An organic light emitting device (OLED) architecture in which efficient operation is achieved for the OLED having three hosts in the emissive layer by incorporating at least one multi-component functional layer selected from the group consisting of a hole injecting layer, a hole transporting layer, an electron blocking layer, a hole blocking layer, an electron transporting layer, and an electron injecting layer.

Provided is an electroluminescent device, including an anode, a cathode, and a light emitting layer disposed between the anode and the cathode, wherein the light emitting layer includes a host material and a dopant material; the host material includes a component A and a component B; the component A and the component B have the following general structural formula:

##STR00001## wherein n is a positive integer greater than or equal to 1; and Ar is any one of the following structures:

##STR00002##

Provided are a light-emitting device and an electronic apparatus. The light-emitting device includes a first electrode, a second electrode facing the first electrode, and an interlayer disposed between the first electrode and the second electrode. The interlayer includes an emission layer and an electron blocking layer, the electron blocking layer includes a first electron blocking layer and a second electron blocking layer. The first electron blocking layer includes a first compound, the second electron blocking layer comprises a second compound, and the first compound is different from the second compound.

Provided is an OLED device, which includes a first electrode, a second electrode, and a first light emitting unit located between the first electrode and the second electrode. An absorption rate of the first electrode for blue light is greater than an absorption rate of the first electrode for red light, and the absorption rate of the first electrode for blue light is greater than an absorption rate of the first electrode for green light. The first light emitting unit includes a light emitting layer and a hole functional unit located between the first electrode and the light emitting layer. The hole functional unit at least includes at least two hole functional layers, and any hole functional layer includes a second functional layer for injecting holes and a third functional layer for transporting holes which are stacked along a direction away from the first electrode.

An organic electroluminescent device is disclosed. The organic electroluminescent device includes a light-emitting layer that contains a plurality of hosts and dopants, where one of the plurality of hosts includes the same material as in an electron transport auxiliary layer in an electron transport region, whereby the organic electroluminescent device simultaneously exhibits effects such as low driving voltage, high luminous efficiency, and a long lifespan.

The present invention relates to organic electroluminescent devices, the emitting layer thereof containing a blend of a luminescent material having a narrow singlet-triplet gap and a fluorescent emission material having high steric shielding.

An electroluminescent device, a display substrate, and a display apparatus. The electroluminescent device comprises: an electron transport layer (1) and a quantum dot light emitting layer (3) that are arranged in a stack mode; and an ionic complex layer (2) located between the electron transport layer (1) and the quantum dot light emitting layer (3), wherein a built-in electric field is formed in the ionic complex layer (2).

An organometallic compound including a first ligand L.sub.A selected from

##STR00001## ##STR00002##

is provided. In ligand L.sub.A, each of Y.sup.1 to Y.sup.10 is carbon or nitrogen; moiety B is a monocyclic or polycyclic fused ring structure comprising 5-membered and/or 6-membered rings; any two R.sub.A and R.sub.B can be fused or joined to form a ring; X is selected from O, S, Se, or NR; each R.sub.A and R.sub.B is independently hydrogen or a General Substituent; at least one R, R.sub.A, or R.sub.B is deuterium or a linking group between L.sub.A and another ligand that includes a deuterium substituted aromatic ring; and L.sub.A is coordinated to a metal M, selected from Os, Pd, Pt, Ir, Cu, Ag, or Au; and the compound is capable of emitting light with a peak maximum wavelength (λ.sub.max)≥700 nm at room temperature.

The present disclosure relates to compounds capable of emitting delayed fluorescence, and uses of the compounds in organic light-emitting diodes.

A light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an interlayer between the first electrode and the second electrode and including a first layer, wherein the first electrode has a work function value of about −5.5 eV to about −6.1 eV, and the interlayer includes a second layer doped with a non-lead-based perovskite compound.