Inverted top-emitting organic light-emitting diodes using transparent conductive NiO electrode

We report on a top-emitting organic light-emitting device (TE-OLED) using a thermally evaporated and semi-transparent NiO film as a top-electrode. Our TE-OLED was fabricated, basically taking the reverse sequence for the fabrication of a conventional bottom-emitting organic light-emitting device (BE...

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Veröffentlicht in:Applied surface science 2005-05, Vol.244 (1), p.439-443
Hauptverfasser: Park, Se-W., Choi, Jeong-M., Kim, Eugene, Im, Seongil
Format: Artikel
Sprache:eng
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Zusammenfassung:We report on a top-emitting organic light-emitting device (TE-OLED) using a thermally evaporated and semi-transparent NiO film as a top-electrode. Our TE-OLED was fabricated, basically taking the reverse sequence for the fabrication of a conventional bottom-emitting organic light-emitting device (BE-OLED). Since the resultant sheet resistance of our NiO was high (8 kΩ/□) and its transmittance was only 50%, the resulting luminance (∼150 cd/m 2) and injection current (∼50 mA/cm 2) of our TE-OLED were much inferior to those of the BE-OLED device. However, its top-emitting was clearly observable and is thus concluded that our TE-OLED using thermally evaporated NiO, is quite promising if the NiO is controlled to have lower sheet resistance than the present value.
ISSN:0169-4332
1873-5584
DOI:10.1016/j.apsusc.2004.10.099