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Proceedings Paper

Novel techniques in fabricating more efficient and brighter organic electroluminescent devices
Author(s): Ghassan E. Jabbour; Sean E. Shaheen; Yutaka Kawabe; Michael M. Morrell; Seong Jin Cho; Jennifer F. Wang; Bernard Kippelen; Nasser Peyghambarian
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Paper Abstract

In this paper, we present two techniques for fabricating efficient and bright organic light emitting devices. The first technique allows for an enhancement in the electron injection process. This is accomplished through inserting a layer of LiF with appropriate thickness between the cathode and a quinacridone doped organic layer. Devices with an Al/LiF cathode demonstrated a luminance in excess of 20,000 cd/m2 and an external quantum efficiency of 3 percent, which is comparable to devices with a Mg/LiF cathode. These devices show maximum luminance of 45,000 cd/m2 prior to failure in continuous bias operation. In the second technique, partially ionized beam deposition was utilized in the fabrication process of organic electroluminescent devices. Preliminary results indicate that devices fabricated with this technique are more efficient and brighter than similar devices fabricated with the traditional thermal evaporation process.

Paper Details

Date Published: 1 December 1997
PDF: 12 pages
Proc. SPIE 3148, Organic Light-Emitting Materials and Devices, (1 December 1997); doi: 10.1117/12.284169
Show Author Affiliations
Ghassan E. Jabbour, Optical Sciences Ctr./Univ. of Arizona (United States)
Sean E. Shaheen, Optical Sciences Ctr./Univ. of Arizona (United States)
Yutaka Kawabe, Optical Sciences Ctr./Univ. of Arizona (United States)
Michael M. Morrell, Optical Sciences Ctr./Univ. of Arizona (United States)
Seong Jin Cho, Optical Sciences Ctr./Univ. of Arizona (United States)
Jennifer F. Wang, Optical Sciences Ctr./Univ. of Arizona (United States)
Bernard Kippelen, Optical Sciences Ctr./Univ. of Arizona (United States)
Nasser Peyghambarian, Optical Sciences Ctr./Univ. of Arizona (United States)


Published in SPIE Proceedings Vol. 3148:
Organic Light-Emitting Materials and Devices
Zakya H. Kafafi, Editor(s)

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