BEIJING SUMMER SPROUT TECHNOLOGY CO., LTD.

Provided is an electroluminescent device. The organic electroluminescent device comprises an anode, a cathode and an organic layer disposed between the anode and the cathode, where the organic layer comprises a first compound having a structure of H-L 1 -E and a second compound having a general formula of M(L a ) m (L b ) n (L c ) q , and the device has at least one maximum emission wavelength greater than 630 nm. Such a new material composition consisting of the first compound and the second compound can be used in a light-emitting layer of the electroluminescent device. The new material composition can achieve the emission of deep red light in the device, significantly reduce a drive voltage of the device while significantly improving device efficiency and/or a device lifetime, and provide better device performance. Further provided is a display assembly.

Provided are a flexible OLED light-emitting module and a preparation therefor. The flexible OLED light-emitting module includes: a flexible substrate having a plurality of holes A, an OLED having a plurality of holes B, an encapsulation layer having a plurality of holes C, and an external circuit, where the holes A, B and C coincide to form through-holes penetrating the light-emitting module, and the OLED device has a common organic light-emitting layer. The new flexible OLED light-emitting module has good air permeability due to through-holes and thus can be used in various phototherapy devices so that the phototherapy devices not only have a large light-emitting area, but also have good air permeability and are suitable for long-term wearing. Further provided are a method for preparing the flexible OLED light-emitting module and a phototherapy device including the flexible OLED light-emitting module.

Provided are an organic electroluminescent material and device thereof. The organic electroluminescent material is a polycyclic compound having a structure of Formula 1, and the compound can be used as a thermally activated delayed fluorescence (TADF) material in an organic electroluminescent device. The polycyclic compound has a regulatory effect on the luminescent color, can achieve the desired green light emission, and has deeper highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels, thereby possessing the potential to become an excellent luminescent material and demonstrating very broad industrial application prospects. Further provided are an organic electroluminescent device comprising the compound and a compound composition comprising the compound.

Provided are an organic electroluminescent material and a device including the same. The organic electroluminescent material is a polycyclic compound having a structure of Formula 1, and the compound can be used as a TADF material in an organic electroluminescent device. The polycyclic compound has a regulating effect on the luminescent color, can achieve the desired green light emission, and enables the device to exhibit a narrow full width at half maximum and higher efficiency and demonstrating very broad industrial application prospects. Further provided are an organic electroluminescent device including the compound and a compound composition including the compound.

Provided is an active-matrix organic electroluminescent display which comprises a stacked organic electroluminescent device. The stacked organic electroluminescent device comprises at least two light-emitting units. At least one common p-type charge generation layer is comprised between two adjacent light-emitting units. The common p-type charge generation layer comprises a first organic material and a second organic material that satisfy a particular energy level relationship. The common p-type charge generation layer has a particular high doping proportion and a particular low lateral conductivity per unit doping. Since the common p-CGL in the active-matrix OLED display of the present disclosure comprises a first organic material and a second organic material that satisfy a particular energy level relationship and has a particular low lateral conductivity per unit doping, the device can obtain excellent device performance while the crosstalk between the pixels is inhibited.

Provided are an organic electroluminescent material and a device comprising the same. The organic electroluminescent material is a compound having a structure of Formula 1, and the compound can be used in an organic electroluminescent device, for example, as an electron blocking material. The application of these compounds in organic electroluminescent devices can reduce the device voltage, increase the device efficiency, and especially greatly improve the device lifetime, thereby providing better device comprehensive performance. Further provided are an organic electroluminescent device comprising the compound and a compound composition comprising the compound.

Provided is a light-emitting material with polycyclic ligand. The light-emitting material is a metal complex with polycyclic ligand and may be used as a light-emitting material in an electroluminescent device. While maintaining a very narrow FWHM, these novel metal complexes can better adjust the light-emitting color of the device, reduce the driving voltage of the device or maintain the driving voltage at a low level, improve device efficiency, greatly increase the lifetime of the device, and provide better device performance. Further provided are an electroluminescent device and a compound composition.

Provided is an organic electroluminescent device. The organic electroluminescent device has an organic layer comprising at least a fluorescent material and a metal complex. The fluorescent material has a structure represented by Formula 1, and the metal complex comprises a ligand with a structure represented by Formula 2. The organic electroluminescent device uses a phosphorescent material to sensitize the fluorescent material so that the prepared organic electroluminescent device has a narrower full width at half maximum and higher efficiency. Further provided is a display apparatus comprising the organic electroluminescent device.

Provided is a luminescent material having a polycyclic ligand. The luminescent material is a new metal complex having a polycyclic ligand and may be used as luminescent materials in electroluminescent devices. These new metal complexes achieve red light emission, have a very narrow full width at half maximum, and can achieve high saturation luminescence. In addition, these new metal complexes, when used as luminescent materials in electroluminescent devices, can achieve red light emission, have a very narrow full width at half maximum, achieve high saturation luminescence, reduce or maintain a low voltage, greatly improve device efficiency and lifetime, and provide better device performance. Further provided are an electroluminescent device and a compound composition.

Provided are a mixture, a composition, an electroluminescent device and an electronic device thereof. The mixture comprises three or more compounds, one of which has a structure of Formula 1. The mixture of the present disclosure has high evaporation stability and can be used as a single evaporation source in a preparation process of an OLED device, which can simplify a production process and reduce a production cost. Moreover, when the mixture is used as a host material in an organic electroluminescent device, the electroluminescent device can obtain good overall performance. Further provided are an organic electroluminescent device comprising the mixture, an electronic device and a compound composition.