Abstract:
The present invention provides OLEDs incorporating microcavities. By combining a microcavity with a non-microcavity emissive layer, improved saturation and luminance may be achieved. OLEDs incorporating microcavities according to the invention may be used to produce white light, and as sub-pixels in full-color displays.
Abstract:
The present invention provides an OLED with an emissive region comprising a plurality of sets of organic layers, each set comprising a non-continuous emissive layer and a neat non-emissive layer. The present invention also provides an OLED with an emissive region comprising a plurality of sets of organic layers, each set comprising an emissive layer and a neat non-emissive layer, wherein the energy gaps of the emissive layer and the non-emissive layer are not nested. The present invention also provides a method for making OLEDs by depositing on a substrate an anode, a plurality of sets of organic layers, each set comprising an emissive layer and a non-emissive layer wherein each layer is deposited sequentially, and a cathode.
Abstract:
The present invention relates to efficient organic light emitting devices (OLEDs) doped with multiple light-emitting dopants, at least one dopant comprising a phosphorescent emitter, in a thin film emissive layer or layers. The present invention is directed to an efficient phosphorescent organic light emitting device utilizing a plurality of emissive dopants in an emissive region, wherein at least one of the dopants is a phosphorescent material. Thus, the present invention provides an organic light emitting device comprising an emissive region, wherein the emissive region comprises a host material, and a plurality of emissive dopants, wherein the emissive region is comprised of a plurality of bands and each emissive dopant is doped into a separate band within the emissive region, and wherein at least one of the emissive dopants emits light by phosphorescence.
Abstract:
The present invention is directed to multi-layer organic devices having improved stability, wherein at least one layer of the device comprises a host material that is morphologically unstable and a dopant material that provides improved morphological properties to the layer. The layer may be incorporated into, for example, OLEDs, organic phototransistors, organic photovoltaic cells, and organic photodetectors.
Abstract:
A device that may be used as a multi-color pixel is provided. The device has a first organic light emitting device, a second organic light emitting device, a third organic light emitting device, and a fourth organic light emitting device. The device may be a pixel of a display having four sub-pixels. The first device may emit red light, the second device may emit green light, the third device may emit light blue light and the fourth device may emit deep blue light.
Abstract:
An organic light emitting device is provided. The device includes an anode and a cathode. A first organic layer is disposed between the anode and the cathode. The first organic layer is an emissive layer that includes a first organic emitting material. The device also includes a second organic layer disposed between the anode and the first organic layer. The second organic layer is a non-emissive layer. The second organic layer includes an organic small molecule hole transport material having a concentration of 50 to 99 wt %, and an organic small molecule electron transport material having a concentration of 0.1 to 5 wt %. Other materials may be present.
Abstract:
A device is provided. The device includes an anode, a cathode and a double emissive layer disposed between the anode and the cathode. The double emissive layer includes a first organic emissive layer and a second organic emissive layer. The second organic emissive layer is disposed between the anode and the cathode, and is adjacent to the first organic emissive layer. The device also includes a blocking layer disposed adjacent to the second organic emissive layer and between the second organic emissive layer and the anode. The device also includes a hole transport layer disposed between the blocking layer and the anode. At least one of the anode and the cathode is transmissive.
Abstract:
An organic light emitting device is provided. The device has a first electrode, a second electrode, and an emissive layer disposed between the first and second electrodes. The emissive layer includes an emissive material with an intrinsic emission spectrum having a peak emission wavelength in the visible spectrum less than 500 nm. The device includes a color saturation enhancement layer in direct contact with the first electrode. The color saturation enhancement layer consists essentially of one or more metals or conductive doped inorganic semiconductors, and has an index of refraction at least 0.2 different from that of the organic layers. The color saturation enhancement layer has a thickness of 1-10 nm. The reflectivity of the color saturation enhancement layer is in the range 5% to 30% for the peak wavelength in the intrinsic emission spectrum of the emissive material. Preferably, the color saturation enhancement layer is disposed between the first and second electrodes.
Abstract:
A device is provided, having an anode, a cathode, and an intermediate connector disposed between the anode and the cathode. A first organic layer including an emissive sublayer is disposed between the anode and the intermediate connector, and a second including an emissive sublayer is disposed between the intermediate connector and the cathode. The intermediate connector includes a first metal having a work function lower than 4.0 eV and a second metal having a work function lower than 5.0 eV. The work function of the first metal is at least 0.5 eV less than the work function of the second metal. The first metal is in contact with a sublayer of the second organic layer that includes a material well adapted to receive holes from a low work function metal.
Abstract:
An organic light emitting device is provided. The device includes an anode and a cathode. A first emissive layer is disposed between the anode and the cathode. The first emissive layer includes a first non-emitting organic material, which is an organometallic material present in the first emissive layer in a concentration of at least 50 wt %. The first emissive layer also includes a first emitting organic material. A second emissive layer is disposed between the first emissive layer and the cathode, preferably, in direct contact with the first emissive layer. The second emissive material includes a second non-emitting organic material and a second emitting organic material. The first and second non-emitting materials, and the first and second emitting materials, are all different materials. A first non-emissive layer is disposed between the first emissive layer and the anode, and in direct contact with the first emissive layer. The first non- emissive layer comprises the first non-emissive organic material.