Charge injection and transport model in organic light-emitting diodes with aluminum cathodes prepared by ion beam assisted deposition

Soon Moon Jeong, Won Hoi Koo, Sang Hun Choi, Sung Jin Jo, Hong Koo Baik, Se Jong Lee, Kie Moon Song

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We have fabricated highly stable organic electroluminescent devices based on spin-coated poly-p-phenylene-vynylene (PPV) thin films. The electrical properties of aluminum cathode, prepared by ion beam assisted deposition, on PPV have been investigated and compared to those by thermal evaporation. Although energetic particles of Al assisted by Ar+ ion may damage the organic material, I- V-L characteristics are improved by applying thin Al buffer layer. In addition, a dense Al cathode inhibits the permeation of H2O and O2 into PPV film through pinhole defects, and thus retards dark spot growth. It may be deduced from highly packed structure of Al cathode with smaller junction resistance between Al and PPV. In conclusion, the lifetime of organic light-emitting device (OLED) has been extended effectively by dense Al film through ion beam assisted deposition process.

Original languageEnglish
Pages (from-to)205-212
Number of pages8
JournalSolid-State Electronics
Volume49
Issue number2
DOIs
Publication statusPublished - 2005 Feb 1

Fingerprint

Ion beam assisted deposition
Charge injection
Organic light emitting diodes (OLED)
Aluminum
Charge transfer
Cathodes
light emitting diodes
cathodes
ion beams
injection
aluminum
Luminescent devices
Thermal evaporation
pinholes
Buffer layers
energetic particles
organic materials
Permeation
Electric properties
buffers

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering
  • Materials Chemistry

Cite this

Jeong, Soon Moon ; Koo, Won Hoi ; Choi, Sang Hun ; Jo, Sung Jin ; Baik, Hong Koo ; Lee, Se Jong ; Song, Kie Moon. / Charge injection and transport model in organic light-emitting diodes with aluminum cathodes prepared by ion beam assisted deposition. In: Solid-State Electronics. 2005 ; Vol. 49, No. 2. pp. 205-212.
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abstract = "We have fabricated highly stable organic electroluminescent devices based on spin-coated poly-p-phenylene-vynylene (PPV) thin films. The electrical properties of aluminum cathode, prepared by ion beam assisted deposition, on PPV have been investigated and compared to those by thermal evaporation. Although energetic particles of Al assisted by Ar+ ion may damage the organic material, I- V-L characteristics are improved by applying thin Al buffer layer. In addition, a dense Al cathode inhibits the permeation of H2O and O2 into PPV film through pinhole defects, and thus retards dark spot growth. It may be deduced from highly packed structure of Al cathode with smaller junction resistance between Al and PPV. In conclusion, the lifetime of organic light-emitting device (OLED) has been extended effectively by dense Al film through ion beam assisted deposition process.",
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Charge injection and transport model in organic light-emitting diodes with aluminum cathodes prepared by ion beam assisted deposition. / Jeong, Soon Moon; Koo, Won Hoi; Choi, Sang Hun; Jo, Sung Jin; Baik, Hong Koo; Lee, Se Jong; Song, Kie Moon.

In: Solid-State Electronics, Vol. 49, No. 2, 01.02.2005, p. 205-212.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Charge injection and transport model in organic light-emitting diodes with aluminum cathodes prepared by ion beam assisted deposition

AU - Jeong, Soon Moon

AU - Koo, Won Hoi

AU - Choi, Sang Hun

AU - Jo, Sung Jin

AU - Baik, Hong Koo

AU - Lee, Se Jong

AU - Song, Kie Moon

PY - 2005/2/1

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AB - We have fabricated highly stable organic electroluminescent devices based on spin-coated poly-p-phenylene-vynylene (PPV) thin films. The electrical properties of aluminum cathode, prepared by ion beam assisted deposition, on PPV have been investigated and compared to those by thermal evaporation. Although energetic particles of Al assisted by Ar+ ion may damage the organic material, I- V-L characteristics are improved by applying thin Al buffer layer. In addition, a dense Al cathode inhibits the permeation of H2O and O2 into PPV film through pinhole defects, and thus retards dark spot growth. It may be deduced from highly packed structure of Al cathode with smaller junction resistance between Al and PPV. In conclusion, the lifetime of organic light-emitting device (OLED) has been extended effectively by dense Al film through ion beam assisted deposition process.

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