Articles
  • Analysis of morphological and electrical properties of optoelectronic devices with trimethoxy(proply)silane

  • Myung-Gyun Baeka, Sang-Seok Yunb, Jin-Sa Kimc, and Hong-Gyu Parkd,e, Sang-Geon Parkf,*

  • a Department of Materials Science and Engineering, Changwon National University, Changwon 51140, Korea
    b Department of Mechanical Convergence Engineering, Silla University, Busan 46958, Korea
    c Department of Automation System Engineering, Chosun College of Science & Technology, Gwangju, 61453, Korea
    d Department of Smart Manufacturing Engineering, Changwon National University, Changwon, 51140, Korea
    e Department of Electrical, Electronic, Control Engineering, Changwon National University, Changwon, 51140, Korea
    f Department of Mechatronics Convergence, Changwon National University, Changwon, 51140, Korea

  • This article is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

In this study, we investigated the deposition of trimethoxy(propyl)silane as a self-assembled monolayer (SAM) on the surface of an indium tin oxide (ITO) substrate in organic light-emitting diodes (OLEDs) by examining the changes in surface characteristics of the modified substrate with variations in deposition time and temperature. The highest contact angle was obtained at 160 oC, and for each deposition time, the contact angles were 63o, 66o, 80o, 96o, 103o, 103o, 103o, and 104o, respectively, indicating the contact angle, and thus the hydrophobicity, increased with increasing deposition time and temperature. In addition, after 90 min of deposition, adequate SAM coverage was achieved on the ITO surface. When the coverage ratio was calculated, ≥ 99% coverage was obtained after 90 min of deposition at 160 oC. Atomic force microscopy of samples with SAM coverage obtained after 90 min at different deposition tem-peratures revealed improvement in the surface roughness of the fabricated samples. The work function, measured using a photoelectron spectrometer, demonstrated a characteristic increase with increasing temperature. Thus, SAM deposition can improve the ITO surface properties depending on the time and temperature of deposition


Keywords: Organic Light-Emitting Diodes, Self-assembled monolayers, Indium tin oxide, Hole-injection layer

This Article

  • 2022; 23(3): 320-325

    Published on Jun 30, 2022

  • 10.36410/jcpr.2022.23.3.320
  • Received on Dec 21, 2021
  • Revised on Feb 21, 2022
  • Accepted on Feb 22, 2022

Correspondence to

  • Sang-Geon Park

  • Department of Mechatronics Convergence, Changwon National University, Changwon, 51140, Korea
    Tel : +82-10-5954-8030 Fax: +82-55-213-3849

  • E-mail: sgpark@changwon.ac.kr