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High-color purity emissions with small a full-width at half-maximum (FWHM) are ongoing pursuit for high-resolution displays. Though the flourishment of narrow-band emissive materials with multi-resonance induced thermally activated delayed fluorescence (MR-TADF) in blue region, such materials haven't validated their potential in other color regions. By amplifying the influence of skeleton and peripheral units, a series of highly efficient green-emitting MR-TADF materials are firstly reported here. It is found that peripheral units with electron-deficit property can significantly narrow the energy gap for bathochromic emission without compromising the color fidelity. MR-TADF emitters with photo-luminance quantum yields of above 90% with FWHMs of ≤ 25 nm are thereof developed. The corresponding organic light-emitting diodes show maximum external quantum efficiency/ power efficiency of 22.02%/ 69.82 lm/W with excellent long-term stability.
This article was published in the following journal.
Name: Angewandte Chemie (International ed. in English)
A new class of thermally activated delayed fluorescent donor-acceptor-donor-acceptor (D-A-D-A) π-conjugated macrocycle comprised of two U-shaped electron-acceptors (dibenzo[,]phenazine) and two elect...
The basic design principle for emitters exhibiting thermally activated delayed fluorescence (TADF) is the minimization of the singlet-triplet gap. While typically this gap is positive, a possible inve...
The present investigation demonstrates the preparation of thermally activated sepiolite for effective removal of fluoride via adsorption from an aqueous solution. The thermal treatments on sepiolite w...
Manipulating triplet states is technically intriguing for organic semiconductors and photochemical conversion. Sensitized photon upconversion that converts low-energy photons into higher-energy ones v...
Developing luminescent probes with long lifetime and high emission efficiency is essential for time-resolved imaging. However, the practical applications usually suffer from emission quenching of trad...
The study offers narrowband UVB light therapy to patients who have 5% of their body involved with vitiligo. The hypothesis is that Narrowband UVB promotes melanocyte proliferation in viti...
Alefacept is a new anti-psoriatic drug within the group of the so-called biologics. In about 30% of patients alefacept induces a more than 75% improvement of psoriasis after a 12-week trea...
Narrowband ultraviolet B phototherapy is the "standard" phototherapy for atopic eczema; ultraviolet A1 is sometimes used but is not a widely available treatment. We do not know the most im...
A single center study of 30 patient receiving Narrowband UVB phototherapy three times weekly for 12 weeks. Patients will be evaluated through week 36 to evaluate maintenance of response.
This longitudinal, prospective study aims to establish the magnitude and time course of changes in intestinal permeability; establish the optimal method for assessment of intestinal permea...
Techniques for determining the proximity of molecules based on ENERGY TRANSFER between bioluminescent chromophores and acceptor fluorophores that have overlapping emission and absorption spectra.
Magnetic resonance spectroscopy involving detection of changes in the resonance of carbon-13 nuclei in organic molecules.
A technique applicable to the wide variety of substances which exhibit paramagnetism because of the magnetic moments of unpaired electrons. The spectra are useful for detection and identification, for determination of electron structure, for study of interactions between molecules, and for measurement of nuclear spins and moments. (From McGraw-Hill Encyclopedia of Science and Technology, 7th edition) Electron nuclear double resonance (ENDOR) spectroscopy is a variant of the technique which can give enhanced resolution. Electron spin resonance analysis can now be used in vivo, including imaging applications such as MAGNETIC RESONANCE IMAGING.
A member of the TNF receptor family that was initially identified as a DEXAMETHASONE-induced protein from a T-CELL line. It may play a role in regulating APOPTOSIS and modulating immune response by T-lymphocytes. Signaling by the activated receptor occurs through its association with TNF RECEPTOR-ASSOCIATED FACTORS.
Spectroscopic method of measuring the magnetic moment of elementary particles such as atomic nuclei, protons or electrons. It is employed in clinical applications such as NMR Tomography (MAGNETIC RESONANCE IMAGING).