Abstract:
An organic light emitting diode (OLED) may include a first electrode, a hole injection layer on the first electrode, an emission layer on the hole injection layer, an electron injection layer on the emission layer, and a second electrode on the electron injection layer, wherein an absolute value of a difference between a work function of the first electrode and a work function of the second electrode is less than 0.5 eV, and at least one of the hole injection layer and the electron injection layer is a multilayer.
Abstract:
A donor substrate for use in a Laser Induced Thermal Imaging method includes a transfer film that includes a light-emitting layer made up of a host substance that includes a matrix material and a low molecular weight transporter, and a phosphorescent dopant. The transfer film is transferred in the formation of an organic EL device which includes a first electrode, a hole transport layer, a light-emitting layer, and the second electrode, wherein the light-emitting layer includes the light-emitting film. Accordingly, the light-emitting layer can be patterned, and a color purity and light emitting characteristics of a full color organic polymer EL device, produced through a laser induced thermal imaging operating, can be improved.
Abstract:
A laser induced thermal imaging apparatus for fabricating an organic light emitting display is provided. The laser induced thermal imaging apparatus includes a stage where a substrate is positioned; a transport device for transporting a donor substrate; a laminator for laminating the substrate to the donor substrate; a laser optical unit for performing the LITI, and a chamber supplied with an atmospheric pressure of an inert gas in which the stage, the laminator, and the laser optical unit are positioned.
Abstract:
An organic light emitting display and method of fabricating the same are disclosed. The light emitting display includes: a substrate having a display region and a circuit measuring pad region; source and drain electrodes arranged above the display region and a first conductive layer arranged above the circuit measuring pad region on the same layer as the source and drain electrodes; a first insulating layer on the source and drain electrodes and the first conductive layer; first and second via holes formed in the first insulating layer, the first via hole exposing the source or drain electrode, the second via hole exposing the first conductive layer; a pixel electrode contacting the source or drain electrode through the first via hole, and a second conductive layer contacting the first conductive layer through the second via hole; and a pixel defining layer which exposes the pixel electrode and formed on the second conductive layer.
Abstract:
A donor substrate for a laser induced thermal imaging method and an organic light emitting display (OLED) fabricated using the donor substrate are provided. There is also provided a method of fabricating an OLED capable of controlling static electricity when an organic layer is formed using an laser induced thermal imaging method, since the donor substrate having a conductive layer is electrically connected to an earthed stage.
Abstract:
An Organic Light Emitting Display (OLED) and its fabrication method has a pixel defining layer provided on a first electrode which is formed with a gas vent groove to allow gas to vent when the pixel defining layer is being formed, so that gas is not left in a pixel but vented when a donor film is laminated by a Laser-Induced Thermal Imaging (LITI) method, thereby decreasing edge open failures.
Abstract:
A donor substrate for use in an organic light emitting display comprises a base substrate and a transfer layer disposed on the base substrate. A selective heat generation structure is interposed between the base substrate and the transfer layer. The selective heat generation structure has a heat generation region from which heat is generated by light-to-heat conversion and a heat non-generation region contacting the heat generation region. By employing the donor substrate, it is possible to form minute transfer layer patterns with high accuracy without the need to accurately control the width of a laser beam. A fabrication method of an organic light emitting display comprises disposing the donor substrate on an acceptor substrate, irradiating a laser beam onto the donor substrate, and forming a transfer layer pattern on a pixel electrode of the acceptor substrate.
Abstract:
In one embodiment, an organic light emitting display (OLED) includes a thin film transistor (TFT) disposed on a substrate. In additiona, the display includes: an insulating layer disposed on the TFT and having a via hole; a pixel electrode disposed on the insulating layer and connected to a drain electrode of the TFT through the via hole; an emission layer disposed on the pixel electrode; and an opposite electrode pattern disposed on the emission layer and exposing at least an upper region of the via hole. This avoids close configuration proximity between the opposite electrode and the pixel layer thus reducing the possibility of a short circuit.
Abstract:
An organic light emitting display and method of fabricating the same are provided. The OLED and method of fabricating the same is capable of forming an inorganic pixel defining layer having an opening for exposing at least a portion of the first electrode and making the inorganic pixel defining layer have a curved top surface without breakpoints. Since the top surface of the inorganic pixel defining layer has the curved cross-section without breakpoints, the first electrode and the organic layer pattern are closely adhered during a laser induced thermal imaging process to enable the transfer using a laser beam having low energy, thereby improving transfer efficiency, improving luminous efficiency of the OLED, and increasing lifetime of the OLED.
Abstract:
A donor substrate for a laser induced thermal imaging method and method of fabricating an organic light emitting display device using the same are provided. A transfer layer for a laser induced thermal imaging method is made of an organic material having a molecular weight of 500 to 70,000 to fabricate an organic light emitting display device having a uniform organic layer pattern. The invention also provides a method of fabricating an organic light emitting display device which may achieve a large-sized pixel region as well as improve the productivity of the organic light emitting display device.