Abstract: An organic electroluminescent device and a display apparatus. The organic electroluminescent device includes a light-emitting layer, including a triplet-triplet annihilation type host and a fluorescent dye, where the fluorescent dye has a structure represented by the following Formula (1) or Formula (2). When the fluorescent dye in the light-emitting layer of the organic electroluminescent device combines with the triplet-triplet annihilation type host, the voltage of the device can be reduced, and the luminescence efficiency of the device can be improved.

Abstract: An organic electroluminescent device and a display device. The organic electroluminescent device includes a first functional layer, a light-emitting layer, and a second functional layer that are sequentially stacked. The light-emitting layer includes a host material, a sensitizer, and a dye; the light-emitting layer includes N sections in a stacking direction, with a first section being in contact with the first functional layer and a Nth section being in contact with the second functional layer, N>1; where among the N sections, a section with the highest dye content is the highest critical section, where D1<Dmax and D1?Dother, and/or DN<Dmax and DN?Dother. The special composition of the light-emitting layer of the organic electroluminescent device can effectively reduce a probability that carriers are captured by the dye, thereby making the organic electroluminescent device have high luminescence efficiency by suppressing exciton quenching.

Abstract: An organic electroluminescent device and a display apparatus, where the organic electroluminescent device includes an anode functional layer, a first electron blocking layer, a second electron blocking layer, a light-emitting layer and a cathode functional layer; the first electron blocking layer includes a red light electron blocking layer and a green light electron blocking layer, which are disposed side by side, and the second electron blocking layer is a blue light electron blocking layer; a HOMO energy level of a red light electron blocking material in the red light electron blocking layer and a HOMO energy level of a green light electron blocking material in the green light electron blocking layer are both lower than a HOMO energy level of a blue light electron blocking material in the blue light electron blocking layer.

Abstract: The present disclosure relates to a display panel (10) and a method of manufacturing the same. The display panel (10) includes a substrate (101), a number of light transmissive units (320), and an package layer (600). The substrate (101) has a light transmissive region (700) and a pixel display region (800). The light transmissive region (700) and the pixel display region (800) are complementarily disposed with respect to the substrate (101). The plurality of light transmissive units (320) are disposed in the light transmissive region (700) and overlay a surface of the substrate (101) within the light transmissive region (700). The package layer (600) overlays a surface of a number of light transmissive units (320). In the present disclosure, the substrate (101) has a different structure in the light transmissive region (700) and the pixel display region (800).

Abstract: An organic electroluminescent device and a display apparatus. The organic electroluminescent device includes a first electrode, a second electrode and an organic layer disposed between the first electrode and the second electrode, where the organic layer includes an emission layer (EML), the EML includes a host material, a thermally activated delayed fluorescence (TADF) sensitizer and a fluorescent dye, and the fluorescent dye is selected from a compound represented by Formula (1).

Abstract: An organic electroluminescent device and a display apparatus. The organic electroluminescent device includes a first electrode, a second electrode and at least two organic electroluminescent units located between the first electrode and the second electrode. The at least two organic electroluminescent units are arranged in a stacked manner. The at least two organic electroluminescent units include a first organic electroluminescent unit. The first organic electroluminescent unit includes a first light-emitting layer. The first light-emitting layer contains a first host material, a thermally activated delayed fluorescence sensitizer and a first fluorescent dye.

Abstract: An organic electroluminescent device and a display apparatus. The organic electroluminescent device includes a first electrode, a second electrode and an organic layer located between the first electrode and the second electrode. The organic layer includes a light-emitting layer. The light-emitting layer contains a host material, a thermally activated delayed fluorescence sensitizer and a fluorescent dye. The energy level relationship between the host material and the thermally activated delayed fluorescence sensitizer is LUMOhost?LUMOsensitizer, while HOMOsensitizer?HOMOhost.

Abstract: Disclosed are an organic light emitting diode, a display panel and a display device. The organic light emitting diode includes a first electrode, a second electrode, a light emitting layer and an electron blocking layer, the first electrode and the second electrode are disposed opposite to each other, the light emitting layer is disposed between the first electrode and the second electrode, the electron blocking layer is disposed between the light emitting layer and the first electrode. A LUMO level of the electron blocking layer is higher than a LUMO level of a light emitting host material in the light emitting layer, a first level difference between the LUMO level of the electron blocking layer and the LUMO level of the light emitting host material in the light emitting layer is represented by A, where A?0.4 eV.

Abstract: Provided are an OLED, display panel and display device. The OLED includes a first electrode, a second electrode, a light emitting layer and at least one blocking layer. The second electrode is arranged opposite to the first electrode. The light emitting layer is arranged between the first electrode and the second electrode. The blocking layer is arranged between the light emitting layer and the second electrode and/or between the light emitting layer and the first electrode. Each blocking layer of the at least one blocking layer comprises at least two blocking materials, electron mobility of at least one blocking material of the at least two blocking materials is lower than a first preset value, electron mobility of at least another blocking material of the at least two blocking materials is higher than a second preset value, and the first preset value is lower than the second preset value.

Abstract: Provided is an organic light-emitting diode. The organic light-emitting diode includes a first electrode, a second electrode, a light-emitting layer and a hole blocking layer, where the first electrode and the second electrode are oppositely disposed; the light-emitting layer is disposed between the first electrode and the second electrode; the hole blocking layer is disposed between the light-emitting layer and the second electrode; and the hole blocking layer includes at least two hole blocking sub-layers which are stacked, where a lowest unoccupied molecular orbital (LUMO) energy level decreases sequentially in the at least two hole blocking sub-layers.

Abstract: A composition, an OLED device and an OLED display panel. The composition includes a low-mobility metal complex material of bias-electron-transport-type in a mass percentage of 1% to 99% and an organic electron transport material in a mass percentage of 1% to 99%, wherein an electron mobility of the low-mobility metal complex material of bias-electron-transport-type is less than 1*E?7 cm2/Vs. The influence of the electric field and the temperature on the electron mobility in the electron transport layer can be reduced, the balance of a carrier system in a high temperature environment is better, and the service life in the high temperature environment is long.

Abstract: Provided are an organic light-emitting device and a display panel. The organic light-emitting device includes a first electrode, a second electrode, an electron injection layer and a light-emitting material layer which are disposed between the first electrode and the second electrode. A material of the electron injection layer includes ytterbium and further includes at least one of lithium fluoride, 8-hydroxyquinolinolato-lithium, lithium nitride, cesium fluoride, or cesium carbonate.

Abstract: An organic light emitting device and a display apparatus, where the organic light emitting device includes a light-emitting layer, the light-emitting layer includes a host material and a dye, the host material is a triplet-triplet annihilation material, and the dye is the boron-nitrogen material shown in Formula 1. The organic light emitting device has excellent light-emitting efficiency and color purity.

Abstract: A display panel and a display device. The display panel includes a substrate, at least three different light-emitting units disposed on the substrate, and at least three different buffer encapsulation layers disposed on the side of the at least three different light-emitting units facing away from the substrate. The at least three different light-emitting units emit at least three different colors. The thickness of at least one buffer encapsulation layer corresponding to at least one light-emitting unit among the at least three different light-emitting units is different from the respective thicknesses of the other buffer encapsulation layers corresponding to the other light-emitting units among the at least three different light-emitting units.

Abstract: Disclosed is an organic light-emitting diode device including: an electron transport layer, a hole blocking layer and a light emitting layer arranged in a stacked manner; the hole blocking layer includes a first material, and the electron transport layer includes the first material.

Abstract: An organic electroluminescent device and an organic electroluminescent apparatus are disclosed. The organic electroluminescent device includes a first electrode layer, a first carrier functional layer, a light-emitting layer and a second electrode layer stacked in sequence, wherein a P-doped layer is arranged between the first carrier functional layer and the light-emitting layer. Thus the energy level bending of an interface between the first carrier functional layer and the light-emitting layer is modified, and the hole injection potential barrier at the interface between the two is reduced, thereby effectively reducing the turn-on voltage of the organic electroluminescent device.

Abstract: The present disclosure relates to a display panel (10) and a method of manufacturing the same. The display panel (10) includes a substrate (101), a number of light transmissive units (320), and an package layer (600). The substrate (101) has a light transmissive region (700) and a pixel display region (800). The light transmissive region (700) and the pixel display region (800) are complementarily disposed with respect to the substrate (101). The plurality of light transmissive units (320) are disposed in the light transmissive region (700) and overlay a surface of the substrate (101) within the light transmissive region (700). The package layer (600) overlays a surface of a number of light transmissive units (320). In the present disclosure, the substrate (101) has a different structure in the light transmissive region (700) and the pixel display region (800).

Abstract: The present application discloses an organic electroluminescent device that includes a plurality of kinds of light-emitting units having different light-emitting wavelengths, wherein the light-emitting units are organic light-emitting diodes, the organic light-emitting diodes include a plurality of single-colored organic light-emitting diodes and/or a plurality of white-light organic light-emitting diodes provided with optical filters; at least one kind of the organic light-emitting diodes has a microcavity structure; a microcavity optical length Li of the organic light-emitting diode having the microcavity structure and a light-emitting wavelength ?i of the corresponding light-emitting unit meet the following formula: Li=ni?i, wherein ni?2, ni is a positive integer, and the ni corresponding to at least one of the plurality of kinds of light-emitting units having different light-emitting wavelengths ?i is larger than or equal to 3; m is the number of the kinds of the light-emitting units, m?i?1, i and m are p

Abstract: Provided are an OLED, display panel and display device. The OLED includes a first electrode, a second electrode, a light emitting layer and at least one blocking layer. The second electrode is arranged opposite to the first electrode. The light emitting layer is arranged between the first electrode and the second electrode. The blocking layer is arranged between the light emitting layer and the second electrode and/or between the light emitting layer and the first electrode. Each blocking layer of the at least one blocking layer comprises at least two blocking materials, electron mobility of at least one blocking material of the at least two blocking materials is lower than a first preset value, electron mobility of at least another blocking material of the at least two blocking materials is higher than a second preset value, and the first preset value is lower than the second preset value.

Abstract: The present invention discloses a transparent OLED device, which comprises a plurality of pixels, each pixel comprising an organic functional layer, a first transparent electrode and a second transparent electrode being disposed on both sides of the organic functional layer, a reflective electrode being disposed on one side of the organic functional layer, the area of the reflective electrode being less than that of the organic functional layer. With regard to the transparent OLED device, by providing a reflective electrode, a combination of a light-emitting device over a microdomain is combined with a transparent light-emitting device, such that the luminance on both sides of a transparent OLED device can be respectively adjusted to be the same or different as required. The present invention can be applied to the field of transparent illumination or display.