Abstract: Organic luminescent material, includes: host material, TADF sensitizer, and fluorescent-luminescent material; wherein absolute value of difference between LUMO level of the host material and LUMO level of the TADF sensitizer is not more than 0.4 eV, and absolute-value of difference between HOMO level of the host material and HOMO level of the TADF sensitizer is not more than 0.4 eV; absolute-value of LUMO level of the fluorescent-luminescent material is not more than absolute-value of the LUMO level of the host material and the LUMO level of the TADF sensitizer, and/or absolute-value of HOMO level of the fluorescent-luminescent material is not less than an absolute-value of the HOMO level of the host material and absolute-value of the HOMO level of the TADF sensitizer; and emission-spectrum of the host material overlaps an absorption-spectrum of the TADF sensitizer, and emission-spectrum of the TADF sensitizer overlaps absorption-spectrum of the fluorescent-luminescent material.

Abstract: Provided is a light-emitting diode. The light-emitting diode includes: an anode; a hole transport layer, disposed on a side of the anode and containing a hole transport material, wherein the hole transport material includes an organic small molecule material with a molecular weight less than 4000, and a hole mobility of the hole transport material is not less than 1×E?5 cm2/(VS); a light-emitting layer, disposed on a side, distal from the anode, of the hole transport layer, and containing a quantum dot material; an electron buffer layer, disposed on a side, distal from the hole transport layer, of the light-emitting layer, and containing a thermally activated delayed fluorescent material; and a cathode, disposed on a side, distal from the light-emitting layer, of the electron buffer layer.

Abstract: The embodiments of the disclosure provide an organic electroluminescent device, including an anode, a cathode, an emitting layer arranged between the anode and the cathode, and an assistant luminescent layer located on one side, facing the anode, of the emitting layer. The assistant luminescent layer includes a first host material and a first fluorescent guest material. The emitting layer includes a second host material, a TADF material, and a second fluorescent guest material. The first host material and the first fluorescent guest material satisfy: S1(B)?T1(B)>0.2 eV; S1(B)>S1(C); T1(B)>T1(C); ?HOMO(B)?LUMO(C)|?S1(C)|?0.2 eV. The lowest singlet state energy of the first host material is S1(B), and the lowest triplet state energy is T1(B). The lowest singlet state energy of the first fluorescent guest material is S1(C), and the lowest triplet state energy is T1(C).

Abstract: Provided in the present disclosure are a thermally activated delayed fluorescent material, an organic light-emitting device and a display apparatus. The energy level difference between a singlet energy level and a triplet energy level of the thermally activated delayed fluorescent material is less than 0.3 eV, and a spin-orbit coupling value SOC between a singlet state and a triplet state of the thermally activated delayed fluorescent material is SOC?0.05 cm?1.

Abstract: The present disclosure provides a light-emitting device, a manufacturing method thereof, and a display device. The light-emitting device includes an anode, a cathode, a light-emitting layer between the anode and the cathode, and a hole transport layer between the anode and the light-emitting layer. The hole transport layer includes a first compound and a second compound, and an absolute value of an energy level of the highest occupied molecular orbital of the second compound is greater than or equal to 5 eV and less than or equal to 6.5 eV.

Abstract: A hyperbranched polymer includes a hyperbranched, hydrophobic molecular core, respective low molecular weight polyethyleneimine chains attached to at least three branches of the hyperbranched, hydrophobic molecular core, and respective polyethylene glycol chains attached to at least two other branches of the hyperbranched, hydrophobic molecular core. Examples of the hyperbranched polymer may be used to form hyperbranched polyplexes, and may be included in DNA or RNA delivery systems.

Abstract: The embodiments of the present disclosure provide a light-emitting device and a display substrate, which belong to the technical field of organic light-emitting diodes. The light-emitting device of the present disclosure comprises: a first light-emitting layer comprising a first host material and a first guest material; and a second light-emitting layer comprising a second host material and a second guest material; S1(h1)>S1(g1), T1(h1)>T1(g1), S1(g1)?T1(g1)?0.1 eV; S1(h2)>S1(g2), T1(h2)>T1(g2), S1(g2)?T1(g2)?0.1 eV; S1(h1)?S1(h2)>S1(g1)>S1(g2), T1(h1)?T1(h2)>T1(g1)>T1(g2); the second guest material is a TADF material; at least 40% of the area in a region covered under the emission spectrum of the first light-emitting layer overlaps with the region covered under the absorption spectrum of the second light-emitting layer.

Abstract: A hyperbranched polymer includes a hyperbranched, hydrophobic molecular core, respective low molecular weight polyethyleneimine chains attached to at least three branches of the hyperbranched, hydrophobic molecular core, and respective polyethylene glycol chains attached to at least two other branches of the hyperbranched, hydrophobic molecular core. Examples of the hyperbranched polymer may be used to form hyperbranched polyplexes, and may be included in DNA or RNA delivery systems.

Abstract: The present invention provides an organic electroluminescent device, a display panel, and a display device. An organic electroluminescent device, including: an anode and a cathode, arranged in opposite; a light-emitting layer, between the anode and the cathode; a first auxiliary function layer, between the light-emitting layer and the anode; and a second auxiliary function layer, between the light-emitting layer and the cathode; where the light-emitting layer comprises a first compound, a second compound and a third compound; a Stokes shift between an absorption spectrum of the second compound and an emission spectrum of the second compound is smaller than 70 nm; and a doping mass ratio of the second compound in the light-emitting layer is smaller than 50 wt %.

Abstract: A display substrate includes a backplane, a pixel defining layer, a gas absorption layer, and light-emitting layers. The pixel defining layer is disposed on a side of the backplane, and has a plurality of openings. The gas absorption layer is disposed on a side of the pixel defining layer away from the backplane, and is configured to absorb a gas generated by the pixel definition layer due to an action of ultraviolet rays. The gas absorption layer exposes at least part of regions of the plurality of openings. The light-emitting layers are each at least partially located in an opening in the plurality of openings.

Abstract: An organic light-emitting device and a preparation method therefor, a display panel, and a display device. The organic light-emitting device comprises an anode layer, a cathode layer, and a first light-emitting layer and an auxiliary light-emitting layer disposed between the anode layer and the cathode layer; the auxiliary light-emitting layer is located between the first light-emitting layer and the cathode layer; the first light-emitting layer comprises a first host material, a first thermally activated delayed fluorescence material, and a first fluorescence guest material; the auxiliary light-emitting layer comprises at least a second host material and a second thermally activated delayed fluorescence material. The first light-emitting layer is a super-fluorescence system, and the auxiliary light-emitting layer also forms a super-fluorescence system together with the first fluorescence guest material.

Abstract: An OLED display panel, a preparation method therefor, and a display apparatus. The display panel includes a display area including a first sub-pixel, a second sub-pixel and a third sub-pixel displaying different colors; the display area includes a first electrode layer, a pixel defining layer, an organic functional layer and a second electrode layer sequentially arranged on a substrate; the organic functional layer includes a first light-emitting layer in the first sub-pixel, a second light-emitting layer in the second sub-pixel, and a third light-emitting layer covering the display area and having an integrated structure; the orthographic projection, on the substrate, of each of the first light-emitting layer and the second light-emitting layer includes the orthographic projection of an opening on the substrate, which defines a corresponding sub-pixel, of the pixel defining layer and does not overlap with orthographic projections of remaining openings of the pixel defining layer on the substrate.

Abstract: A fixing device and an installation tool and a fixing method of the cranial flap, wherein the installation tool comprises a driving part, a loading part and an over torque protection mechanism disposed between the driving part and the loading part, the driving part drives the loading part to rotate by the over torque protection mechanism, the loading part is used for tightening the cranial flap fixation device, when the torque of the driving part acting on the over torque protection mechanism is larger than the threshold value, the over torque protection mechanism will be separated from the driving part and/or the loading part. The present invention not only effectively improves the installation and disassembly efficiency of the installation tool, but also eliminates hidden safety hazards caused by uncertainties caused by human factors in the tightening process, significantly improves the safety of the installation process.

Abstract: An electroluminescent display panel, a method for manufacturing the same, and a display device are disclosed, wherein the electroluminescent display panel comprises a bending region and a non-bending region, a plurality of first pixels arranged in an array are provided in the non-bending region, a plurality of second pixels arranged in an array are provided in the bending region, and an open area of the second pixels is smaller than that of the first pixels; in the bending region, at least one elastic region with an extending direction consistent with a bending axis direction is provided at a gap of the second pixels along a direction perpendicular to the bending axis direction, a groove is provided in an insulating composite film layer in each of the elastic region, and the insulating composite film layer comprises a planarization layer and a pixel definition layer positioned over the planarization layer; an elastic member is filled in the groove, which has an elastic modulus greater than that of the planari

Abstract: Provided is a display substrate including a base substrate, an anode layer, a light-emitting layer, an electron diffusion layer, a hole block layer and a cathode layer which are sequentially stacked along a direction away from the base substrate, wherein a material of the electron diffusion layer comprises a first luminescent material, and a transport speed of holes generated by the anode layer in the electron diffusion layer is less than a transport speed of the holes in the light-emitting layer.

Abstract: A light-emitting device includes a first light-emitting layer and a second light-emitting layer that are stacked. A material of the first light-emitting layer includes a first host material and a first TADF sensitizer. A material of the second light-emitting layer includes a second host material, a second TADF sensitizer, and a second fluorescent emissive material. Transmission rates of the material of the first light-emitting layer and the material of the second light-emitting layer to holes are greater than transmission rates of the material of the first light-emitting layer and the material of the second light-emitting layer to electrons, and there is a first overlapping region between a normalized electroluminescence spectrum of the first TADF sensitizer and a normalized absorption spectrum of the second fluorescent emissive material.

Abstract: The present disclosure relates to an organic light emitting device, a display device, a preparation method, a storage medium and a computer equipment. The organic light emitting device includes an anode, an organic layer and a cathode, in which the organic layer includes a hole injection layer, a hole transport layer, an electron blocking layer, an organic light emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer, which are sequentially arranged in a stack on the anode, in which the hole injection layer includes a first host material and a first doping material doped in the first host material, a doping concentration of the first doping material gradually decreases in a direction away from the anode, and a doping ratio of the first doping material in the hole injection layer is less than or equal to 6%.

Abstract: An OLED display substrate includes a base substrate with a display region arranged thereon. First, second and third sub-pixels are arranged in the display region. A first electrode layer, a pixel defining layer, a second electrode layer, and organic functional layers are arranged in the display region. The organic functional layers include first, second and third light-emitting layers. The first light-emitting layer covers the display region and is an integral structure. The second and third light-emitting layers are arranged on a side of the first light-emitting layer towards the second electrode layer. An orthographic projection of each sub light-emitting layer of the second and third light-emitting layers on the base substrate completely covers an orthographic projection of an opening of the pixel defining layer on the base substrate, and does not overlap with orthographic projections of other openings of the pixel defining layer on the base substrate.

Abstract: A display panel includes: a flexible substrate, and the flexible substrate includes an intermediate region and a preset bending region located at at least one side of a periphery of the intermediate region; a display layer located at a side of the flexible substrate; and a transparent cover film layer located at a side of the display layer away from the flexible substrate, and the transparent cover film layer includes a first portion located at a side of the display layer away from the intermediate region, and a second portion located at a side of the display layer away from the preset bending region. The first portion is connected to the second portion, and the thickness of at least partial region of the second portion progressively decreases in a direction away from the first portion.

Abstract: A display panel and a manufacturing method thereof are disclosed. The display panel includes: a base substrate; a first sub-pixel disposed on the base substrate and including a first light-emitting device configured to emit visible light for display operation; a second a light-emitting device overlapped with the first light-emitting device in a direction perpendicular to the base substrate and configured to emit infrared light; and a first photosensitive device disposed on the base substrate and configured to sense light obtained after the infrared light is reflected.