MoS2 decorated with graphene and polyaniline nanocomposite as an electron transport layer for OLED applications

• Published in: Journal of materials science. Materials in electronics Vol. 31; no. 2; pp. 1302 - 1316
• Main Authors: Choudhary, R. B., Mandal, Gobind
• Format: Journal Article
• Language: English
• Published: New York Springer US 2020; Springer Nature B.V
• Subjects: Ammonium peroxodisulfate; Aniline; Characterization and Evaluation of Materials; Chemical synthesis; Chemistry and Materials Science; Chromaticity; Decay rate; Diodes; Electrical resistivity; Electron microscopes; Electron transport; Emission analysis; Field emission microscopy; Fourier transforms; Graphene; Materials Science; Molybdenum disulfide; Nanocomposites; Nanofibers; Optical and Electronic Materials; Organic chemistry; Organic light emitting diodes; Oxidizing agents; Photoluminescence; Polyanilines; Raman spectroscopy; Sheets; Spectrum analysis
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-019-02643-9

The incorporation of two-dimensional MoS 2 and GO (graphene oxide) into polyaniline (PANI) matrix emerges as a productive way for the enhancement in electrical and optical assets of pure PANI. The ternary nanocomposite PANI–rGO–MoS 2 (PGM) is synthesized via in situ chemical oxidative polymerization of aniline monomer using ammonium persulfate (APS) as an oxidant with varying MoS 2 contents. The surface morphological images of PGM nanocomposites declared the coating of PANI nanofibers, and GO sheets over stacked MoS 2 sheets are investigated by field emission scanning electron microscope and transmission electron microscope. The interaction between polyaniline, reduced graphene oxide, and molybdenum disulfide was established by Fourier transform infrared spectroscopy and Raman spectroscopy. The bandgap was calculated for optimized PGM3 nanocomposite, nearly 1.21 eV with a relatively slow decay component and a higher non-radiative rate of electron–hole recombination. The photoluminescence spectra of PGM3 nanocomposite showed four bands: violet, blue, green–blue, and green. The chromaticity was observed in the deep blue region with a color purity of 70%. The conductivity of the optimized PGM3 nanocomposite was enhanced by 184.43% as compared to pristine PANI. These results justified that the optimized PGM3 nanocomposite is a suitable candidate as an effective electron transport layer for high performance in organic light-emitting diode (OLED) devices.