A light-emitting device and an electronic apparatus including the same are provided. The light-emitting device includes an emission layer that includes a first emission layer and a second emission layer.

Disclosed is a novel organometallic compound in which a main ligand (L.sub.A) has a fused ring structure including a thiophene group. The organometallic compound acts as a dopant of a phosphorescent light-emitting layer of an organic light-emitting diode. Thus, an operation voltage of the diode is lowered, and luminous efficiency and a lifespan thereof are improved.

Disclosed in the present invention is a deuterated indolocarbazole compound, mixture and formulation comprising the said compound, and an organic electronic device. For said deuterated indolocarbazole compound, in an indolocarbazole conjugated system, a C—H bonding is optionally replaced by a C-D bonding, thus reduces the reactivity of the compound and moreover allowing the superior chemical and environmental stability. The present invention applies the deuterated indolocarbazole compound to the organic electronic device and provided is a solution for improving the stability and lifespan of the device.

Disclosed is an OLED configuration that although comprises an exciplex that has an emission spectrum that is redder than the emission spectrum of the emitter, the emission from the exciplex is suppressed so that the overall OLED emission spectrum is still dominated by the emission of the emitter.

A novel organometallic compound represented by a following Chemical Formula I is described:

##STR00001##

wherein R represents a fused ring connected to X.sub.1 and X.sub.2, with variables as defined herein. The organometallic compound acts as a dopant of a light-emitting layer of an organic light-emitting diode. An organic light emitting device includes the organic light emitting diode and can be a display device or a lighting device. Improved color gamut of the diode, luminous efficiency and a lifespan thereof are achieved, as well as a lower operation voltage of the diode.

The present invention relates to a novel indole-based compound having excellent hole injection and transport capabilities, light-emitting capabilities, and the like, and an organic electroluminescence device which includes the indole-based compound in one or more organic material layers thereof so as to improve characteristics such as light-emitting efficiency, driving voltage, and lifespan.

Arrangements for phosphorescent blue emissive materials, layers, and devices are provided. The arrangements include a host having first a triplet energy level of at least 2.8 eV and an absolute difference of not more than 0.3 eV between the first singlet and triplet energy levels, and an emitter that includes an emissive transition metal complex and a first triplet energy level of at least 2.7 eV.

A condensed cyclic compound and an organic light-emitting device including the same are provided.

An electrochromic device is provided including a first substrate, a first electrode on the first substrate, a second substrate, a second electrode on the second substrate facing the first electrode, an electrochromic layer in contact with the first electrode, an anti-deterioration layer in contact with the second electrode facing the first electrode, and an electrolyte layer in contact with both the electrochromic layer and the anti-deterioration layer. At least one of the first electrode and the second electrode includes In.sub.2O.sub.3, and has an infrared light transmittance of 70% or more at a wavelength of 1,500 nm. The electrochromic layer includes a triarylamine-containing radical polymerizable compound represented by a specific formula.

An organometallic compound represented by Formula 1:

##STR00001## wherein, M is a transition metal; X.sub.1 is a chemical bond, O, S, N(R′), P(R′), B(R′), C(R′)(R″), or Si(R′)(R″); X.sub.2 to X.sub.4 are each independently C or N; a bond between X.sub.1 or Y.sub.1 and M is a covalent bond; one of a bond between X.sub.2 and M, X.sub.3 and M, and X.sub.4 and M is covalent and the other two are coordinate; Y.sub.1 and Y.sub.3-Y.sub.5 are each independently C or N; ring CY.sub.1 to ring CY.sub.4 are each independently a C.sub.5-C.sub.30 carbocyclic group or a C.sub.1-C.sub.30 heterocyclic group, and at least one of ring CY.sub.1 to ring CY.sub.4 is independently a condensed cyclic group wherein two or more rings are condensed with each other; and T.sub.1, X.sub.51, L.sub.1 to L.sub.4; R.sub.1 to R.sub.4, a1 to a4, b1 to b4, and c1 to c4 are as described herein.