Improved stability of organic light-emitting diode with aluminum cathodes prepared by ion beam assisted deposition

Soon Moon Jeong, Deuk Yeon Lee, Won Hoe Koo, Sang Hun Choi, Hong Koo Baik, Se Jong Lee, Kie Moon Song

Research output: Contribution to journalArticle

4 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 an increase in the contact area between Al and PPV that reduce the contact resistance. 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)97-102
Number of pages6
JournalScience and Technology of Advanced Materials
Volume6
Issue number1
DOIs
Publication statusPublished - 2005 Jan 1

Fingerprint

Ion beam assisted deposition
Organic light emitting diodes (OLED)
Aluminum
Cathodes
Luminescent devices
Thermal evaporation
Contact resistance
Buffer layers
Permeation
Electric properties
Ions
Thin films
Defects

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

Cite this

Jeong, Soon Moon ; Lee, Deuk Yeon ; Koo, Won Hoe ; Choi, Sang Hun ; Baik, Hong Koo ; Lee, Se Jong ; Song, Kie Moon. / Improved stability of organic light-emitting diode with aluminum cathodes prepared by ion beam assisted deposition. In: Science and Technology of Advanced Materials. 2005 ; Vol. 6, No. 1. pp. 97-102.
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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 an increase in the contact area between Al and PPV that reduce the contact resistance. 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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Improved stability of organic light-emitting diode with aluminum cathodes prepared by ion beam assisted deposition. / Jeong, Soon Moon; Lee, Deuk Yeon; Koo, Won Hoe; Choi, Sang Hun; Baik, Hong Koo; Lee, Se Jong; Song, Kie Moon.

In: Science and Technology of Advanced Materials, Vol. 6, No. 1, 01.01.2005, p. 97-102.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Improved stability of organic light-emitting diode with aluminum cathodes prepared by ion beam assisted deposition

AU - Jeong, Soon Moon

AU - Lee, Deuk Yeon

AU - Koo, Won Hoe

AU - Choi, Sang Hun

AU - Baik, Hong Koo

AU - Lee, Se Jong

AU - Song, Kie Moon

PY - 2005/1/1

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N2 - 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 an increase in the contact area between Al and PPV that reduce the contact resistance. In conclusion, the lifetime of organic light-emitting device (OLED) has been extended effectively by dense Al film through ion beam assisted deposition process.

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 an increase in the contact area between Al and PPV that reduce the contact resistance. 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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