Provided are a heterocyclic compound represented by Formula 1-1 or 1-2, an organic light-emitting device including the heterocyclic compound, and an electronic apparatus including the organic light-emitting device:

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Formulae 1-1 and 1-2 may each be understood by referring to the descriptions of Formulae 1-1 and 1-2 provided herein.

An organic light-emitting device includes first and second electrodes and a light-emitting layer disposed between the first and second electrodes. The light-emitting layer contains first and second compounds. The first compound is represented by formula [1] or [2]. The second compound is a hydrocarbon compound. In formulae [1] and [2], R.sub.1 to R.sub.12 and R.sub.21 to R.sub.32 are each independently selected from a hydrogen atom, alkyl groups, and other groups. Each m is an integer of 1 or more and 3 or less, and each n is an integer of 0 or more and 2 or less, provided that m+n is 3. Each X is a bidentate ligand. Each partial structure IrX is any of the structures illustrated in formulae [3] to [5]. In formulae [3] to [5], R.sub.41 to R.sub.55 are each independently selected from a hydrogen atom, alkyl groups, and other groups.

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An organic compound is represented by formula [1]. In formula [1], L and L′ are bidentate ligands different from each other, a partial structure IrL.sub.m is a partial structure represented by formula [2], and a partial structure IrL′.sub.n is a partial structure represented by formula [3-1] or formula [3-2].

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The present invention relates to a an organic electroluminescent device comprising at least one light-emitting layer B comprising at least one host material H.sup.B, at least one thermally activated delayed fluorescence (TADF) material E.sup.B, and at least one small full width at half maximum (FWHM) emitter S.sup.B wherein E.sup.B transfers energy to S.sup.B and S.sup.B emits light with an emission maximum in the wavelength range from 500 nm to 560 nm.

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.

This invention relates to an iridium metal complex. The iridium metal complex comprises no more than three 1,3-dihydro-2H-benzo[d]imidazol-2-ylidene based carbene cyclometalate ligands. The iridium metal complex provides a blue emission. This is useful for organic light emitting diode (OLED) components where blue emitters have trailed behind the advances of red and green emitters.

An organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; an emission layer between the first electrode and the second electrode; a hole transport region between the first electrode and the emission layer; and an electron transport region between the emission layer and the second electrode, wherein the electron transport region includes a first compound, at least one selected from the hole transport region and the electron transport region includes a second compound, the first compound is represented by one selected from Formulae 1A to 1D, and the second compound is represented by Formula 2A or Formula 2B: ##STR00001##

Disclosed herein are a white organic light-emitting device. The white organic light-emitting device enables an overall improvement in characteristics such as color temperature, efficiency, luminance, and service life, by changing the configuration of different types of emission layers in contact with each other, and a display device using the same.

A light emitting diode of an embodiment of the present disclosure includes a first electrode, a hole transport region on an upper portion of the first electrode and having a first refractive index, an emission layer on an upper portion of the hole transport region and having a second refractive index less than the first refractive index, an electron transport region on an upper portion of the emission layer, and a second electrode on an upper portion of the electron transport region.

An organic-light-emitting-diode device and a fabricating method thereof, a displaying base plate and a displaying device, wherein the organic-light-emitting-diode device includes a substrate, and an anode layer, an organic functional layer and a cathode layer that are provided in stacking on one side of the substrate, wherein the organic functional layer includes a first functional layer, a second functional layer and a light emitting layer that are provided in stacking, and the first functional layer is provided closer to the anode layer; and a HOMO energy level of the second functional layer is deeper than both of a HOMO energy level of the first functional layer and a HOMO energy level of a host material of the light emitting layer.