The present invention provides a heterocyclic compound and an organic light-emitting device including the heterocyclic compound. The organic light-emitting devices using the heterocyclic compounds have high-efficiency, low driving voltage, high luminance and long lifespan.

Organic light-emitting device

An organic light emitting display apparatus that has high (or improved) contrast and/or impact resistance. The organic light emitting display apparatus includes: a substrate; an organic light emitting device on the substrate to display an image; a sealing member on the organic light emitting device; a semitransparent film on a surface of the sealing member facing away from the organic light emitting device to transmit a portion of external light and to reflect another portion of the external light; a passivation film on the semitransparent film to protect the semitransparent film; and a transmissive black layer between the sealing member and the organic light emitting device to increase contrast, wherein the semitransparent film has a refractive index greater than that of the passivation film.

Organic light emitting display apparatus

A light-emitting element of the present invention can have sufficiently high emission efficiency with a structure including a host material being able to remain chemically stable even if a phosphorescent compound having higher emission energy is used as a guest material. The relation between the relative emission intensity and the emission time of light emission obtained from the host material and the guest material contained in a light-emitting layer is represented by a multicomponent decay curve. The relative emission intensity of the slowest component of the multicomponent decay curve becomes 1/100 for a short time within a range where the slowest component is not interfered with by quenching of the host material (the emission time of the slowest component is preferably less than or equal to 15 μsec); thus, sufficiently high emission efficiency can be obtained.

Light emitting element, light emitting device, electronic device, and lighting device

The light-emitting element of the present invention includes a light-emitting layer and a layer for controlling movement of carriers between a pair of electrodes. The layer for controlling movement of carriers includes a first organic compound having a carrier transporting property and a second organic compound for reducing the carrier transporting property of the first organic compound, and the second organic compound is dispersed in the first organic compound. The layer for controlling movement of carriers is provided in such a manner, whereby change in carrier balance with time can be suppressed. Therefore, a light-emitting element having a long lifetime can be obtained.

Light-emitting element, light-emitting device, and electronic device

An organic light emitting diode display includes a substrate. A control electrode is on the substrate. A gate insulating film covers the control electrode. An input electrode and an output electrode are on the gate insulating film and face each other. An oxide semiconductor is between the input electrode and the output electrode and on the control electrode. A pixel electrode is on portions of the edges of the output electrode and is electrically connected. An organic light emitting member is on the pixel electrode. A common electrode is on the organic light emitting member. The oxide semiconductor and the pixel electrode may be of the same layer.

Organic Light Emitting Diode Display and Manufacturing Method Thereof

An organic light-emitting device comprising an anode; a cathode; a hole-transporting layer disposed between the anode and the cathode; a phosphorescent light-emitting layer disposed between the hole-transporting layer and the cathode, wherein the phosphorescent light-emitting layer includes at least one host and at least one phosphorescent dopant; a first exciton-blocking layer disposed between the hole-transporting layer and the phosphorescent light-emitting layer; wherein the first exciton-blocking layer has a triplet energy greater than the triplet energy of the host in the phosphorescent light-emitting layer; and a second exciton-blocking layer disposed between the first exciton-blocking layer and the phosphorescent light-emitting layer, wherein the second exciton-blocking layer is in contact with the phosphorescent light-emitting layer, and wherein the second exciton-blocking layer has a triplet energy less than the triplet energy of the first exciton-blocking layer.

Phosphorescent oled having double exciton-blocking layers

An organic light-emitting device has a first hole-blocking layer in contact with a phosphorescent light-emitting layer and a second hole-blocking layer in contact with the first. The material in the first hole-blocking layer has a triplet energy greater than the host of the phosphorescent layer and the material in the second hole-blocking layer has a triplet energy higher than the dopant in the phosphorescent layer. Both hole-blocking materials have lower HOMO energies than the host of the phosphorescent light-emitting layer.

Phosphorescent oled having double hole-blocking layers

Tandem white OLEDs with fluorescent and phosphorescent emission have been fabricated. Their electroluminescence performance is dependent on fluorescent blue-emitting portion in a white spectrum. When CIEx = 0.33, CIEy = 0.35, the devices can achieve 22% external quantum efficiency, 50 cd/A, 25 lm/W, and ∼10,000 h lifetime, tested at 6.2 V and 1000 nits. If the blue-emitting portion is reduced to produce color with CIEx = 0.34, CIEy = 0.40, the devices can exhibit ∼23% external quantum efficiency, 57 cd/A, 30 lm/W, and ∼30,000 h lifetime when tested at 5.9 V and 1000 nits.

54.2: Tandem White OLEDs Combining Fluorescent and Phosphorescent Emission

An organic light-emitting device (OLED) including an anode; a cathode; a blue light-emitting layer disposed between the anode and the cathode and includes at least one blue host and at least one fluorescent blue dopant; a first light-emitting layer disposed between the anode and the blue light-emitting layer, including a first phosphorescent dopant and a host; and a second light-emitting layer disposed between the blue light-emitting layer and the cathode, including a second phosphorescent dopant and a host.

Hybrid oled having improved efficiency

This invention relates to an apparatus and method for providing calibration of photographic media. More particularly, the method and apparatus are based on measurements of areas of minimum optical density of a given photographic medium. Such measurements, when combined with reference optical density vs. exposure calibration data for related photographic media, provide an estimate of the optical density vs. exposure relationship of the given photographic medium. The method and apparatus of this invention are especially applicable for the calibration of photographic media used in hybrid imaging applications.

Method and means for calibrating photographic media using measured minimum optical density values

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