Organic Light-Emitting Diodes Using Semi-Transparent Anode for Flexible Display

arjun — Fri, 07 Nov 2008 19:02:07 +0000

Abstract We studied EL properties of organic light-emitting diodes using a semi-transparent metal anode and conductive polymer instead of indium tin oxide. A metal anode and conductive polymer are thought to be more suitable for flexible organic light-emitting diodes than indium tin oxide. We fabricated organic light-emitting diodes using a semi-transparent metal anode and conductive polymer anode by vacuum-deposition method and spin-coat method, respectively. Ag thin film is one of optimal metals for the transparent anode because Ag has the lowest resistivity in all metals. The transmittance of composite anode can be improved by combining Ag thin film and an oxide semiconductor with high refractive index. We chose TiOz with a high rehctive index as a semiconductor. A conductive polymer read more

High-Resolution, Multicolor Organic LED Displays

arjun — Fri, 07 Nov 2008 18:53:27 +0000

Abstract The commercial potential of small format, bright, low power consumptialn displays drives Kodak’s investment in thin-film, low-molecular weight organic electroluminescenl devices. The prototypical small-molecule organic light emitting diode (OLED) consists of a transparent hole-injecting electrode, indium tin oxide (ITO), followed in sequence by the hole-transport layer :N,N-bis( 1 -Naphthyl)-N,N’- bis(pheny1)benzidine (abbreviated NPB), the electron tri~nsport layer tris(8- hydroxyquino1ine)aluinum (AlQ3), and a low work function metal electrode, MgAg( 10: 1)’. To achieve greatest market impact, we must develop efficient, high resolution, multicolor displaysbased on this technology. Consider a 5 cm diagonal VGA (640×480 columns by rows) display. Each read more

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Organic Light-Emitting Diodes Using Semi-Transparent Anode for Flexible Display

High-Resolution, Multicolor Organic LED Displays