23 results about "Singlet state" patented technology

A compound is described as having a triplet excited state and a singlet excited state; wherein the triplet excited state comprises a lowest energy triplet sublevel, a middle energy triplet sublevel, and a highest energy triplet sublevel; and wherein an energy separation between the highest energy triplet sublevel and the lowest energy triplet sublevel (ZFS) is greater than an energy separation between the singlet excited state and a the lowest energy triplet sublevel. Also described is a compound represented by the following Formula I. These compounds should find application as luminescent materials in organic light emitting diodes (OLEDs).

A compound is described as having a triplet excited state and a singlet excited state; wherein the triplet excited state comprises a lowest energy triplet sublevel, a middle energy triplet sublevel, and a highest energy triplet sublevel; and wherein an energy separation between the highest energy triplet sublevel and the lowest energy triplet sublevel (ZFS) is greater than an energy separation between the singlet excited state and a the lowest energy triplet sublevel. Also described is a compound represented by the following Formula I. These compounds should find application as luminescent materials in organic light emitting diodes (OLEDs).

This invention relates to an organic EL element having a light-emitting layer, a first layer connected to the light-emitting layer on the anode side, and a second layer connected to the light-emitting layer on the cathode side. The light-emitting layer contains a first, a second, and a third compound. The first layer contains a compound of formula (1), and the second layer contains a compound of formula (2). The first compound exhibits fluorescence, and the second compound exhibits delayed fluorescence. The singlet state energies S1 of the first, second, and third compounds satisfy S1(M3) > S1(M2) > S1(M1). In formula (1), Ra1-Ra5, Rb1-Rb5, and Rc1-Rc5 are each independently substituents, etc. In formula (2), X1-X3 are each independently N atoms, etc., and Ar1 and Ar2 are each independently groups of formula (2A) or aryl groups, etc. A is a group of formula (2A). In formula (2A), HAr is represented by formula (2B), a is 1-5, L1 is a linking group, etc. In formula (2B), X 11 ~X 18 Each can be an N atom, etc., and Y1 can be an O atom, S atom, or N atom, etc.

A method for determining an optimal spin / charge conversion operating point in a system including a pair of quantum dots including first and second quantum dots, the pair of quantum dots containing two charged particles and adopting a first charge state (2,0) in which both charged particles are in the first quantum dot, a second charge state (1,1) in which each quantum dot contains a charged particle, or a third charge state (0,2) in which both charged particles are in the second quantum dot, the charge state being a function of the voltage applied to at least two gates, the value of these voltages defining an operating point of the pair of quantum dots; the charged particles adopting a first spin state, called singlet spin state S, or a second spin state, called triplet spin state among the triplet spin state T0 or the triplet spin state T+ / T−.

The invention relates to a polarization entangled photon pair, in particular to a polarization entangled photon pair generation method and device based on a mixed framework, and the method comprises the steps: bidirectional excitation: a dual-wavelength polarization beam splitter (PBS) divides laser into two beams of light which are horizontally and vertically polarized, and the two beams of light are transmitted in the clockwise CW direction and the anticlockwise CCW direction of a Sagnac interference ring respectively; photon pair generation: the two beams of light are coupled into a waveguide, and in the waveguide, horizontal polarized light propagating along the clockwise CW direction and vertical polarized light propagating along the anticlockwise CCW direction respectively generate a pair of photon pairs; quantum interference and entanglement generation: after the two paths of photon pairs are output from the waveguide, the two paths of photon pairs converge at a dual-wavelength polarization beam splitter (PBS) again, the amplitudes of the two paths of photon pairs are coherently superposed by regulating and controlling the phase in a Sagnac interference ring, and an ideal polarization entanglement singlet state is generated at two output ports of the dual-wavelength polarization beam splitter (PBS); according to the invention, the defect that high brightness, high efficiency, high entanglement fidelity, high spectral purity and high photon indistinguishability cannot be synchronously realized can be effectively overcome.

The application belongs to the technical field of light emitting and display, and particularly discloses a near-violet thermal exciton luminescent material based on multiple resonance electron donor and acceptor units and application. The luminescent material takes 2,12-di-tert-butyl-5,9-diox-13b-boron naphtho[3,2,1-de] anthracene as an electron acceptor unit, and 2,5-di-tert-butyl indole [3,2,1-jk] carbazole as an electron donor unit. The two rigid MR donor and acceptor units are directly connected through a sigma bond, forming a small-angle dislocation non-coplanar structure, effectively inhibiting concentration quenching and red shift of the luminescent spectrum; meanwhile, the combination of the two MR units promotes the reverse intersystem crossing of the high-level triplet state to the degenerate singlet state (T6→S1 / S2), realizing efficient, narrow spectral band near-violet light emission of the material. The luminescent efficiency of the preferred solution processing organic light emitting device is as high as 12.01%, and has an attractive application prospect.

To provide a light-emitting element with excellent luminous efficiency. [Solution] A light-emitting element having an anode, a cathode, and a first layer and a second layer provided between the anode and the cathode, wherein the first layer is a layer containing a fluorescent compound whose absolute difference between the energy level of the lowest triplet excited state and the energy level of the lowest singlet excited state is greater than 0.50 eV, and two or more types of compound T, and the second layer is a layer containing a crosslinked compound having a crosslinking group, wherein compound T is (i) a compound whose absolute difference between the energy level of the lowest triplet excited state and the energy level of the lowest singlet excited state is 0.25 eV or less, and / or (ii) a compound represented by formula (T-1), TIFF2026053955000081.tif20170

The invention discloses a one-dimensional nuclear magnetic resonance total correlation spectrum generation method based on a singlet filtering technology, and relates to the field of nuclear magnetic resonance spectroscopy detection, and longitudinal magnetization of a target coupling atom pair is converted into a nuclear spin singlet signal by adopting adiabatic pulses designed according to specific atomic nucleus coupling relation information; after tau waiting time, the singlet signal is converted into a traditional zero quantum signal, and the target singlet signal is converted into an observable signal by adopting a hard pulse zero quantum filtering module. Obtaining complete coupling network information of the target signal through J coupling evolution by adopting a total correlation spectrum module of zero quantum filtering, and generating a one-dimensional nuclear magnetic resonance total correlation spectrum; two acting frequency points of adiabatic pulses are arranged on the left side and the right side of the middle frequency point of the target coupling atom pair, two obtained spectrograms are subtracted, and the sensitivity and the selectivity are further improved. The method is suitable for various different sample systems, and has strong robustness and high sensitivity.

One aspect of the invention relates to a method for determining an optimal spin / charge conversion operating point in a system comprising a pair of quantum dots including a first quantum dot and a second quantum dot, the pair of quantum dots containing two charged particles and adopting a first charge state (2,0) in which the two charged particles are in the first quantum dot, a second charge state (1,1) in which each quantum dot contains one charged particle, or a third charge state (0,2) in which the two charged particles are in the second quantum dot, the charge state being a function of the voltage applied to at least two grids, the value of these voltages defining an operating point of the pair of quantum dots;charged particles adopting a first spin state, called singlet spin state S, or a second spin state, called triplet spin state, from among the triplet spin state T0 or the triplet spin state T+ / T-.;

To provide an organic light-emitting device with excellent color purity. 【Solution means】The light-emitting layer contains a first compound and a second compound. The first compound is a compound having a luminescence lifetime of 500 [nsec] or more, or a difference between the lowest excited singlet energy and the lowest excited triplet energy of 0.25 [eV] or less. The second compound is a fluorescent light-emitting material. An organic light-emitting device characterized by satisfying the following formula [1]. 8000≦(S1(A)-E(λ max ))×ε [1] S1(A) [eV]: The lowest excited singlet energy of the first compound λ max [nm]: The absorption peak wavelength located on the longest wavelength side among the absorption spectra of the second compound E(λ max ) [eV]: The energy corresponding to λ max ε [M -1 ·cm -1 : The molar absorption coefficient of the second compound at λ max [nm]

The application provides a kind of porous crystalline material and its preparation method and application as variable temperature luminescent material, belong to metal organic framework material technical field.The molecular formula is: C 25 H 21 NO8PLn, wherein Ln is europium ion or terbium ion.The material contains dynamic molecular rotor module ligand H3TPO, and the energy level of the lowest excited singlet state (S1) and triplet state (T1) can be elastically adjusted with temperature change, and this characteristic makes isomorphic materials Eu-PO and Tb-PO exhibit rare and completely opposite thermoluminescence behavior.The application not only provides a new idea for regulating the energy level of dynamic antenna to construct artificial intelligent luminescent material, but also opens up a new direction for developing high-performance X-ray scintillators based on Ln-MOFs.

The invention discloses a coumarin modified fluorescent organic silicon pressure-sensitive adhesive based on click reaction and a preparation method thereof, and relates to a coumarin modified fluorescent organic silicon pressure-sensitive adhesive and a preparation method thereof. The invention aims to solve the problem of poor adhesion performance of the existing organic silicon pressure-sensitive adhesive. The organic silicon pressure-sensitive adhesive can be simply, conveniently and effectively synthesized through cross-linking and thermocuring of a click reaction between vinyl in the vinyl silicone resin and sulfydryl on the coumarin modified mercaptopropyl silicone rubber, and the coumarin forms a rigid fused ring conjugated pi electron system due to benzo alpha-pyrone mother nucleus of the coumarin, so that the organic silicon pressure-sensitive adhesive can be used for preparing the organic silicon pressure-sensitive adhesive. After coumarin molecules absorb ultraviolet light, pi electrons in a conjugated system are transited to a high-energy excitation singlet state and then rapidly relaxed to the lowest excitation singlet state through internal conversion and vibration relaxation, and part of energy is dissipated as heat energy in the process; finally, the molecules in the lowest excitation singlet state release energy in a radiative transition mode to return to the ground state, and fluorescence is generated. The invention belongs to the technical field of pressure-sensitive adhesive preparation.

An organic molecule is disclosed for improving the display properties of OLED devices. The organic molecule may include a structure represented by Formula 1, and the structure is modified by suitable fragments which may result in similar occupied spaces in HOMO and LUMO, thereby resulting in a lower energy level of the singlet excited state S1, a lower energy level of HOMO, and a reduced energy difference between the singlet excited state S1 and the triplet excited state T1 of the organic molecule. An OLED device including the organic molecule shows improved quality, high efficiency, and long-life characteristics.

An organic solid upconversion material which contains two or more types of triplet sensitizers and an organic light-emitting material, and which is characterized in that: the maximum absorption wavelengths [lambda] MAX (TS) of the two or more types of triplet sensitizers in a region on the longer wavelength side than the maximum emission wavelength [lambda] MAX (EM) of the organic light-emitting material are different from each other; the minimum excited triplet energy of each of the two or more types of triplet sensitizers is equal to or greater than the minimum excited triplet energy of the organic light-emitting material, and the minimum excited singlet energy of each of the two or more types of triplet sensitizers is less than the minimum excited singlet energy of the organic light-emitting material.

The application relates to a high-efficiency organic luminescent co-crystal design, preparation and application, a host-guest doped luminescent material taking iodine-substituted carbazole derivatives as the host and application of the luminescent material in scintillation crystals, strong electron-accepting molecules are used as electron acceptors, twisted structure triphenyl phosphine oxide derivatives are used as electron donors, and the organic luminescent co-crystal is prepared through a solution evaporation method. The donor and acceptor molecules are combined and assembled into organic luminescent co-crystals with more rigid structures and more compact arrangements through non-covalent bond interaction. The non-covalent bond interaction in the co-crystal, especially the intermolecular charge transfer, can make the energy gap between the singlet state and the triplet state narrow, improve the intersystem crossing rate, and improve the utilization rate of the triplet exciton, so that high-efficiency luminescence is realized. The application provides a new design strategy for the design and preparation of novel organic luminescent materials, and is suitable for organic light-emitting diodes (OLEDs).

Energy transfer from a thermally activated delayed fluorescence (TADF) emitter to coupled surface plasmon polariton (SPP) modes of a metal mirror can be utilized to reduce the observed TADF lifetime in a cavity. The Purcell effect reduces the radiative lifetimes of both the singlet (S1) and triplet (T1) states to a similar extent according to the inverse of the simulated Purcell factor (PF). A direct correlation between faster TADF lifetime and enhanced operational stability of fabricated TADF OLEDs was shown due to reduction in triplet mediated annihilation events without any loss in external quantum efficiency (EQE). The design strategies to best utilize the Purcell effect for TADF OLED lifetime elongation were proposed. The extent of Purcell enhancement can be tuned by the choice of TADF emitter, metal electrode, transporting layer properties and device structure design.

This invention relates to the field of functional materials technology, and discloses an anti-Kasha organic long-afterglow material, its preparation method, and its applications. The anti-Kasha organic long-afterglow material provided by this invention precisely reconstructs the excited-state energy levels of guest molecules through a sulfur oxidation strategy. Using melamine-formaldehyde resin as a rigid matrix, a pure organic long-afterglow material system with both high quantum yield and anti-Kasha type multiple phosphorescence emission is successfully constructed. Compared with the unoxidized system, the singlet-triple bandgap of the oxidized molecules is significantly reduced from 1.264 eV to 0.944 eV, significantly enhancing the intersystem crossing efficiency. At the optimal doping concentration, a phosphorescence quantum yield of up to 63.1% and a total quantum yield of 88.5% are achieved. Furthermore, the oxidized molecules form a dense multi-triple energy level layout, effectively suppressing the internal conversion from the high-energy triplet state to the lowest triplet state in the rigid matrix. For the first time in this type of system, anti-Kasha type multiple room-temperature phosphorescence emission precisely tunable by the excitation wavelength is achieved.

The present invention describes electronic devices and compositions that can be used in electronic devices, the electronic devices including a sensitizer and a fluorescent emitter, wherein the sensitizer is a phosphorescent compound and wherein at least one of the two following conditions (I) or (II) must be satisfied, it being preferable when condition (I) is satisfied:S1K(FE)−S1K(S)≥X  (I)S1max(FE)−S1max(S)≤Y  (II)wherein, e.g., X, Y are each −0.5 eV; S1K(FE) is the energy of the first excited singlet state of the fluorescent emitter; S1K(S) is the energy of the first excited state of the sensitizer; S1max(FE) is the energy of the first excited singlet state of the fluorescent emitter; S1max(S) is the energy of the first excited state of the sensitizer; and wherein the photoluminescence spectra of the sensitizer and of the fluorescent emitter are determined at room temperature.

This invention relates to an organic EL element having an anode, a cathode, and a light-emitting layer contained between the anode and the cathode. The light-emitting layer comprises a delayed-fluorescence compound M2 and a compound M3 represented by general formula (100), wherein the singlet state energy S1(M2) of compound M2 and the singlet state energy S1(M3) of compound M3 satisfy the mathematical relationship (Formula 1). In general formula (100), X1 is an oxygen atom or a sulfur atom, C1 is a carbon atom, and R... 11 ~R 18 R2, R 31 R 32 R 34 R 35 R4 and R 45 ~R 48 Each can be an independent hydrogen atom or substituent, etc., with n being 1, 2, or 3. Where L1 is a single bond, n is 1, k is 1, 2, or 3, m is 2, 3, or 4, k+m=5, and L1 is a single bond or a linking group. S1(M3) > S1(M2) (number 1)

The disclosed method of quench condensation of hydrogen isotopes for qubit applications includes using a non-hermetic sample cell geometry having an open sample cell with a chip holder surrounded by a radiation shield, and a completely opened geometry without extra chip shielding. The method may include growing thin epitaxial solid hydrogen films from the liquid phase and condensation of hydrogen gas onto the cold chip surface known as quench condensation. A corresponding electron qubit apparatus may include electrons trapped on the surface of solid hydrogen isotopes, H2, D2, and HD. The qubit apparatus may be configured as spin-qubit device based on a double-quantum dot and / or singlet-triplet qubit approach.

An organic electroluminescent device that comprises a first electrode, a second electrode, and an organic emission layer EML comprising: one metal-organic host compound MOH, and one organic emitter compound OE. The metal-organic host compound MOH has a total spin of ≥½ and / or possessing one or more unpaired electrons. The lowest electronically excited state within the emission layer EML is an exciplex EXMOH / OE formed by a single electron transfer between the MOH and the OE. The energy of the first excited triplet state of the organic emitter T1OE is resonant or higher as compared to the energy of the Exciplex EEEX: T1OE≥EEEX. The energy difference of the emitting first excited singlet state S1OE and the energy of the exciplex is less than 0.4 eV: S1OE−EEEX≤0.4 eV.

The present invention relates to organic light-emitting devices comprising (a) an anode, (i) a cathode, and (e) an emitting layer between the anode and cathode, comprising 2 to 40% by weight of a triplet emitter X having a difference of the singlet energy (ES1(X)) and the triplet energy (ET1(X)) of less than or equal to 0.4 eV [Δ(ES1(X))−(ET1(X))≤0.4 eV], 0.05 to 5.0% by weight of a fluorescent emitter Y and 55 to 97.95% by weight of a host compound(s), wherein the amount of the triplet emitter X, the fluorescent emitter Y and the host compound(s) adds up to a total of 100% by weight and the singlet energy of the triplet emitter X (ES1(X)) is greater than the singlet energy of the fluorescent emitter Y (ES1(Y)) [(ES1(X))>ES1(Y)]. By doping, for example, an emitting layer containing a luminescent organometallic complex having a small S1-T1 splitting, with a fluorescent emitter the emission decay time can significantly be shortened without sacrificing external quantum efficiency (EQE) because of very efficient energy transfer.

An organic electroluminescent device having a cathode and an anode and an organic light-emitting layer interposed between the two electrodes, and the light-emitting layer contains organic molecule I, organic molecule II and organic molecule III, wherein the organic molecule I is a host material, the organic molecule II is a sensitizing material, the organic molecule III is a light-emitting material, and the organic molecule I, the organic molecule II and the organic molecule III satisfy the condition represented by the following formula (A), Formula (A): E S1 (I) > E S1 (II) > E S1 (III) in the above formula (A), E S1 (I) represents the lowest excited singlet state energy level of the organic molecule I, E S1 (II) represents the lowest excited singlet state energy level of the organic molecule II, E S1 (III) represents the lowest excited singlet state energy level of the organic molecule III.