Electron injection enhancement by diamond-like carbon film in organic electroluminescence devices

Dong Won Han, Soon Moon Jeong, Hong Koo Baik, Se Jong Lee, Nam Choul Yang, Dong Hack Suh

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Diamond-like carbon (DLC) is deposited as an electron injection layer between the organic layer and Al cathode electrode in organic electroluminescence devices (OLEDs) by the use of Cs+ ion gun sputter deposition system. The devices consist of; indium tin oxide/PEDOT:PSS/MEH-PPV/DLC/aluminum. Electron injection properties have been investigated by I-V characteristics at various deposition conditions and the mechanism of electron injection enhancement due to a thin DLC layer has been studied. The characteristics of DLC film deposited at various negative carbon ion energies are examined by Raman spectroscopy. Optical microscope is also used to observe the Al surface after the light emission test. It is found that the sp2/sp3 ratio and electron affinity of DLC film are varied as the carbon ion energy increases from 50 to 200 eV, which enhance the electron injection and improve the property of OLEDs. An order magnitude increase in current is obtained from DLC layer inserted devices and the device stability is also improved.

Original languageEnglish
Pages (from-to)190-194
Number of pages5
JournalThin Solid Films
Volume420-421
DOIs
Publication statusPublished - 2002 Dec 2

Fingerprint

Diamond like carbon films
Electron injection
Electroluminescence
electroluminescence
Diamond
Carbon
diamonds
injection
augmentation
carbon
Diamonds
electrons
Ions
Electron affinity
Sputter deposition
Light emission
Ion sources
Tin oxides
Aluminum
Indium

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Materials Chemistry

Cite this

Han, Dong Won ; Jeong, Soon Moon ; Baik, Hong Koo ; Lee, Se Jong ; Yang, Nam Choul ; Suh, Dong Hack. / Electron injection enhancement by diamond-like carbon film in organic electroluminescence devices. In: Thin Solid Films. 2002 ; Vol. 420-421. pp. 190-194.
@article{05ae79fc3eec4adb82c3b35ee340e379,
title = "Electron injection enhancement by diamond-like carbon film in organic electroluminescence devices",
abstract = "Diamond-like carbon (DLC) is deposited as an electron injection layer between the organic layer and Al cathode electrode in organic electroluminescence devices (OLEDs) by the use of Cs+ ion gun sputter deposition system. The devices consist of; indium tin oxide/PEDOT:PSS/MEH-PPV/DLC/aluminum. Electron injection properties have been investigated by I-V characteristics at various deposition conditions and the mechanism of electron injection enhancement due to a thin DLC layer has been studied. The characteristics of DLC film deposited at various negative carbon ion energies are examined by Raman spectroscopy. Optical microscope is also used to observe the Al surface after the light emission test. It is found that the sp2/sp3 ratio and electron affinity of DLC film are varied as the carbon ion energy increases from 50 to 200 eV, which enhance the electron injection and improve the property of OLEDs. An order magnitude increase in current is obtained from DLC layer inserted devices and the device stability is also improved.",
author = "Han, {Dong Won} and Jeong, {Soon Moon} and Baik, {Hong Koo} and Lee, {Se Jong} and Yang, {Nam Choul} and Suh, {Dong Hack}",
year = "2002",
month = "12",
day = "2",
doi = "10.1016/S0040-6090(02)00751-4",
language = "English",
volume = "420-421",
pages = "190--194",
journal = "Thin Solid Films",
issn = "0040-6090",
publisher = "Elsevier",

}

Electron injection enhancement by diamond-like carbon film in organic electroluminescence devices. / Han, Dong Won; Jeong, Soon Moon; Baik, Hong Koo; Lee, Se Jong; Yang, Nam Choul; Suh, Dong Hack.

In: Thin Solid Films, Vol. 420-421, 02.12.2002, p. 190-194.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Electron injection enhancement by diamond-like carbon film in organic electroluminescence devices

AU - Han, Dong Won

AU - Jeong, Soon Moon

AU - Baik, Hong Koo

AU - Lee, Se Jong

AU - Yang, Nam Choul

AU - Suh, Dong Hack

PY - 2002/12/2

Y1 - 2002/12/2

N2 - Diamond-like carbon (DLC) is deposited as an electron injection layer between the organic layer and Al cathode electrode in organic electroluminescence devices (OLEDs) by the use of Cs+ ion gun sputter deposition system. The devices consist of; indium tin oxide/PEDOT:PSS/MEH-PPV/DLC/aluminum. Electron injection properties have been investigated by I-V characteristics at various deposition conditions and the mechanism of electron injection enhancement due to a thin DLC layer has been studied. The characteristics of DLC film deposited at various negative carbon ion energies are examined by Raman spectroscopy. Optical microscope is also used to observe the Al surface after the light emission test. It is found that the sp2/sp3 ratio and electron affinity of DLC film are varied as the carbon ion energy increases from 50 to 200 eV, which enhance the electron injection and improve the property of OLEDs. An order magnitude increase in current is obtained from DLC layer inserted devices and the device stability is also improved.

AB - Diamond-like carbon (DLC) is deposited as an electron injection layer between the organic layer and Al cathode electrode in organic electroluminescence devices (OLEDs) by the use of Cs+ ion gun sputter deposition system. The devices consist of; indium tin oxide/PEDOT:PSS/MEH-PPV/DLC/aluminum. Electron injection properties have been investigated by I-V characteristics at various deposition conditions and the mechanism of electron injection enhancement due to a thin DLC layer has been studied. The characteristics of DLC film deposited at various negative carbon ion energies are examined by Raman spectroscopy. Optical microscope is also used to observe the Al surface after the light emission test. It is found that the sp2/sp3 ratio and electron affinity of DLC film are varied as the carbon ion energy increases from 50 to 200 eV, which enhance the electron injection and improve the property of OLEDs. An order magnitude increase in current is obtained from DLC layer inserted devices and the device stability is also improved.

UR - http://www.scopus.com/inward/record.url?scp=20244365288&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=20244365288&partnerID=8YFLogxK

U2 - 10.1016/S0040-6090(02)00751-4

DO - 10.1016/S0040-6090(02)00751-4

M3 - Article

VL - 420-421

SP - 190

EP - 194

JO - Thin Solid Films

JF - Thin Solid Films

SN - 0040-6090

ER -