Photodetection Enhancement via Graphene Oxide Deposition on Poly 3-Methyl Aniline

Abstract

A graphene oxide (GO)/poly 3-methyl aniline (P3MA) photodetector has been developed for light detection in a broad optical region: UV, Vis, and IR. The 3-methyl aniline was initially synthesized via radical polymerization using an acid medium, i.e., K2S2O8 oxidant. Consequently, the GO/P3MA composite was obtained through the adsorption of GO into the surface of P3MA. The chemical structure and optical properties of the prepared materials have been illustrated via XRD, FTIR, SEM, and TEM analysis. The absorbance measurements demonstrate good optical properties in the UV, Vis, and near-IR regions, although a decrease in the bandgap from 2.4 to 1.6 eV after the composite formation was located. The current density (Jph) varies between 0.29 and 0.68 mA·cm−2 (at 2.0 V) under dark and light, respectively. The photodetector has been tested using on/off chopped light at a low potential, in which the produced Jph values decrease from 0.14 to 0.04 µA·cm−2, respectively. The GO/P3MA photodetector exhibits excellent R (and D) values of 4 and 2.7 mA·W−1 (0.90 × 109 and 0.60 × 109 Jones) in the UV (340 nm) and IR (730 nm) regions, respectively. The R and D values obtained here make the prepared photodetector a promising candidate for future light detection instruments.

One pot synthesizing of cobalt (III) and (IV) oxides/polypyrrole nanocomposite for light sensing in wide optical range

“…The C-H groups exhibit these shifts at 1164 and 1383 cm −1 , whereas the C-N group experiences a new position at 1045 cm −1 . These shifts underscore the intricate interplay between the organic and inorganic components, implying strong interactions and modifications at the molecular level [22]. Such shifts could arise from chemical bonding and structural rearrangements, signifying a cohesive integration of the Co 2 O 3 -Co 3 O 4 nanocomposite with the Ppy matrix.…”

“…Our group works on photodetector based on polymer composite [22][23][24][25], in which these photodetectors based on conductive polymers offer numerous advantages over their traditional metal-based counterparts. Conductive polymers can be processed through solution-based methods, allowing for the convenient and costeffective fabrication of devices on flexible substrates.…”

As2O3-poly(1H-pyrrole) nanocomposite for hydrogen generation from Red Sea water with high efficiencey

“…After the incorporation of As 2 O 3 in the polymer under the polymerization process, almost the same bands are observed, but with a red-shift or blue-shift under the effect of this oxide material on the polymer chains. This behavior is usually observed in polymer composites and related to changes in the bond length, bond angles, and electronic density in the functional groups of the polymer [19,20].…”

“…Moreover, using the polymer material accepts the photoelectrode additional stability that is related to the compatibility of the P1HP polymer under various environmental conditions. The low dark current (J o) value under dark conditions is related to the normal semi conductivity nature of these materials that has free electrons [19,20], but this Jo can be negligible related to its very small values in compared to J ph value. The stability of the As 2 O 3 /P1HP nanocomposite photoelectrode can be assessed by conducting multiple evaluations of the generated J ph (photocurrent) value using the current-voltage relationship under light illumination, as depicted in figure 3(a).…”

“…Researchers are primarily concerned with maximizing optical properties and achieving the general ideal bandgap of 1.2 to 1.5 eV in their polymer preparation efforts. Nanoscale and composite synthesis using nanometal oxides with high optical efficiency is a common method for achieving this [19,20].…”