67 results about "Exciton" patented technology

The present application relates to the field of organic electroluminescent material technology, and in particular, to an organic compound, an organic electroluminescent device comprising same, and an electronic apparatus. The compound of the present application comprises a polycyclic conjugated core structure. When used as the host material of a light-emitting layer, the compound of the present application can improve the carrier balance in the light-emitting layer, widen the carrier recombination region, improve the exciton generation and utilization efficiency, and increase the light-emitting efficiency and service life of the device.

The application discloses a host material, an organic electroluminescent material containing double hosts and application thereof, and relates to the field of organic electroluminescent materials. The structure of the host material is shown in general formula 1: the first host material with a triazine skeleton is connected with two benzene mother nuclei at different positions of a naphthalene ring, and the rigid planar structure brings high glass transition temperature and thermal decomposition temperature. One benzene is fixed at an ortho position of the triazine ring, and a dibenzofuran is used as a main host group at another position of the triazine ring, which can efficiently transport electrons, balance electrons and holes, realize a wider exciton recombination region and higher exciton utilization, and effectively reduce the driving voltage and efficiency roll-off. Meanwhile, the second host with a triarylamine structure is matched, which can simultaneously enhance the hole transport and electron transport capacity, so that when the holes are injected into the p-type host and the electrons are injected into the n-type host, the driving voltage is reduced, and the luminous efficiency and the service life are also significantly enhanced.

This invention relates to the field of optical technology, specifically to a multi-mode FP-anapole-exciton system that achieves multiple strongly coupled Rabi splits. The system comprises basic units arranged in a two-dimensional periodic pattern, with a square period. Each basic unit includes, from bottom to top, a first dielectric layer, a first metal layer, a composite layer, a second metal layer, and a second dielectric layer. The composite layer includes a transparent dielectric and a heterogeneous disk embedded within it. The heterogeneous disk includes, from top to bottom, a first dielectric disk, a semiconductor disk, and a second dielectric disk. This invention utilizes incident light waves to induce excitation of multiple FP-cavity modes, anapoles, and excitons. Through precise structural design and parameter adjustment, it achieves strong coupling between these multiple FP-cavity modes, anapoles, and excitons, expanding the number of Rabi splits, enhancing the strength of the three-mode coupling, and obtaining multiple large Rabi splitting energies. It has broad application prospects in ultrafast optical switches, Bose-Einstein condensates, and low-threshold lasers.

The application relates to the technical field of organic light-emitting display, and discloses a cyano-substituted aryl ring-connected triazine compound and application thereof. The cyano-substituted aryl ring-connected triazine compound has a structure as shown in formula (I), the compound provided by the application has high bond energy between atoms, good thermal stability, is conducive to solid-state stacking between molecules, is conducive to injection and migration of excitons, can effectively reduce the driving voltage of an organic electroluminescent device when used as an electron transport material, improves the light-emitting efficiency of the organic electroluminescent device, and prolongs the service life of the organic electroluminescent device. Meanwhile, the cyano substitution can adjust the energy level of the compound, the HOMO and LUMO energy levels are deepened, the compound is more matched with adjacent layers, and the device voltage is reduced. The application further provides an organic electroluminescent device and a display device containing the compound of formula (I).

This invention discloses a method for preparing and applying a gold cluster scintillator protected by a stable luminescent free radical ligand. The scintillator material uses (3,5-dichloro-4-pyridine)bis(2,4,6-trichlorobenzene)methyl free radical (PyBTM) as a ligand, and a chain-like tetranuclear free radical cluster is constructed using a one-pot method. The chemical formula of the compound is [Au4(PNP)2(PyBTM)2](SbF6)4, belonging to the triclinic crystal system, space group R-3. This free radical cluster scintillator achieves 100% theoretical exciton utilization and a short radiation decay lifetime due to its unique doublet emission mechanism. These properties make it an ideal candidate material for overcoming the contradiction between high luminous yield and fast response in traditional scintillators. Due to the excellent thermal and water-oxygen stability of this system, it can be fabricated into a scintillator screen to further achieve high-quality X-ray imaging with a spatial resolution of up to 31 LP·mm. ‑1 This provides a general design strategy for high-performance radiation detection materials.

The application discloses a blue OLED device and a display device, which comprises an anode, a hole layer, a light-emitting layer, an electron layer and a cathode which are stacked in sequence; and further comprises an additional layer which is arranged between the hole layer and the light-emitting layer and / or arranged between the light-emitting layer and the electron layer. The blue OLED device provided by the application can effectively stabilize the exciton density in the light-emitting layer, inhibit TTA and TPA from the root cause, and solve the device aging problem caused by TTA and TPA.

This invention provides a perovskite quantum dot based on halogen composition regulation, its preparation method and applications, perovskite solar cells and optoelectronic devices, belonging to the technical field of perovskite optoelectronic functional materials and devices. This invention constructs β-CsPbI 3‑x‑y Br x Cl y The halogen-controlled system, by precisely adjusting the type and ratio of halogen doping, achieves continuous and controllable adjustment of lattice parameters, band structure, and exciton recombination dynamics while maintaining the stability of the β-phase all-inorganic framework. The prepared perovskite quantum dots can fully leverage their low trapped state density, and combined with improved lattice stability, enhance the conversion efficiency and operational stability of solar cells.

This invention provides a method for determining the dislocation density of diamond single crystals using cathodoluminescence spectroscopy, which can be applied to the field of semiconductor material characterization and defect detection. This method draws upon and develops upon colorimetric methods based on ultraviolet light intensity, utilizing the idea of ​​single measurement and quantitative analysis based on different peak ratios. It also incorporates a decoupled architecture of "destructive calibration + non-destructive measurement." First, at least five diamond single crystal calibration samples with gradient dislocation densities are selected. Cathodoluminescence spectra are acquired under low temperature and high vacuum conditions. The integrated intensity I of the A-band emission peak related to dislocations is extracted through multi-peak fitting. A and the integral intensity I of the free exciton emission peak FE Calculate the ratio R=I A / I FE Subsequently, the calibration sample was subjected to hydrogen-oxygen dry etching, and the surface dislocation density N was obtained by statistically analyzing the etching pits. The proportionality coefficient k was obtained by linear fitting with N as the ordinate and R as the abscissa. For the sample to be tested, the spectrum was collected under the same conditions and the ratio R was calculated. Substituting this value into the model N=k·R, the surface dislocation density can be quantitatively obtained.

The application provides a compound of formula (I), the bond energy between atoms is high, the compound has good thermal stability, and the solid-state stacking between molecules is favorable, and the energy level between adjacent layers is suitable, which is favorable for the injection and migration of excitons. When used as an electron transport material, the compound can effectively reduce the driving voltage of an organic electroluminescent device, improve the light-emitting efficiency of the organic electroluminescent device, and prolong the service life of the organic electroluminescent device. The application also provides an organic electroluminescent device and a display device comprising the compound of formula (I).

This invention provides an organic eutectic material with a controllable charge-transfer exciton diffusion coefficient and its preparation method. The molecular formula of this organic eutectic material is (TSB). x (TSB-Br) 1‑x (TCNB)2, wherein TSB is trans-1,2-stilbene, TSB-Br is trans-4-bromostilbene, TCNB is 1,2,4,5-phenylenetetraacetonitrile, and x is the proportion of TSB molecules. The organic eutectic material prepared by this invention has a regular morphology, high crystallinity, and exhibits both strong and delayed fluorescence emission, with continuously tunable diffusion coefficients for singlet and triplet charge-transfer excitons. The preparation method described in this invention has advantages such as low raw material cost, mild conditions, and simple operation. The prepared (TSB)2... x (TSB-Br) 1‑x (TCNB)2 organic eutectic materials have potential applications in fields such as imaging, photoelectric conversion, and spintronics.

The utility model discloses an exciton polaron laser based on open microcavity, including casing, piezoelectric displacement platform, upper DBR mirror and lower DBR mirror, the cavity with one -way opening has in casing, upper DBR mirror is assembled in the cavity, and is close to the opening, lower DBR mirror is provided with exciton gain dielectric layer, piezoelectric displacement platform can lift and lower the assembly in the cavity far from the opening one side, lower DBR mirror is fixed in piezoelectric displacement platform, to make lower DBR mirror close or far from upper DBR mirror, and piezoelectric displacement platform is used for fine adjustment lower DBR mirror's displacement distance, such can respectively coarse adjustment and fine adjustment to the microcavity cavity length between upper DBR mirror and lower DBR mirror, and then guarantee the strong coupling state between exciton and cavity photon, after continuing to increase the light power, can form polarized plasmon condensation, also can conveniently regulate and control the energy difference between cavity photon and exciton.

This invention discloses a solid additive material for photoelectric converters, its application, and its preparation. The solid additive material for photoelectric converters comprises compounds having the structure shown in the following formula: the structure of the photoelectric converter, from bottom to top, includes a transparent substrate, a transparent electrode layer, a hole transport layer, a photoactive layer, an electron transport layer, and a metal electrode layer; the material of the photoactive layer includes a donor material, an acceptor material, and the solid additive material for photoelectric converters. The solid additive material for photoelectric converters of this invention can effectively control the morphology of the active layer, thereby improving the performance of photovoltaic devices. After addition, the acceptor molecules in the active layer are arranged more compactly and orderly, thereby improving the internal carrier physics processes, enhancing exciton dissociation, improving charge transport, and reducing charge recombination, thus significantly increasing the short-circuit current density and fill factor of the photoelectric converter, and obtaining higher photoelectric conversion efficiency.

The application provides a method, a system and an application of a rare earth nanoparticle-induced long-life charge transfer excited state of an organic molecule. The application is a long-life charge transfer excited state system of a rare earth nanoparticle-induced organic molecule, in which a lanthanide rare earth nanoparticle and an organic molecule are compounded; the diameter of the rare earth nanoparticle is between 10 nm and 20 nm, and the surface is exposed to a dangling bond and a rare earth cation through acid washing. Under the irradiation of an excitation light, the organic molecule produces an exciton between molecules and undergoes charge separation under the effect of a spin-orbit coupling, the separated exciton recombines to generate long-life charge transfer state luminescence, and can be applied to the fields of organic molecule life control, trace water molecule sensing, trace solvent sensing, trace water dose detection and the like.

This invention discloses a one-dimensional copper-iodine-based hybrid perovskite semiconductor material synthesized from imidazole, cuprous iodide, sodium phosphate, and hydroiodic acid using a solution-cooled crystallization method. The chemical formula is (C3H5N2)3CuI6. The preparation method includes the following steps: Step 1, weighing raw materials: weigh imidazole and cuprous iodide; Step 2, mixing raw materials: place imidazole and cuprous iodide in a glass bottle, add sodium phosphate and hydroiodic acid; Step 3, heating and stirring: heat and stir until dissolved; Step 4, cooling and crystallizing: place in situ and cool; Step 5, preliminary identification of the product: irradiate the crystal with an ultraviolet lamp and observe the color of the reflected light; Step 6, filtration and drying: filter and dry the crystal to obtain the product. This invention is simple and, by introducing cuprous iodide, achieves strong exciton recombination and efficient self-trapped exciton emission, exhibiting good photoelectric conversion performance, thus replacing lead-based hybrid perovskite materials to a certain extent.

This invention discloses a sub-picosecond ultrafast scintillator, its preparation method, and its applications. The invention employs ligand-assisted deposition and high-temperature thermal injection to prepare all-inorganic metal halide perovskite CsPbCl3 nanocrystals. Through size optimization and ligand engineering, a strategy is proposed to passivate shallow defect levels, reducing the carrier residence time in shallow defect states while appropriately retaining deep defect levels. This achieves exciton recombination path renormalization in the nanocrystals, ultimately realizing ultrafast scintillation of <100 ps at room temperature.

The application provides an organic electroluminescence device, and relates to the technical field of organic electroluminescence. The organic electroluminescence device comprises an anode, an organic layer and a cathode, the organic layer comprises a hole transport region, the hole transport region comprises a first hole transport layer and a second hole transport layer, the first hole transport layer contains a carbazole derivative shown in structural formula 1, and the second hole transport layer contains an arylamine compound shown in structural formula 2. The organic electroluminescence device can not only effectively transport holes, but also make the transport of holes and electrons more balanced, and can also limit the carriers in the light-emitting layer, so that the holes and electrons can effectively combine in the light-emitting layer to form excitons to emit visible light. Therefore, the organic electroluminescence device has excellent photoelectric properties, specifically, has a low driving voltage, a high luminous efficiency and a long service life.

The application belongs to the technical field of OLED and specifically comprises an organic compound for a blue light device and a blue light organic electroluminescent device. The structural general formula of the organic compound is shown in the following. The application directly connects a benzofuranphenanthrol group to the 12th position of a benzanthracene nucleus, which can utilize the oxygen atom on the furan to increase the polarity and intermolecular interaction of the molecule, improve the molecular orientation when the material is stacked, thereby strengthen the permanent spontaneous orientation polarization effect, and obtain a better voltage improvement effect; on the other hand, the direct connection of the phenanthrene ring on the benzofuranphenanthrol group to the 12th position of the benzanthracene can improve the electron mobility of the material, thereby improving the electron density in the light-emitting layer, and with the increase of the electron density, the carrier recombination probability can be significantly improved, thereby reducing the accumulation of holes in the light-emitting layer, reducing the exciton quenching condition, and improving the device efficiency.I

The application discloses an ultrafast response organic photoelectric detector based on light field control, which has a bulk heterojunction structure and sequentially comprises a transparent substrate, an anode, a hole transport layer, a photosensitive layer, an electron transport layer, a hole blocking layer and a cathode. 70 The photosensitive layer is a blending layer of an electron donor material and an electron acceptor material. 60 The electron transport layer material is C 60 The material of the hole transport layer is Rubrene or TAPC. The application adopts the light field control mode, suppresses the diffusion process of excitons, realizes the ultrafast response speed, reaches the sub-nanosecond response in the red light band, and the highest bandwidth is up to 970MHz.

The present application relates to a kind of organic red light compounds shown in formula I and its application in organic electroluminescent device.The compound of the present application is a kind of asymmetric donor-acceptor type organic red fluorescent small molecule, with obvious charge transfer (HLCT) excited state properties, can take into account the high photoluminescence efficiency of solid state doped thin film and high exciton utilization in electroluminescence.This kind of material is used as light emitting layer in device with CBP doping, can prepare high-efficiency red light device, has important application value in full-color display and white light illumination field.

This invention discloses a compound containing triazine and phenanthrene, belonging to the field of semiconductor materials technology. The structure of the compound is shown in general formula (1). This compound has good electronic modulation ability and hole and exciton blocking ability, and also has good stability. When the compound of this invention is used as a hole blocking layer material for organic electroluminescent devices, the luminous efficiency and working life of the organic electroluminescent devices can be significantly improved. General formula (1)

This invention belongs to the field of photocatalytic materials technology, specifically relating to a method and application of a one-step in-situ synthesis of a homo-heterojunction composite photocatalyst based on cyanophenylacetylene copper / phenylacetylene copper (CN-PhC₂Cu / PhC₂Cu). This invention achieves one-step in-situ synthesis of a homo-heterojunction composite photocatalyst with a tight interface structure under mild conditions by controlling the ratio of cyanophenylacetylene copper (CN-PhC₂Cu) to phenylacetylene copper (PhC₂Cu). This heterojunction effectively promotes exciton dissociation and photogenerated electron delocalization, significantly suppresses charge recombination, and improves visible light utilization efficiency. Experiments show that this composite photocatalyst exhibits excellent degradation performance for various water pollutants such as diclofenac (DCF) under visible light irradiation, possessing advantages such as high degradation efficiency, wide pH adaptability, and strong resistance to interference from coexisting ions. The method of this invention is simple and operates under mild conditions, providing new materials and technical support for efficient visible light-driven water pollution control.

The application provides an organic-inorganic hybrid lead-based halide perovskite material and a preparation method and application thereof. The organic-inorganic hybrid lead-based halide perovskite material has a one-dimensional face-sharing perovskite structure or a quasi-one-dimensional face-sharing perovskite structure, and a chemical general formula of the organic-inorganic hybrid lead-based halide perovskite material is APbX3, A includes an alkyl-substituted triphenylphosphine cation, and X is at least one of halogen elements. The organic-inorganic hybrid lead-based halide perovskite material provided by the application has a one-dimensional or quasi-one-dimensional face-sharing perovskite structure under a specific component composition, can simultaneously realize material properties of no self-absorption and nanosecond-level ultrafast self-trapped exciton emission, has a large Stokes shift, breaks through the traditional STE ''slow decay'' fixed limit, has a high X-ray absorption capacity, has low detection limit and high spatial resolution, and is suitable for low-dose and high-resolution imaging.

This disclosure relates to a dielectric layer response-based field effect transistor photodetector, comprising a gate, a photoelectric response composite dielectric layer, a carrier transport layer, a source, and a drain. The composite dielectric layer is formed by compounding a photoelectric response dielectric and a charge blocking insulating dielectric; the carrier transport layer is used for transporting electrons or holes, the photoelectric response dielectric is used for absorbing light under illumination to generate electrons, holes or excitons, and the charge blocking insulating dielectric is used for limiting passage of the electrons, holes or excitons. The generation of photogenerated electrons, holes or excitons in the composite dielectric layer and the movement of the photogenerated electrons, holes or excitons limited within the photoelectric response dielectric cause the equivalent permittivity of the composite dielectric layer to change, causing changes in carrier concentration and conductivity of the carrier transport layer and achieving photoelectric detection.

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.

To provide a light-emitting device with high emission efficiency and high reliability. A light-emitting layer of the light-emitting device includes a first substance emitting light from a doublet excited state based on f-d transition and a second substance that is a fluorescent substance. The longest-wavelength absorption edge among absorption edges in the absorption spectrum of the first substance is positioned at a wavelength shorter than the wavelength of the longest-wavelength absorption edge among absorption edges in the absorption spectrum of the second substance. The first substance has a short exciton lifetime and high exciton generation efficiency, and efficient energy transfer occurs between the first substance and the second substance; thus, the light-emitting device can have high emission efficiency and high reliability.

The application relates to the technical field of two-dimensional material exciton regulation, in particular to an optical encryption device based on three-dimensional field exciton regulation of two-dimensional materials and a regulation method. The device comprises a two-dimensional material optical device, which comprises a semiconductor substrate, a ferroelectric material substrate and a II-type heterojunction structure formed by two-dimensional materials; a bias electrode; and a laser assembly arranged on the side of the II-type heterojunction structure away from the semiconductor substrate and spaced apart from the two-dimensional material optical device; a longitudinal bias assembly electrically connected to the bias electrode and the semiconductor substrate and providing longitudinal bias for the II-type heterojunction structure; and a transverse electric field assembly comprising a transverse field electrode arranged on the side of the two-dimensional material optical device and spaced apart from the two-dimensional material optical device and providing external transverse electric field for the II-type heterojunction structure. The optical encryption device can realize regulation of excitons in three dimensions, increase the exciton regulation dimension, and thus improve the encryption complexity and the adjustable degree.