Motorola Corporation

Vi-en Choong

Song Q Shi

Franky So

Hsing-Chung Lee

George N Maracas

Ji-Hai Xu

Timothy P Burgin

Thomas M Mance

An organic EL device includes a cathode, an organic electroluminescent layer and an anode, laminated in sequence. The organic layer is composed of a continuous organic medium A,B,C,, where A, B and C are components capable of transporting electrons and holes and a hole injecting component, respectively, x represents the content of the A component with a value ranging from 0 adjacent the anode to 100% adjacent the cathode, y represents the content of the B component with a value ranging from 0 adjacent the cathode to 100% adjacent the anode, and z represents the content of the C component and is a maximum adjacent the anode. The C component includes a hole injecting component such as porphyrinic compound, for example one of CuPc and MgPc.

Organic electroluminescent device with improved reliability

An organic EL device includes a cathode, an organic electroluminescent layer and an anode, laminated in sequence. The organic layer is composed of a continuous organic medium A.sub.x B.sub.y, where A and B are components capable of transporting electrons and holes, respectively, x represents the content of the A component with a value ranging from 0 adjacent the anode to 100% adjacent the cathode, and y represents the content of the B component with a value ranging from 0 adjacent the cathode to 100% adjacent the anode. Rubrene or a rubrene derivative of high fluorescent efficiency is incorporated in the organic layer to improve efficiency of the luminescence.

Organic electroluminescent device with continuous organic medium

An organic electroluminescent device with enhanced performance includes anode and cathode electrodes with organic material, single or multiple layers, positioned therebetween and in juxtaposition to each of the electrodes. The organic material is doped with an AMC dopant with a concentration in a range of approximately 0.1 Wt % to 15 Wt % in a region of the organic material adjacent to the cathode electrode. This doped region has a thickness in a range of approximately 20 .ANG. to 600 .ANG.. The dopant includes either a low work function alkaline metal compound, such as LiF, LiCl, KBr, MgF.sub.2, LiO.sub.2, MgO.sub.x, CaO.sub.x, and CsO.sub.x or a low work function alkaline metal alloy, such as Li--Al, Li--In, Sr--Al, Cs--Al.

Organic electroluminescent device with enhanced performance

A micro-contact printing apparatus includes a pressure chamber with a micro-contact printing stamp, a vacuum chuck, elastomeric membrane and mechanical stops attached to the vacuum chuck and positioned within the chamber. An extractor pin is attached to the chamber and accessible externally. The micro-contact printing stamp includes a flexible layer made from an elastomer with a stamping surface and attached to a support structure. A method for micro-contact printing a substrate surface includes advancing the substrate surface toward the stamping surface and contacting mechanical stops with support structure before the substrate surface physically contacts the stamping surface. Springs of members adjust the position of the substrate surface to be parallel with the stamping surface. The membrane is inflated to physically contact the substrate surface with the stamping surface, in such a manner that complete adhesion of the stamping surface to the substrate surface is achieved. The extractor pin is used to disengage the substrate surface from the stamping surface at the chamber pressure used in micro-contact printing, so that distortion of the printing pattern is minimized.

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Tempe, AZ, United States of America

Vi-en Choong