis))/R_(Dark) and R corresponds to the resistance of the device in dark or UV-Vis illumination. To be precise, the PR from GO, PANI, PG1.5, and PG2.2 are +34%, -111%, -51%, and +58%, respectively.