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Innovative Organic MEH-PPV Heterojunction Device Made by USP and PVD

Authors
  • Meftah, S. E.1, 2
  • Benhaliliba, M.1, 2
  • Kaleli, M.3
  • Benouis, C. E.1, 2
  • Yavru, C. A.3
  • Bayram, A. B.3
  • 1 Oran University of Sciences and Technology USTO-MB,
  • 2 Film Device Fabrication-Characterization and Application FDFCA Research Group USTO, 31130 Oran, Algeria
  • 3 Süleyman Demirel University,
Type
Published Article
Journal
Journal of Electronic Materials
Publisher
Springer US
Publication Date
Jan 31, 2021
Pages
1–8
Identifiers
DOI: 10.1007/s11664-021-08738-6
PMID: 33551540
PMCID: PMC7847741
Source
PubMed Central
Keywords
License
Unknown

Abstract

An Al/ p -Si/poly[2-methoxy-5-(2-ethylhexoxy)- p -phenylenevinylene] (MEH-PPV)/Ag organic heterojunction has been prepared using homemade ultrasonic spray pyrolysis (USP) equipment for deposition of the organic thin film and physical vapor deposition (PVD) for the metallic contacts. The organic layer produced on glass was analyzed by optical and morphological methods. The bandgap of the organic thin film was found to be ~ 2.03 eV with a thickness of around 140 nm, using ultraviolet–visible (UV–Vis) and scanning electron microscopy (SEM) characterization, respectively. The amorphous nature of the MEH-PPV polymer was confirmed by its x-ray diffraction pattern. To determine the electrical parameters, the heterojunction based on MEH-PPV was characterized by current–voltage ( I – V ) and capacitance–voltage ( C – V ) measurements in the dark at room temperature. The ideality factor and barrier height of the organic heterojunction were found to be 3.6 eV and 0.56 eV to 0.59 eV, respectively, with an average series resistance of 94.39 Ω, based on the I – V characteristics. The barrier height was also calculated based on the capacitance–voltage measurements, yielding slightly different results due to the applied frequencies of 10 kHz ( \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\phi_{{\text{B}}} = 0.50$$\end{document} ϕ B = 0.50 ) and 1 MHz \documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$(\phi_{{\text{B}}} = 0.74) $$\end{document} ( ϕ B = 0.74 ) , respectively.

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