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 |
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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. |
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ISSN: | 0169-4332 1873-5584 |
DOI: | 10.1016/j.apsusc.2004.10.099 |