Robust Properties Of PPY-TiO2-rGO Nanocomposite As Electron Transporting Layer Material For The Application In OLED Devices

The PPY, PPY-TiO2 and PPY-TiO2-rGO nanocomposite were successfully prepared via chemical oxidative polymerization of pyrrole monomer and their structural, optical, electrical, dielectric and electrochemical properties were examined. The structural analysis for the development of pristine PPY, PPY-TiO2 and PPY-TiO2-rGO nanocomposite was carried out by X-ray diffraction technique (XRD). The surface topology of as-prepared samples was studied by FESEM and TEM analysis. The higher PL intensity was detected for PPY-TiO2-rGO nanocomposite with dominated band at 450 nm associated to blue band. The enhancement in conductivity (similar to 300 %) and reduced band gap (similar to 1.84 eV) was calculated for PPY-TiO2-rGO nanocomposite. The CV curve showed the high reduction potential (similar to +0.590 V) with high dielectric constant value for PPY-TiO2-rGO nanocomposite as detected by LCR meter. These robust properties confirmed that PPY-TiO2-rGO nanocomposite material can used as an electron transporting layer for OLED devices. (C) 2018 Elsevier Ltd. All rights reserved.