15results about How to "High hole mobility" patented technology

The utility model discloses an electro -optical modulator is applied to the field of semiconductor technology, include: substrate, substrate surface is provided with photodiode, photodiode includes the epitaxial layer, P type doped area and N type doped area that connect gradually, the lattice constant of epitaxial layer is greater than the lattice constant of P type doped area, the utility model discloses the epitaxial layer of lattice constant greater than P type doped area is arranged to one end of P type doped area, because of the difference of lattice constant between epitaxial layer and P type doped area, will produce compression stress, can improve hole mobility in P type doped area, reduce resistance, and can increase electro -optical modulator bandwidth.

According to the main body material, the organic electroluminescent material containing the double main bodies and the organic electroluminescent device, the main body material contains a triarylamine structure and dibenzofuran binaphthyl, the physical and thermal stability of a compound of the triarylamine structure is good, crystallization and aggregation among molecules are not prone to occurring, and the service life is effectively prolonged; the HOMO / LUMO energy level of the material can be adjusted by introducing a triarylamine structure, and the energy level of the material is better matched with the energy level of other materials; the total reflection loss and waveguide loss of a traditional OLED device can be effectively reduced, and the luminous efficiency is improved. The dibenzofuran binaphthalene can improve the fluorescence quantum yield, and has good thermal stability and a proper energy level structure; the triazine structure has relatively good stability and relatively strong electron accepting capability, energy required during electron injection is reduced, and the voltage required for working of the device is reduced; when the luminescent material is used for the organic electroluminescent device, the driving voltage of the organic electroluminescent device is reduced, the efficiency of the device can be improved, and the service life of the device can be prolonged.

The invention relates to a boron-nitrogen doped fluoranthene compound as well as a preparation method and application thereof. The structural formula of the boron-nitrogen doped fluoranthene compound is as shown in a formula 1 or a formula 2, and a boron-nitrogen unit is embedded in a molecular central axis; 1, 8-dibromo-boron aza-naphthalene is used as a raw material, and the boron-nitrogen-doped fluoranthene compound and the derivative thereof are synthesized by a one-pot method through a palladium-catalyzed Suzuki-Miyaura coupling reaction. The method is simple and convenient to operate and mild in reaction condition, and has good structural adjustability and applicability; the obtained compound shows excellent photoelectric properties and can be applied to the field of organic photoelectric functional materials.

The application provides a triarylamine compound and an organic electroluminescent device thereof, and relates to the technical field of organic electroluminescent materials.The triarylamine compound has good thermal stability, high hole mobility and a suitable HOMO energy level, and is used as a hole transport material in the organic electroluminescent device, which can effectively reduce the hole transport resistance, improve the injection and transport efficiency of holes in the device, make the efficient recombination of electrons and holes in the light-emitting layer, effectively reduce the driving voltage of the device, improve the light-emitting efficiency of the device, reduce the movement of excitons to the outside of the light-emitting layer, avoid interface light emission, reduce the loss of the device, and prolong the service life of the device.The triarylamine compound can be applied to the fields of display, illumination and organic solar cells.

This application belongs to the field of display technology and relates to a light-emitting device and its fabrication method, as well as a display apparatus. The light-emitting device includes a first electrode, a first charge carrier functional layer, a light-emitting layer, and a second electrode stacked sequentially. The material of the first charge carrier functional layer includes an organic ammonium salt and a doped or undoped first metal oxide. The use of an organic ammonium salt and a doped or undoped first metal oxide in the first charge carrier functional layer of this application can improve the hole mobility of the first charge carrier functional layer, improve the injection balance of holes and electrons in the light-emitting layer, and improve the luminous efficiency and lifespan of the light-emitting device.

The present application relates to an organic compound, and electronic elements and electronic devices using the same. The organic compound has a structure shown in Formula I, and application of the organic compound to an organic electroluminescent device can significantly improve the performance of the device.

The application discloses an aromatic amine organic compound and an organic electroluminescent device containing the same, and belongs to the technical field of semiconductor materials. The structure of the aromatic amine organic compound is shown in general formula (1). The aromatic amine organic compound has excellent hole mobility and exciton blocking capacity under high current density. When the aromatic amine organic compound is used to form a light-emitting auxiliary layer material of an organic electroluminescent device, the device efficiency is improved and the device life is prolonged.

The application discloses a perovskite quantum dot / organic semiconductor single crystal heterojunction transistor and a preparation method thereof. The perovskite quantum dot / organic semiconductor single crystal heterojunction transistor comprises a gate, an insulating layer, a photosensitive layer, an active layer, a source and a drain. The gate, the insulating layer, the photosensitive layer and the active layer are arranged in parallel and connected in a vertical direction from bottom to top. The source and the drain are arranged in parallel and connected to the upper surface of the active layer. The photosensitive layer is a Cs2AgBiBr6 quantum dot film, and the active layer is a pentacene single crystal. The preparation method of the perovskite quantum dot / organic semiconductor single crystal heterojunction transistor comprises the following steps: covering the Cs2AgBiBr6 quantum dot film on the insulating layer as the photosensitive layer; transferring the pentacene single crystal to the upper surface of the photosensitive layer as the active layer; and arranging the source and the drain on the active layer. The perovskite quantum dot / organic semiconductor single crystal heterojunction transistor obtained by the application shows strong field effect, high on / off ratio and high hole mobility.

This invention discloses an organic electroluminescent device and display device. The organic electroluminescent device includes an anode, a cathode, and at least one light-emitting layer formed between the anode and the cathode. A hole injection layer and a hole transport region are provided between the anode and the light-emitting layer closest to the anode. The hole transport region includes a first hole transport layer and a second hole transport layer with different refractive indices. The first hole transport layer is selected from compounds of Formula 1 or Formula 3, and the second hole transport layer is selected from compounds of Formula 2. This invention's organic electroluminescent device, through improvements in film structure and material matching, ensures both material stability and carrier transport, while simultaneously improving the light field distribution through optimized optical microcavity structure, thus achieving performance enhancement. [Formula 1] [Formula 2] [Formula 3]

The application belongs to the technical field of organic synthesis, and discloses a non-fused ring thiophene polynuclear hole transport material and a preparation method and application thereof. The hole transport material takes a non-fused ring thiophene polynucleus as a central core and methoxytriphenylamine as a peripheral end group. The S and O atoms of the non-fused ring thiophene polynucleus are conducive to forming a non-covalent conformational lock, so as to make the material have excellent solubility and film-forming property, and effectively enhance molecular accumulation and improve hole transport performance. In addition, the central core polynuclear sulfur atom characteristics promote the interface action of the hole transport layer and the perovskite layer, are conducive to passivating the interface defects of the perovskite layer, and further improve the transport and separation efficiency of carriers. The non-fused ring thiophene polynuclear hole transport material is applied to a perovskite solar cell, the device open-circuit voltage is 1.130 V, the short-circuit photocurrent density is 24.07 mA cm ‑2 , the fill factor is 0.7860, and finally a high photoelectric conversion efficiency of 21.38% is obtained, which shows great commercial application value.

The invention relates to an organic compound, an organic electroluminescent device and an electronic device. The organic compound provided by the invention has a structure as shown in formula I. When the organic compound is applied to an organic electroluminescent device, the performance of the device can be remarkably improved.

The application provides an organic compound with benzene as a core and a preparation method and application thereof, and an organic electroluminescent device, and belongs to the technical field of semiconductors. The organic compound provided by the application has benzene as a core and is connected with an electron-donating group, has high hole mobility, and has high hole transport rate, which can effectively reduce the starting voltage of the device and improve the efficiency of the organic electroluminescent device. The triamine structure in the compound can reduce the crystallinity of the molecule, reduce the planarity of the molecule, prevent the molecule from moving on the plane, and thus improve the thermal stability of the molecule. Meanwhile, the structure of the compound provided by the application makes the distribution of electrons and holes in the light-emitting layer more balanced, improves the hole injection and transport performance under the appropriate HOMO energy level, and can improve the current efficiency and service life of the device.

The invention relates to the technical field of perovskite solar cells, in particular to a crown ether hole transport material, a preparation method thereof and a perovskite solar cell. According to the material, a crown ether ring is used as a core functional group, and a conjugate conductive unit and a self-assembly anchoring group are connected to form an anchoring group-conjugate skeleton-crown ether ring structure. According to the preparation method, the crown ether hole transport material is synthesized step by step through two steps of Suzuki coupling, nucleophilic substitution, Arbuzov reaction and hydrolysis reaction. The material can be accurately matched with perovskite cations, passivate surface defects and improve hole mobility and interface stability, the photoelectric conversion efficiency of a small-area device breaks through 25.5%, film forming is uniform, synthesis is easy and convenient, cost is low, large-area preparation is adapted, and the problems that an existing material is low in efficiency and poor in stability can be remarkably solved.

This application discloses a hole transport thin film, an optoelectronic device, a preparation method, and a display device. The hole transport thin film is made of block copolymers and crosslinked compounds. The block copolymers include fluorene-containing groups, aniline-containing groups, and groups containing first crosslinking groups. The crosslinked compound includes a main chain and at least two second crosslinking groups connected to the main chain. All or part of the hydrogen atoms in the crosslinked compound are replaced by fluorine atoms, and the second crosslinking groups undergo a crosslinking reaction with the first crosslinking groups. The hole transport thin film of this application has a predominantly non-crosslinked structure near the hole injection layer and a predominantly crosslinked structure near the light-emitting layer. This reduces interfacial miscibility between the hole transport thin film and the light-emitting layer, thereby improving the current efficiency of the optoelectronic device.

This application discloses a compound, an electroluminescent device, a method for preparing the same, and a display device. The compound comprises Ar, a coumarin group, and a linking group B for connecting Ar and the coumarin group. Ar is selected from structural units containing aryl and / or heteroaryl groups. The method for preparing the electroluminescent device includes the step of preparing a hole transport layer. In the process of preparing the hole transport layer, a hole transport material layer is first prepared, the material of which includes the compound. Then, the hole transport material layer is treated with a first illumination condition to form a cross-linked structure. Next, an upper functional film is prepared on one side of the hole transport material layer. After the upper functional film is prepared, the hole transport material layer is treated with a second illumination condition to de-crosslink the cross-linked hole transport material.