![]() Assessing the nature of the charge-transfer electronic states in organic solar cells. Critical role of intermediate electronic states for spin-flip processes in charge-transfer-type organic molecules with multiple donors and acceptors. Fast spin-flip enables efficient and stable organic electroluminescence from charge-transfer states. ![]() Optimal ways of colour mixing for high-quality white-light LED sources. Photophysics of diphenylacetylene: light from the “dark state”. Helical molecular orbitals to induce spin–orbit coupling in oligoyne-bridged bifluorenes. Highly emissive excitons with reduced exchange energy in thermally activated delayed fluorescent molecules. Achieving 37.1% green electroluminescent efficiency and 0.09 eV full width at half maximum based on a ternary boron–oxygen–nitrogen embedded polycyclic aromatic system. Solution-processable pure green thermally activated delayed fluorescence emitter based on the multiple resonance effect. Achieving pure green electroluminescence with CIE y of 0.69 and EQE of 28.2% from an aza-fused multi-resonance emitter. Wide-range color tuning of narrowband emission in multi-resonance organoboron delayed fluorescence materials through rational imine/amine functionalization. High-efficiency, long-lifetime deep-blue organic light-emitting diodes. Stable pure-blue hyperfluorescence organic light-emitting diodes with high-efficiency and narrow emission. Multi-resonance deep-red emitters with shallow potential-energy surfaces to surpass energy-gap law. Full-color, narrowband, and high-efficiency electroluminescence from boron and carbazole embedded polycyclic heteroaromatics. Indolocarbazole embedded multiple-resonance fluorophors for narrowband deep-blue electroluminescence with EQE ≈ 34.7% and CIE y ≈ 0.085. Narrowband deep-blue organic light-emitting diode featuring an organoboron-based emitter. ![]() Ultrapure blue thermally activated delayed fluorescence molecules: efficient HOMO–LUMO separation by the multiple resonance effect. Chlorinated indium tin oxide electrodes with high work function for organic device compatibility. White organic light-emitting diodes with fluorescent tube efficiency. Enhanced light out-coupling of organic light-emitting devices using embedded low-index grids. Recent advances in organic luminescent materials with narrowband emission. Recent progress in hot exciton materials for organic light-emitting diodes. Recent progresses on materials for electrophosphorescent organic light-emitting devices. All-organic thermally activated delayed fluorescence materials for organic light-emitting diodes. 2020 color gamut with quantum dot displays. QDs generate light for next-generation displays features. Going beyond the limit of an LCD’s color gamut. Moreover, in combination with a photoluminescence quantum yield of near 100% and a strong horizontal dipole orientation in the doped film, an excellent external quantum efficiency of 35.2% with suppressed efficiency roll-off is simultaneously obtained.Ĭhen, H. ![]() An ultrapure green OLED exploiting DBTN-2 as an emitter without optimized cavity effects and colour filters operated with Commission Internationale de l’Eclairage coordinates of (0.19, 0.74), satisfying the requirement for a commercial green OLED display. The introduction of the multiple carbazole moieties gives rise to a charge-resonance-type excitation feature of the triplet states, thus resulting in a high density of the triplet states and a rate of reverse intersystem crossing ( k RISC) as fast as 1.7 × 10 5 s −1. Furthermore, the different excitation characters of the singlet and triplet states enhance the spin–orbit couplings leading to highly efficient operation. This design concept substantially reduces the relaxation energy between the geometries of the excited and ground states, leading to a full-width at half-maximum emission of only 20 nm. Here, we designed and synthesized an ultrapure green emitter called DBTN-2, which is organoboron based and features a highly distorted fused π-conjugated molecular design. Organic light-emitting diode (OLED) technology is promising for ultrahigh-definition displays and other applications, but further improvements in efficiency and colour purity are desired.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |