15 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 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.

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

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.

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.

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.

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.

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.