The present invention relates to metal amides of general Formula Ia and for their use as hole injection layer (HIL) for an Organic light-emitting diode (OLED), and a method of manufacturing Organic light-emitting diode (OLED) comprising an hole injection layer containing a metal amide of general Formula Ia: ##STR00001##

A composition, an interlayer manufactured therefrom, and an apparatus including the interlayer are provided. The composition includes a polymer compound represented by Formula 1, a non-arylamine-based compound represented by Formula 2, and a solvent: ##STR00001##
Z.sub.o.  <Formula 2> The substituents in Formulae 1 and 2 may be understood as described in connection with the detailed description.

An organic light emitting display device is discussed, which includes an anode on a substrate, a first hole transfer layer on the anode, a first emission layer on the first hole transfer layer, a first electron transfer layer on the first emission layer, an N-type charge generation layer on the first electron transfer layer, a second hole transfer layer on the N-type charge generation layer, a first emission control layer on the second hole transfer layer, an absolute value of a highest occupied molecular orbital (HOMO) energy level of the first emission control layer being greater than an absolute value of a HOMO energy level of the second hole transfer layer, a second emission layer on the first emission control layer, a second electron transfer layer on the second emission layer and a cathode on the second electron transfer layer.

The present invention relates to metal amides of general Formula Ia and for their use as hole injection layer (HIL) for an Organic light-emitting diode (OLED), and a method of manufacturing Organic light-emitting diode (OLED) comprising an hole injection layer containing a metal amide of general Formula Ia:

##STR00001##

An OLED device, including: an anode (100), a cathode (300), and a first light-emitting unit (200) located between the anode (100) and the cathode (300). The first light-emitting unit (200) comprises a hole functional unit (210) and a light-emitting layer (220) that are sequentially stacked. The hole functional unit (210) is located between the anode (100) and the light-emitting layer (220). The hole functional unit (210) comprises a first functional layer (211) for transporting electrons, a second functional layer (212) for injecting holes, and a third functional layer (213) for transporting holes, which are sequentially stacked. The first functional layer (211) comprises an electron transport material on which one or more among an active metal and an active metal compound is doped.

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.

A display device includes a first pixel electrode, a second pixel electrode, an insulating layer including a first opening part exposing a part of an upper surface of the first pixel electrode, and a second opening part exposing a part of an upper surface of the second pixel electrode, a first common layer arranged above the first pixel electrode, the second pixel electrode and the insulating layer, a first light-emitting layer a second light-emitting layer arranged above the first common layer; an opposite electrode arranged above the first light-emitting layer and the second light-emitting layer, a carrier absorption layer arranged above the insulating layer, the carrier absorption layer being arranged between the first common layer and the second light-emitting layer, and a light emission start voltage of the second light-emitting layer is lower than a light emission start voltage of the first light-emitting layer.

By providing a novel polycyclic aromatic compound in which a plurality of aromatic rings are linked via a boron atom, a nitrogen atom, or the like, options of a material for an organic EL element are increased. In addition, by using the novel polycyclic aromatic compound as a material for an organic electroluminescent element, an excellent organic EL element is provided.

The present disclosure relates to a nanomaterial, a light-emitting diode device, and a preparation method thereof. The nanomaterial includes a ZnO nanoparticle and an In.sub.2O.sub.3 shell layer covering a surface of the ZnO nanoparticle. In the present disclosure, the In.sub.2O.sub.3 shell layer are coated on the surface of the ZnO nanoparticle to form a ZnO@ In.sub.2O.sub.3 core shell structure, that is, prepare the nanomaterial. In the present disclosure, In.sub.2O.sub.3 having a wide bandgap is used as a shell layer to cover a semiconductor ZnO nanoparticle having a relatively narrow bandgap, which can effectively passivate the surface of the ZnO nanoparticle to reduce the surface defects and relieve lattice mismatch. Meanwhile, holes may be effectively blocked from being transported from a light-emitting layer to a cathode to improve the recombination efficiency of electrons and holes on the light-emitting layer. Thus, the light-emitting performance of the light-emitting device may be improved.

Disclosed are a display substrate, a display device and a manufacturing method for the display substrate. The display substrate comprises a base substrate, a first electrode located at one side of the base substrate, a charge auxiliary layer located at the side of the first electrode away from the base substrate, and a second electrode located at the side of the charge auxiliary layer away from the first electrode; the surface of the charge auxiliary layer away from the first electrode is provided with a plurality of relief structures distributed in an array; an acid generator is mixed in the charge auxiliary layer, and the content of the acid generator in regions of different thicknesses of the charge auxiliary layer is different.