Provided are organometallic compounds. Also provided are formulations comprising these organometallic compounds. Further provided are OLEDs and related consumer products that utilize these organometallic compounds.

Disclosed herein are metal compounds useful in devices, such as, for example, OLEDs.

An organic light-emitting device including a first electrode, a second electrode facing the first electrode, and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer includes an emission layer, wherein the organic layer further includes i) an organometallic compound represented by Formula 1, and ii) at least one selected from a first compound represented by Formula 51, a second compound represented by Formula 61, a third compound represented by Formula 81, and a fourth compound represented by Formula 91, wherein Formulae 1, 51, 61, 81, and 91 are the same as described in the specification.

Provided are a fluorescent probe, a preparation method therefor and a use thereof. The fluorescent probe sensitively and specifically responds to viscosity, and can be used for the specific fluorescence labeling of proteins as well as in the quantification, detection or kinetic study of proteins and the imaging of cells, tissues and living bodies.

The invention relates to purely organic emitter molecules of a new type according to formula I and to the use thereof in optoelectronic devices, in particular in organic light-emitting diodes (OLEDs), comprising donor D: an aromatic or heteraromatic chemical group on which the HOMO is located and which optionally has at least one substitution; acceptor A: an aromatic or heteromatic chemical group on which the LUMO is located and which optionally has at least one substitution; bridge B1, bridge B2: organic groups that link the donor D and the acceptor A in a non-conjugated manner; wherein in particular the energy difference ΔE(S.sub.1−T.sub.1) between the lowest excited singlet (S1) state of the organic emitter molecule and the triplet (T1) state of the organic emitter molecule lying thereunder is less than 2000 cm.sup.−1.

A compound having the formula [L.sub.A].sub.3-nIr[L.sub.B].sub.n is disclosed. In the formula, L.sub.A is ##STR00001##
and L.sub.B is Formula I ##STR00002##

Disclosed is a long-afterglow luminescent material, comprising A) at least one light-absorbing agent, B) at least one luminescent agent, and C) at least one photochemical cache agent. The light-absorbing agent and the luminescent agent are compounds having different structures, and the cache agent is selected from one or more compounds of formula (I), (II) and/or (III).

##STR00001##

The material has luminescent intensity reaching the level of commercialized inorganic long-afterglow powder SrAl.sub.2O.sub.4:Eu.sup.2+, Dy.sup.3+, and can emit light when the exciting light is turned off with a light emitting time up to 100 ms to 3600 s.

The present disclosure relates to an organic metal compound, an organic light emitting diode and an organic light emitting device having the compound, in particular, to an organic metal compound having the following structure of Formula 1, an organic light emitting diode (OLED) and an organic light emitting device that includes the organic metal compound. The OLED and the organic light emitting device including the organic metal compound can improve their luminous efficiency, luminous color purity and lifespan.

Ir(L.sub.A).sub.m(L.sub.B).sub.n  [Formula 1]

The present application relates to alkylpyridinium substituted coumarin dyes and their uses as fluorescent labels. For example, these dyes may be used to label nucleotides for nucleic acid sequencing applications.

Provided is an organic electroluminescent device. The organic electroluminescent device has a first metal complex containing a ligand with a structure of Formula 1 and a first compound with a structure of Formula 2. Compared with the related art, a combination of such two compounds can significantly improve performance of the organic electroluminescent device, such as external quantum efficiency, power efficiency and current efficiency of the device. Further provided are an electronic apparatus including the organic electroluminescent device and a compound composition containing the first metal complex and the first compound.