5 results about "Singlet state" patented technology

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.

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)