The present disclosure provides a light emitting diode, a method of preparing the same, and a display device. The light emitting diode includes an anode, a quantum dot light emitting layer, an electron transport layer, a cathode, and a transition layer located between the electron transport layer and the cathode, the cathode including a transparent conductive oxide material, and a material of the transition layer having a work function W.sub.F between an LUMO of a material of the electron transport layer and a work function W.sub.F of a material of the cathode.

The present disclosure provides a light emitting diode, a method of preparing the same, and a display device. The light emitting diode includes an anode, a quantum dot light emitting layer, an electron transport layer, a cathode, and a transition layer located between the electron transport layer and the cathode, the cathode including a transparent conductive oxide material, and a material of the transition layer having a work function W.sub.F between an LUMO of a material of the electron transport layer and a work function W.sub.F of a material of the cathode.

Provided is an organic light-emitting device including: an anode; a cathode provided to face the anode; a light-emitting layer provided between the anode and the cathode; a first organic material layer provided between the anode and the light-emitting layer; and a second organic material layer provided between the cathode and the light emitting layer in which each organic material, from among organic materials included in the light-emitting layer and the organic material layers, the band gap energy (E.sub.bg) of each of the organic materials except for a dopant compound is 3 eV or more, the first organic material layer comprises one or more compounds each composed of centrally sp3 carbon, the second organic material layer includes one or more compounds each composed of centrally sp3 carbon, and the first organic material layer and the second organic material layer include three or more compounds each composed of centrally sp3 carbon.

The present specification relates to a heterocyclic compound represented by Chemical Formula 1, and an organic light emitting device including the same.

A display device includes a first pixel electrode, a second pixel electrode spaced apart from the first pixel electrode in a first direction, a first common layer on each of the first and second pixel electrodes, a second common layer on the first common layer, a first light-emitting layer on the first pixel electrode via the first and the second common layers, a second light-emitting layer on the second pixel electrode via the first and the second common layers, and a counter electrode on the first and second light-emitting layers, wherein the first common layer has a first region overlapping the first pixel electrode, a second region between the first and second pixel electrodes, and a third region overlapping the second pixel electrode, the second region is separated from each of the first and third regions, and the second common layer continuously covers the first, second, and third regions.

A display device includes a first pixel electrode, a second pixel electrode spaced apart from the first pixel electrode in a first direction, a first common layer on each of the first and second pixel electrodes, a second common layer on the first common layer, a first light-emitting layer on the first pixel electrode via the first and the second common layers, a second light-emitting layer on the second pixel electrode via the first and the second common layers, and a counter electrode on the first and second light-emitting layers, wherein the first common layer has a first region overlapping the first pixel electrode, a second region between the first and second pixel electrodes, and a third region overlapping the second pixel electrode, the second region is separated from each of the first and third regions, and the second common layer continuously covers the first, second, and third regions.

Embodiments provide a novel condensed cyclic compound, a light-emitting device including the condensed cyclic compound, and an electronic apparatus including the light-emitting device. The 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, wherein the interlayer includes an emission layer, and at least one of the condensed cyclic compound. The condensed cyclic compound is represented by Formula 1, which is explained in the specification:

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An organic borane complex contains, as a component, triarylborane having an enhanced bonding between a boron atom and a carbon atom on an aryl group. The organic borane complex contains, as a component, triarylborane having a structure represented by the following general formula (1), wherein X1 and X2 each independently represent an oxygen atom or a sulfur atom; X3 and X4 each independently represent a hydrogen atom or a substituent, or X3 and X4 are linked together to be a single atom; R1 to R3 each independently represent a hydrogen atom or a substituent; and p, q and r each independently represent an integer of 1 to 3. Also disclosed are a composition containing organic borane, and an organic electroluminescent element.

A fabrication method for a light-emitting device includes providing a hole functional layer disposed between a quantum dot light-emitting layer and an anode, and providing an electron functional layer disposed between the quantum dot light-emitting layer and a cathode. The hole functional layer includes a mixed material of a hole transport material and a hole injection material. A thickness of the hole functional layer being selected from a thickness range corresponding to ⅓˜⅔ of abscissa between an origin and a first positive trough in a cavity standing wave of the mixed material. The absolute value of a difference between a thickness of the electron functional layer and a thickness corresponding to a first positive crest of a cavity standing wave of an electron functional material is less than or equal to 5 nm.

To provide a transparent electrode that hardly causes migration of silver and has high resistance, a method for producing the same, and an electronic device using the transparent electrode.

A transparent electrode according to the embodiment includes a laminated structure in which a transparent base material, a conductive silver-containing layer, and a conductive oxide layer are laminated in this order,

wherein a ratio T.sub.800/T.sub.600 of total transmittances of the transparent electrode is 0.85 or more, where T.sub.800 and T.sub.600 are transmittances at wavelengths of 800 nm and 600 nm, respectively, and

the silver-containing layer is continuous. This electrode can be produced by bringing sulfur or a sulfur compound into contact with a laminated film in which a conductive silver-containing layer and a conductive oxide layer are laminated to form a sulfur-containing silver compound layer.