38results about How to "Improve hole transport efficiency" patented technology

The purpose of the present invention is to provide an organic EL element which (1) has high luminous efficiency and high power efficiency, (2) has a low light emission start voltage, (3) has a low practical driving voltage, and (4) particularly has a long service life. According to the present invention, an organic electroluminescent (EL) element is provided, which is provided with at least a positive electrode, a hole injection layer, a first hole transport layer, a second hole transport layer, a light-emitting layer, an electron transport layer and a negative electrode in this order and is characterized in that the second hole transport layer contains an arylamine compound represented by general formula (1) and the electron transport layer contains a pyrimidine derivative represented bygeneral formula (2). In general formula (2), A represents a monovalent group represented by structural formula (3).

[Problem] The purpose of the present invention is to provide an organic EL element in which various materials for an organic EL element, which excel in hole injection / transport performance, electron injection / transport performance, electron blocking performance, stability in a thin film state, and durability, are combined so that properties of each of the materials can be effectively demonstrated,thereby achieving (1) high luminous efficiency and power efficiency, (2) low luminescence starting voltage, (3) low practical driving voltage, and (4) particularly long service life. [Solution] An organic EL element having at least a positive electrode, a hole transportation layer, a light emission layer, an electron transportation layer, and a negative electrode in the stated order, wherein theorganic EL element is characterized in that the hole transportation layer includes an arylamine compound represented by general formula (1), and the electron transportation layer includes a compound having a benzoazole ring structure represented by general formula (2). (1) (In the formula, Ar1-Ar5 may be identical to each other or different from each other, and represent a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted fused polycyclic aromatic group. Ar6-Ar8 may be identical to each other or different from each other, and represent a hydrogen atom, a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, or a substituted or unsubstituted fused polycyclic aromatic group. n1 represents 0, 1, or 2. Ar3 and Ar4 may form a ring with a single bond or may form a ring so as to be bonded via a substituted or unsubstituted methylene group, an oxygen atom, or a sulfur atom. Ar3 or Ar4 may form a ring with a single bond with a benzene ring to which an Ar3Ar4-N group is bonded, and may form a ring so as to be bonded to each othervia a substituted or unsubstituted methylene group, an oxygen atom, or a sulfur atom.) (2) (In the formula, Ar9 and Ar10 may be identical to each other or different from each other, and represent a hydrogen atom, a deuterium atom, a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted fused polycyclic aromatic group, or a substituted or unsubstituted alkyl group. Y1 represents a substituted or unsubstituted aromatic hydrocarbon group, a substituted or unsubstituted aromatic heterocyclic group, a substituted or unsubstituted fused polycyclic aromatic group, or a substituted or unsubstituted alkyl group. X represents an oxygen atom or a sulfur atom. Z1 and Z2 may be identical to each other or different from each other, and represent a carbon atom or a nitrogen atom).

The present invention provides an organic EL element having, in the indicated sequence, at least an anode, a hole injection layer, a hole transport layer, a light-emitting layer, an electron transportlayer, and a cathode, the organic EL element being characterized in that the hole injection layer contains an arylamine compound represented by general formula (1) and an electron acceptor. The organic EL element according to the present invention provides a higher light emission efficiency and a better durability than heretofore while retaining the same low drive voltage as heretofore.

The invention is a perovskite solar cell based on a PVA modified hole transport layer, comprising a lower transparent electrode layer and an upper electrode layer, five functional layers are sandwiched between the lower transparent electrode layer and the upper electrode layer, and the five functional layers From bottom to top are hole transport layer, PVA interface modification layer, perovskite active layer, electron transport layer and buffer layer, the hole transport layer, PVA interface modification layer, perovskite active layer, electron transport layer All films were prepared by low-temperature solution method. The invention adopts a low-temperature solution method to prepare thin films, reasonably controls the process conditions, and adds a PVA modification layer between the PEDOT:PSS layer and the perovskite layer, which effectively improves the surface wettability of the perovskite, improves the hole transport efficiency, and produces a continuous The uniform perovskite thin film improves the quality of the perovskite absorbing layer, and the obtained perovskite solar cell has high photoelectric conversion efficiency and good stability.

The invention discloses a nano material, a preparation method and a quantum dot light-emitting diode. The nano material includes: MoO 3 Nanoparticles and MoS 2 nanosheets, the MoS 2 nanosheets incorporated in the MoO 3 nanoparticle surface. MoS 2 Nanosheets and MoO 3 The synergistic effect of nanoparticles can improve the hole transport efficiency, thereby improving the luminous efficiency and performance of quantum dot light-emitting diodes.

The invention belongs to the technical field of photoelectric material application technology, and specifically relates to triarylamine derivatives and their preparation methods and applications. The triarylamine derivatives provided by the present invention use triarylamine and fluorenocarbazole as basic structural units, and obtain an asymmetric structure after modification, forming a class of compounds rich in holes and having a high glass transition temperature. When it is used as a hole transport material, it is compatible with hole transport materials commonly used in the prior art such as N,N'-diphenyl-N,N'-bis(3-methylphenyl)-1,1' Compared with ‑biphenyl‑4,4'‑diamine (TPD), the hole transport ability is significantly improved. In organic electroluminescent devices, this series of compounds has higher starting voltage and glass The transition temperature has been significantly improved, and it is an ideal hole transport material. In addition, when the series of compounds are used as light-extracting layer materials, the efficiency of organic electroluminescent devices is greatly improved, and they are ideal light-extracting layer materials.

The invention is a perovskite solar cell based on a cellulose-modified hole-transporting layer. There are five functional layers sandwiched between the lower transparent electrode and the upper electrode layer. It is characterized in that: the five functional layers are from bottom to The hole transport layer, the cellulose interface modification layer, the perovskite active layer and the electron transport layer, and the buffer layer are in sequence, and the hole transport layer, the cellulose interface modification layer, the perovskite active layer and the electron transport layer are all The film was prepared by a low-temperature solution method. In the present invention, a thin layer of cellulose film is added between the air-blood transport layer and the perovskite active layer of the perovskite solar cell. The cellulose can improve the surface wettability of nickel oxide, and it is easy to form a continuous and uniform perovskite film. The photoelectric conversion efficiency of titanium ore solar cells has increased from 12.52 to 13.37, an increase of 6.8%, with good repeatability and low cost, and has broad application prospects.

The invention provides a quantum dot light-emitting diode, comprising an anode and a cathode arranged oppositely, a quantum dot light-emitting layer arranged between the anode and the cathode, and a quantum dot light-emitting layer arranged between the anode and the quantum dot light-emitting layer The material of the hole transport layer is nickel oxide nanoparticles and carbon quantum dots, and the nickel oxide nanoparticles and carbon quantum dots are connected through ester groups.

The present invention provides a photosensitive element, a preparation method thereof, and a display device. The photosensitive element comprises: a substrate; a first electrode disposed on the substrate; an N-type doped silicon layer disposed on the first electrode a non-doped silicon layer, arranged on the N-type doped silicon layer; a molybdenum oxide layer, arranged on the non-doped silicon layer; an insulating layer, arranged on the molybdenum oxide layer and the substrate , the insulating layer is provided with a first opening to expose the molybdenum oxide layer; a second electrode is arranged on the insulating layer and the molybdenum oxide layer, and passes through the first opening and the molybdenum oxide layer touch. The photosensitive element provided by the present invention adopts the molybdenum oxide layer with high work function to replace the P-type material of the homojunction or heterojunction structure in the prior art, which not only saves the cost, but also can improve the hole transport efficiency of the photosensitive element, thereby improving the photosensitive element. component performance.

The invention belongs to the technical field of quantum dots, and in particular relates to a hole transport material, a preparation method thereof and a quantum dot light-emitting diode. The hole transport material includes zinc sulfide nanoparticles and nanoscale carbon nitride doped between the zinc sulfide nanoparticles. Doping nano-scale carbon nitride into zinc sulfide nanoparticles can obtain a hole-transporting material with a suitable band gap and strong hole-transporting ability. This hole-transporting material is used to prepare the hole-transporting layer of a QLED device. The luminous efficiency, luminous stability and service life of the device can be significantly improved.

The invention belongs to the technical field of materials, and in particular relates to a composite material, a preparation method thereof, and a quantum dot light-emitting diode. The composite material includes p-type metal oxide nanoparticles and nitrogen-doped graphyne dispersed in the p-type metal oxide nanoparticles. The nitrogen-doped graphyne is dispersed in p-type metal oxide nanoparticles, and the composite material formed is used as a hole transport material, which can improve the hole transport efficiency, thereby improving the luminous efficiency of the device.

The invention discloses a quantum dot light-emitting diode and a preparation method thereof. The quantum dot light-emitting diode comprises: an anode, a cathode, a quantum dot light-emitting layer arranged between the anode and the cathode, and a quantum dot light-emitting layer arranged between the anode and the quantum dot. A hole transport layer between layers, wherein the hole transport layer includes metal oxide nanoparticles and black phosphorus nanomaterials, the surface of the black phosphorus nanomaterials contains P-O-P bonds, and the black phosphorus nanomaterials The oxygen element in the P‑O‑P bond on the surface coordinates with the metal element in the metal oxide nanoparticles. In the hole transport layer of the present invention, by dispersing the black phosphorus nanomaterial between the metal oxide nanoparticles, the hole mobility of the metal oxide nanoparticles can be significantly improved, thereby improving the hole transport efficiency of the hole transport layer, and further Improve the luminous efficiency of quantum dot light-emitting diodes.